CN116907577A - Experimental device and method for simulating intelligent spray cooling and dust settling of underground coal mine roadway - Google Patents
Experimental device and method for simulating intelligent spray cooling and dust settling of underground coal mine roadway Download PDFInfo
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- CN116907577A CN116907577A CN202310870136.7A CN202310870136A CN116907577A CN 116907577 A CN116907577 A CN 116907577A CN 202310870136 A CN202310870136 A CN 202310870136A CN 116907577 A CN116907577 A CN 116907577A
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- 239000000428 dust Substances 0.000 title claims abstract description 162
- 238000001816 cooling Methods 0.000 title claims abstract description 102
- 239000007921 spray Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000003245 coal Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 478
- 238000011084 recovery Methods 0.000 claims abstract description 92
- 238000012360 testing method Methods 0.000 claims abstract description 80
- 238000002474 experimental method Methods 0.000 claims abstract description 26
- 238000004088 simulation Methods 0.000 claims abstract description 22
- 238000000889 atomisation Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 150
- 238000005507 spraying Methods 0.000 claims description 39
- 230000008569 process Effects 0.000 claims description 28
- 238000000746 purification Methods 0.000 claims description 28
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- 230000001276 controlling effect Effects 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000000080 wetting agent Substances 0.000 claims description 10
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- 238000012545 processing Methods 0.000 claims description 9
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- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 4
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- 239000000654 additive Substances 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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- G—PHYSICS
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Abstract
An experimental device and a method for simulating intelligent spray cooling and dust settling of a coal mine underground roadway, the device comprises: two ends of the test box body are respectively used as an air inlet and an air outlet, and a plurality of cooling and dust-settling areas and atomization units are arranged in the test box body; three atomizing nozzles in each atomizing unit are respectively positioned at the left part, the middle part and the right part; the integrated sensor is positioned in the test box body and is connected with the top of the test box body through a telescopic connecting rod; the air inlet control system and the dust emission system are arranged at the air inlet; the recovery pond is arranged at the bottom side of the inside of the test box body, the upper opening end of the recovery pond is provided with a pond cover plate, the inside of the recovery pond is provided with a water level sensor, and the water outlet at the bottom of the recovery pond is connected with a circulating water pump; the integrated circulating water supply system comprises a purifying device, a temperature control device and a water pressure control device, wherein the water inlet end of the integrated circulating water supply system is respectively connected with a high-pressure water source and a circulating water pump, and the water outlet end of the integrated circulating water supply system is connected with an atomizing nozzle. The method comprises the following steps: and after the experimental device is built, tested and adjusted, a simulation experiment is started. The device and the method can be used for integrally carrying out cooling and dust settling experiments.
Description
Technical Field
The invention belongs to the technical field of intelligent cooling and dust fall of mines, and particularly relates to an experimental device and method for simulating intelligent spraying cooling and dust fall of underground coal mine roadways.
Background
In the tunneling process of the coal mine tunnel, a tunneling working face is an operation place with larger dust yield, in addition, along with continuous operation of high-power tunneling equipment (an adhesive tape conveyor, a tunneling and anchoring integrated machine and the like), the heat release quantity of the equipment is continuously increased, so that the dust concentration in the whole tunneling tunnel is high, and meanwhile, the temperature in the tunneling tunnel is also high.
At present, most underground coal mine cooling and dust fall systems independently operate, and the two systems cannot be integrated effectively, so that integrated combined operation cannot be realized, and therefore, the input cost is high, the comprehensive benefit is low, and the daily maintenance is very inconvenient. In the prior art, the cooling operation of tunneling tunnel adopts the mode of conventional cold air flood irrigation generally, and this kind of mode energy loss is huge, and is with high costs, and its cooling effect easily receives the restriction of wind speed, and simultaneously, this kind of mode lacks the precision, can not pinpoint the cooling region, and the extravagant condition of cold volume before work and after work is serious, and the somatosensory of operating personnel is relatively poor. The dust falling operation of the tunneling roadway usually adopts a normal-temperature water spraying mode, and the existing spraying equipment is simple in structure, single in function and poor in water resource waste, and meanwhile, the cooling effect is not ideal. In order to effectively study the integration of the cooling system and the dust fall system. Therefore, it is needed to provide an experimental device capable of realizing the integrated operation of cooling and dust fall, so as to provide reliable technical support for the integration scheme of actual cooling and dust fall.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides the experimental device and the method for simulating the intelligent spray cooling and dust fall of the underground tunnel of the coal mine, which have the advantages of simple structure, low manufacturing cost and higher automation degree, can effectively simulate the tunneling environment of the underground tunnel, can integrally perform cooling and dust fall operation, are beneficial to accurately and reliably obtaining the cooling and dust fall data under different working conditions, and can provide reliable technical support for the integration scheme of actual cooling and dust fall; the method has simple steps and low implementation cost, can integrally carry out the cooling and dust settling experiments in an analog simulation mode, and can comprehensively and accurately acquire experimental data under different working conditions in multiple directions.
In order to achieve the aim, the invention provides an experimental device for simulating intelligent spray cooling and dust fall of a coal mine underground roadway, which comprises a test box body, an atomization unit, an integrated sensor, an air inlet control system, a dust emission system, a recovery water tank, a water tank cover plate, a water level sensor, an integrated circulating water supply system and a data processor, wherein the test box body is provided with a water inlet control system;
the length direction of the test box body extends along the front-back direction, the front end and the back end of the test box body are open, the front end of the test box body is used as an air outlet, and the back end of the test box body is used as an air inlet; the inner space of the test box body is provided with a plurality of cooling and dust-settling areas along the length direction;
The number of the atomizing units is in one-to-one correspondence with the number of the cooling and dust falling areas, each atomizing unit consists of three atomizing nozzles positioned in the test box body, and the three atomizing nozzles are respectively arranged at the left part, the middle part and the right part of the top end of the area;
the integrated sensor is located in the test box and comprises a telescopic connecting rod, a sensor mounting frame, a wind speed and air quantity sensor, a temperature sensor, a humidity sensor, a data processor, a data storage module, a wireless transmission antenna and a waterproof and dustproof shell, wherein the telescopic connecting rod is vertically arranged, the upper end of the telescopic connecting rod is connected with a top plate of the test box, the sensor mounting frame is located in the middle of the height direction of the test box and is fixedly connected to the lower end of the telescopic connecting rod, the wind speed and air quantity sensor, the temperature sensor and the humidity sensor are all installed on a sensor bracket, the data processor and the data storage module are installed in the waterproof and dustproof shell, the wireless transmission antenna is installed outside the waterproof and dustproof shell, the waterproof and dustproof shell is installed on the sensor bracket, and the data processor is respectively connected with the sensor mounting frame, the wind speed and air quantity sensor, the temperature sensor, the humidity sensor, the data storage module and the wireless transmission antenna; the integrated sensors are sequentially arranged in the center part of the inner space of the test box body along the length direction of the test box body, and are used for collecting wind speed and air quantity signals, temperature signals and humidity signals of the respective areas in real time, processing the collected signals and transmitting the processed signals to external equipment through the wireless transmission antenna;
The air inlet control system is arranged at the air inlet and is used for providing an air source for the inside of the test box body and adjusting the air inlet speed, the air inlet temperature and the air inlet humidity;
the dust emission system is arranged at the air inlet and is used for emitting dust into the test box body and adjusting the particle size and lithology of the generated dust;
the size of the recovery water tank is matched with the size of the inside of the test box body, and the recovery water tank is fixedly arranged at the bottom side of the inside of the test box body and is used for collecting and storing spray liquid; a water outlet is formed in the bottom of the recovery water tank and is connected with a water inlet end of an external circulating water pump through a communication pipeline;
the water tank cover plate is a grid plate with a plurality of water leakage holes distributed on the surface, the size of the grid plate is matched with the size of the upper opening end of the recovery water tank, and the grid plate is covered on the upper opening end of the recovery water tank;
the water level sensor is arranged in the recovery water tank, and is used for collecting liquid level signals in the recovery water tank in real time and sending the liquid level signals to external equipment;
the integrated circulating water supply system comprises purifying equipment, temperature control equipment and water pressure control equipment, wherein the purifying equipment is used for purifying spray liquid water supply and changing water supply components of the spray liquid, the water inlet end of the purifying equipment is connected with an external high-pressure water source through an external water supply pipeline and is also connected with the water outlet end of a circulating water pump through a circulating water supply pipeline, the temperature control equipment is used for adjusting the water supply temperature of the spray liquid, the water inlet end of the temperature control equipment is connected with the water outlet end of the purifying equipment, the water outlet end of the temperature control equipment is connected with the water inlet end of the water pressure control equipment, the water pressure control equipment is used for adjusting the water supply pressure of the spray liquid, and the water pressure control equipment is respectively connected with the water inlet ends of a plurality of atomizing nozzles through a plurality of pressure-resistant water pipes; the external water supply pipeline is connected with a first electromagnetic valve in series; the circulating water supply pipeline is connected with a second electromagnetic valve in series; each pressure-resistant water pipe is connected with a third electromagnetic valve in series;
The data processor is internally provided with a wireless communication module and is connected with a plurality of integrated sensors in a wireless mode, and the output end of the data processor is respectively connected with an air inlet control system, a dust emission system, a water level sensor, purifying equipment, temperature control equipment, water pressure control equipment, a display, a circulating water pump, a first electromagnetic valve, a second electromagnetic valve and a plurality of third electromagnetic valves.
Further, in order to enable the test box body to have good heat insulation and moisture insulation capacity, the test box body is composed of a box-type frame and a heat insulation and air insulation cover body wrapped outside the box-type frame, the heat insulation and air insulation cover body is of a double-layer structure, the inner layer is a double-layer vacuum heat insulation glass layer, and the outer layer is a polyurethane foam board layer.
Furthermore, in order to be convenient to assemble and disassemble, simultaneously, the floor space can be effectively saved when the box-type frame is disassembled, and the box-type frame is composed of a plurality of stainless steel pipes and steel pipe buckles for connecting adjacent stainless steel pipes.
Preferably, the data processor is an industrial computer.
Furthermore, in order to facilitate the installation, simultaneously, can also save occupation of land space when storing, the recovery pond is folding pond.
Preferably, the pressure-resistant water pipe can bear water pressure of 10 MPa.
According to the invention, the length of the telescopic connecting rod can be flexibly adjusted according to different acquisition position requirements by arranging the telescopic connecting rod on the integrated sensor, so that the sensor can accurately acquire the preset position signals. The integrated sensor is integrated with the wind speed and air quantity sensor, the temperature sensor and the humidity sensor, and can collect the wind speed and air quantity signals, the temperature signals and the humidity signals of the area at the same time, thereby being beneficial to comprehensively providing the data required by the experiment. Through having built-in wireless transmission antenna that has of integrated sensor to be connected with data processor through wireless mode, not only can simplify the step of transmission signal line wiring, can also be favorable to avoiding the occupation of transmission signal line to experimental space, be favorable to obtaining more accurate more comprehensive experimental data. Through setting up air inlet control system and dust emission system simultaneously at the air intake of test box, can simulate the different return air of tunneling working face and the dust circumstances of tunneling when the tunnel is tunneled through the cooperative control of two, and then can realize the simulation of underground working face environment. The recovery pond is assembled at the bottom of the test box body, so that the spray liquid can be recovered and stored in a centralized mode, the water resource recycling can be conveniently realized in the follow-up test process, and the water resource can be greatly saved. The pond apron lid with a plurality of hole that leaks is established in the upper opening end of retrieving the pond, not only can ensure the normal recovery operation of retrieving the pond to the spraying liquid, still is favorable to the maintenance personnel to stand on the pond apron and carries out the maintenance operation of experimental apparatus. The water level sensor is arranged in the recovery water tank, meanwhile, the water outlet is arranged at the bottom of the recovery water tank, and the water outlet is connected with the circulating water pump, so that the data processor can conveniently acquire liquid level data in the recovery water tank in real time, and further, the start-stop operation of the circulating water pump can be conveniently controlled according to the liquid level condition, and the recycling process of the collected spray liquid can be automatically realized. The water inlet end of the purification equipment is connected with an external high-pressure water source through an external water supply pipeline and is also connected with the water outlet end of the circulating water pump through a circulating water supply pipeline, and meanwhile, the first electromagnetic valve is arranged on the external water supply pipeline, and the second electromagnetic valve is arranged on the circulating water supply pipeline. And the solenoid valve III is arranged on each pressure-resistant pipeline, so that the work of part of atomizing nozzles can be selectively controlled, and different experimental requirements can be met. Through the setting of clarification plant, not only can purify outside high-pressure water source, can also purify the spray liquid that the recovery pond was retrieved, effectively ensured the quality of water that gets into atomizing nozzle in addition, because clarification plant can also change the composition of supplying water, the cooling dust fall effect of spray liquid when can simulate different additive filling better like this. Through the setting of control by temperature change equipment, can conveniently change the temperature of nozzle liquid water supply, like this, can be convenient for obtain the required spraying liquid temperature of experiment. Through the setting of water pressure control equipment, can conveniently change the spraying liquid water supply pressure, like this, can be convenient for obtain the required spraying liquid water supply pressure of experiment. The device simple structure, low in manufacturing cost, degree of automation are higher, and it can simulate the tunnelling environment in mine tunnel effectively, simultaneously, can carry out cooling dust fall operation with the integration, can also simulate different cooling dust fall conditions according to different experimental needs, is favorable to accurately and reliably obtaining the cooling dust fall data under the different operating modes, can provide reliable technical support for the integrated scheme of actual cooling dust fall, helps improving colliery safety in production level.
The invention also provides an experimental method for simulating intelligent spray cooling and dust falling of the underground tunnel of the coal mine, which adopts an experimental device for simulating intelligent spray cooling and dust falling of the underground tunnel of the coal mine, and comprises the following steps:
step one: setting up an experimental device;
s11: constructing a box-type frame by utilizing a plurality of stainless steel pipes and a plurality of steel pipe buckles;
s12: a recovery pond is arranged at the bottom of the box-type frame, and a pond cover plate is covered at the upper opening end of the recovery pond;
s13: sequentially dividing a plurality of cooling and dust-falling areas along the length direction in the inner space of the test box body according to a set row distance, arranging an atomization unit in each cooling and dust-falling area, and installing three atomization nozzles in each atomization unit at the top of each cooling and dust-falling area according to a set interval;
installing a plurality of integrated sensors in the test box according to the position to be experimentally monitored, and installing an air inlet control system and a dust emission system at an air inlet of the test box;
the purification equipment, the temperature control equipment and the water pressure control equipment are sequentially connected, the water inlet end of the purification equipment is connected with a high-pressure water source, and the water outlet end of the water pressure control equipment is respectively connected with the water inlet ends of a plurality of atomizing nozzles through a plurality of pressure-resistant water pipes;
Step two: testing and adjusting an experimental device;
s21: closing the purification function of the purification equipment, closing the temperature regulation function of the temperature control equipment and closing the pressure regulation function of the water pressure control equipment, so that the integrated circulating water supply system only has the function of communicating a high-pressure water source with a pressure-resistant water pipe, keeping the closing state of an air inlet control system and the closing state of a dust emission system, keeping the closing state of a solenoid valve II, opening the solenoid valve I and all solenoid valves III, and flushing the integrated circulating water supply system, a plurality of pressure-resistant water pipes and a plurality of atomizing nozzles by using the high-pressure water source;
s22: opening a purification function of the purification equipment, a temperature regulation function of the temperature control equipment and a pressure regulation function of the water pressure control equipment, purifying water supply of the spray liquid by the purification equipment, regulating the water supply of the spray liquid to a set temperature by the temperature control equipment, regulating the water supply of the spray liquid to a set pressure by the water pressure control equipment, supplying the treated water supply of the spray liquid to an atomization nozzle through a pressure-resistant water pipe, and spraying the treated water supply of the spray liquid to form water mist through the atomization nozzle;
s23: observing the spraying direction of the atomizing nozzles under the windless condition, and adjusting the spraying direction of each atomizing nozzle to be vertical and downward;
S24: the method comprises the steps of acquiring wind speed and air volume signals, temperature signals and humidity signals of respective areas in real time by using an integrated sensor, processing the acquired signals, then sending the processed signals to a data processor through a wireless transmission antenna, acquiring wind speed and air volume data, temperature data and humidity data of the areas according to the received wind speed and air volume signals, temperature signals and humidity signals by the data processor, and sending the wind speed and air volume data, temperature data and humidity data to a display for real-time display;
by observing the data displayed on the display, judging whether each integrated sensor works normally or not, and replacing the faulty integrated sensor;
s25: closing the first electromagnetic valve, keeping the closing state of the second electromagnetic valve, keeping the stopping state of the circulating water pump, closing a water channel of the integrated circulating water supply system, opening an air inlet control system and a dust emission system, providing a wind source for setting the wind speed and the temperature and humidity by using the air inlet control system, and emitting dust with the lithology and the particle size by using the dust emission system;
acquiring wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensors are located through the integrated sensors, sending the signals to the data processor, acquiring wind speed and air volume data, temperature data and humidity data of different areas according to the received signals by the data processor, sending the data to the display for real-time display, and judging whether an air inlet control system and a dust emission system work normally or not through observing the data displayed on the display, and executing the step III after confirming the normal operation;
Step three: perfecting an experimental device;
firstly, wrapping the outer surface of a box-type frame main body by using a high-strength high-wear-resistance plastic film to isolate a part between an air inlet and an air outlet from the external environment, and then sequentially paving a double-layer vacuum heat-insulating glass layer and a polyurethane foam board layer on the outer surface of the box-type frame main body to form a multi-layer protection structure for isolating air and temperature and humidity outside the box-type frame main body;
step four: starting a simulation experiment;
simulation experiment one:
s41: simulating a mine tunnel tunneling environment, opening an air inlet control system, setting temperature and humidity and air speed parameters of air inlet, opening a dust emission system, setting lithology and particle size parameters of dust, providing the air inlet with the air inlet control system with the set air speed and temperature and humidity, and emitting the dust with the set lithology and particle size by the dust emission system;
acquiring wind speed and air volume signals, temperature signals and humidity signals of the areas in which the integrated sensors are positioned in real time, processing the acquired signals and then sending the processed signals to a data processor, acquiring wind speed and air volume data, temperature data and humidity data of the areas in which the data processor is positioned according to the received wind speed and air volume signals, temperature signals and humidity signals, sending the wind speed and air volume data, the temperature data and the humidity data to a display for real-time display, and continuing the process for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
S42: opening the first electromagnetic valve, keeping the closing state of the second electromagnetic valve, and setting the water supply components, the water supply water temperature and the water supply water pressure of the spray liquid by adjusting parameters of the purifying equipment, the temperature control equipment and the water pressure control equipment; the temperature and dust reduction operation under the following three working conditions is sequentially carried out: 1. the data processor is used for controlling a plurality of electromagnetic valves three close to the left row to open, and the rest of electromagnetic valves three close, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles close to the left row in a plurality of atomizing units; 2. the data processor is used for controlling a plurality of electromagnetic valves three in the middle row to be opened, and the rest electromagnetic valves three are closed, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles in the middle row in a plurality of atomizing units; 3. the data processor is used for controlling a plurality of electromagnetic valves three close to the right row to be opened, and the other electromagnetic valves three close to the right row, so that cooling and dust falling operations are carried out on a plurality of cooling and dust falling areas through a plurality of atomizing nozzles close to the right row in a plurality of atomizing units; in the cooling and dust settling operation process of each working condition, all the integrated sensors are utilized to collect wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensors are located, a data processor is utilized to obtain wind speed and air volume data, temperature data and humidity data of different areas, and the wind speed and air volume data, temperature data and humidity data are utilized to obtain the influence relation of three different spraying positions on the temperature, humidity and dust concentration of different areas;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank, liquid level signals of the recovery water tank are collected in real time through the water level sensor and are sent to the data processor in real time, the data processor obtains liquid level data of the recovery water tank according to the received liquid level signals, when the liquid level data is larger than or equal to an upper limit value, the data processor controls the electromagnetic valve II to be opened, the circulating water pump to start to work, meanwhile controls the electromagnetic valve I to be closed, the liquid recovered by the recovery water tank is utilized to supply water to the integrated circulating water supply system, when the liquid level data is smaller than or equal to a lower limit value, the data processor controls the electromagnetic valve I to be opened, meanwhile controls the electromagnetic valve II to be closed, the circulating water pump to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
s43: opening the first electromagnetic valve and all the third electromagnetic valves, keeping the closing state of the second electromagnetic valve, keeping the stopping state of the circulating water pump, sequentially changing the water supply components of spray liquid, the water supply temperature of the spray liquid and the water supply pressure of the spray liquid by adjusting parameters of the purifying equipment, the temperature control equipment and the water pressure control equipment, and recording the adjusted parameters;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank, liquid level signals of the recovery water tank are collected in real time through the water level sensor and are sent to the data processor in real time, the data processor obtains liquid level data of the recovery water tank according to the received liquid level signals, when the liquid level data is larger than or equal to an upper limit value, the data processor controls the electromagnetic valve II to be opened, the circulating water pump to start to work, meanwhile controls the electromagnetic valve I to be closed, the liquid recovered by the recovery water tank is utilized to supply water to the integrated circulating water supply system, when the liquid level data is smaller than or equal to a lower limit value, the data processor controls the electromagnetic valve I to be opened, meanwhile controls the electromagnetic valve II to be closed, the circulating water pump to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
simulation experiment II:
s51: firstly simulating a mine tunnel environment, opening an air inlet control system, setting temperature, humidity and air speed parameters of air inlet, then simulating the ongoing spray cooling and dust settling working conditions of a mine, opening a first electromagnetic valve and all third electromagnetic valves, keeping the closing state of the second electromagnetic valve, keeping the stopping state of a circulating water pump, setting the water supply components, water supply temperature and water supply pressure of spray liquid by adjusting parameters of purifying equipment, temperature control equipment and water pressure control equipment, and utilizing all atomizing nozzles in a plurality of atomizing units to carry out cooling and dust settling operation on a plurality of cooling and dust settling areas; meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank, liquid level signals of the recovery water tank are collected in real time through the water level sensor and are sent to the data processor in real time, the data processor obtains liquid level data of the recovery water tank according to the received liquid level signals, when the liquid level data is larger than or equal to an upper limit value, the data processor controls the electromagnetic valve II to be opened, the circulating water pump to start to work, meanwhile controls the electromagnetic valve I to be closed, the liquid recovered by the recovery water tank is utilized to supply water to the integrated circulating water supply system, when the liquid level data is smaller than or equal to a lower limit value, the data processor controls the electromagnetic valve I to be opened, meanwhile controls the electromagnetic valve II to be closed, the circulating water pump to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
Acquiring wind speed and air volume signals, temperature signals and humidity signals of the areas in which the integrated sensors are positioned in real time, processing the acquired signals and then sending the processed signals to a data processor, acquiring wind speed and air volume data, temperature data and humidity data of the areas in which the data processor is positioned according to the received wind speed and air volume signals, temperature signals and humidity signals, sending the wind speed and air volume data, the temperature data and the humidity data to a display for real-time display, and continuing the process for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
s52: the dust emission system is opened, lithology and particle diameter parameters of dust are sequentially adjusted according to experimental requirements so as to simulate working conditions of tunneling rock bodies with different lithology, in the process, the adjusted parameters are recorded, wind speed and air quantity signals, temperature signals and humidity signals of areas where the dust emission system is positioned are collected by utilizing all integrated sensors, wind speed and air quantity data, temperature data and humidity data of different areas are obtained by utilizing a data processor, and the influence relation of lithology and particle diameter of different dust on the temperature and humidity of different areas is obtained by utilizing the recorded adjusting parameters, wind speed and air quantity data, temperature data and humidity data;
Step five: the simulation experiment is completed;
dismantling and storing the experimental device to save the site space; and (3) arranging experimental data, and selecting the scheme with the optimal cooling and dust settling effects according to the experimental data.
Preferably, in step S42, the purifying apparatus has a magnetizing function, and the upper part thereof has a filling passage communicating with the internal water passage thereof, and the purifying apparatus changes the water supply composition by magnetizing the spray liquid water supply and adding the wetting agent. By adding different wetting agents, the wettability of water to dust can be effectively increased, so that the dust settling effect can be remarkably improved.
In the invention, before the simulation experiment is started, the pressure-resistant water pipe and the atomizing nozzle are washed, so that the interference of residual substances in the previous experiment process on the experimental data can be avoided. And then the spraying direction of each atomizing nozzle is adjusted downwards, and then a simulation experiment is started after the functions of each integrated sensor, the air inlet control system and the dust emission system are confirmed to be normal, so that more accurate experimental data can be obtained. For the box frame, the high-strength high-wear-resistance plastic film is firstly used for wrapping the outer surface of the box frame, and then a double-layer vacuum heat-insulating glass layer and a polyurethane foam board layer are sequentially paved outside the box frame, so that the influence of external environment can be effectively isolated, and the accuracy of experimental data is further ensured. In the cooling and dust settling experiment process, the spray liquid is recovered in real time by utilizing the recovery water tank, and the recovered water is supplied to the purification equipment by utilizing the circulating water pump, so that the cyclic utilization of water resources can be realized, and the water consumption consumed in the experiment process is saved. For the working condition that the wetting agent is added to the water flowing through the purification equipment in the experimental process, the mode of recycling the water in the recovery water tank can also effectively save the consumption of the wetting agent. The liquid level signal in the recovery pond is acquired in real time through the water level sensor, and the liquid level signal can be used as an action triggering condition, so that the data processor can automatically control the opening and closing actions of the first electromagnetic valve and the second electromagnetic valve and the starting and stopping actions of the circulating water pump, and the recovered liquid or an external water source can be automatically utilized as a spray liquid supply source. The data processor is used for controlling the opening and closing actions of a part of electromagnetic valves III so as to control the atomizing nozzles at different spraying positions to work, and the influence relation of different spraying positions on different area temperatures, humidity and dust attempts can be obtained through experiments. Through the regulation to the composition, temperature and the water pressure of supplying water, can obtain different water supply compositions, different water supply temperatures, different water supply pressure's influence relation to different regional temperature, humidity and dust concentration through the experiment. Through the adjustment of parameters of lithology and particle size of dust, the influence relationship of lithology and particle size of different dust on temperature and humidity of different areas can be obtained through experiments. The method has simple steps and low implementation cost, can integrally carry out the cooling and dust settling experiments in an analog simulation mode, can comprehensively and accurately acquire experimental data under different working conditions in multiple directions, and can provide reliable technical support for an integration scheme of actual cooling and dust settling.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a double vacuum insulating glass layer according to the present invention;
FIG. 3 is a schematic structural view of a polyurethane foam slab layer of the present invention;
FIG. 4 is a schematic view of the structure of the box frame of the present invention;
FIG. 5 is a schematic view of the structure of the atomizing nozzle in the present invention;
FIG. 6 is a schematic view showing the state of spraying by the left row of atomizing nozzles in the present invention;
FIG. 7 is a schematic view showing the state of spraying of the right row of atomizing nozzles according to the present invention;
FIG. 8 is a schematic illustration of the spray pattern of the middle row of atomizing nozzles according to the present invention;
FIG. 9 is a schematic diagram showing the spray state of all the atomizing nozzles in the same atomizing unit according to the present invention; the method comprises the steps of carrying out a first treatment on the surface of the
FIG. 10 is a schematic view of the assembly of the integrated sensor, atomizing nozzle and test chamber of the present invention;
FIG. 11 is a schematic diagram of the structure of an integrated sensor of the present invention;
FIG. 12 is a schematic view showing a state in which the atomizing nozzle sprays downward in the present invention;
fig. 13 is a schematic view showing a state in which the atomizing nozzle is atomizing toward the dust source in the present invention.
In the figure: 1. the device comprises a heat-insulating and air-insulating cover body, 2, a box-type frame, 3, an atomizing nozzle, 4, an integrated sensor, 5, an air inlet control system, 6, a dust emission system, 7, a pool cover plate, 8, a recovery pool, 9, a water outlet, 10, a pressure-resistant water pipe, 11, purifying equipment, 12, temperature control equipment, 13, water pressure control equipment, 14, an external water supply pipeline, 15, a circulating water supply pipeline, 16, a solenoid valve I, 17, a solenoid valve II, 18, a solenoid valve III, 19, a circulating water pump, 20 and a test box body;
1-1 parts of double-layer vacuum heat-insulating glass layers, 1-2 parts of polyurethane foam board layers, 2-1 parts of stainless steel pipes, 2-2 parts of steel pipe buckles, 4-1 parts of telescopic connecting rods, 4-2 parts of wind speed and wind quantity sensors, 4-3 parts of temperature sensors, 4-4 parts of humidity sensors, 4-5 parts of wireless transmission antennas, 4-6 parts of sensor mounting frames.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 13, the invention provides an experimental device for simulating intelligent spraying, cooling and dust fall of a coal mine underground roadway, which comprises a test box body 20, an atomization unit, an integrated sensor 4, an air inlet control system 5, a dust emission system 6, a recovery water tank 8, a water tank cover plate 7, a water level sensor, an integrated circulating water supply system and a data processor;
the length direction of the test box body 20 extends along the front-back direction, the front end and the back end of the test box body are open, the front end of the test box body is used as an air outlet, and the back end of the test box body is used as an air inlet; the inner space of the test box body 20 is provided with a plurality of cooling and dust-settling areas along the length direction;
the number of the atomizing units is in one-to-one correspondence with the number of the cooling and dust falling areas, each atomizing unit consists of three atomizing nozzles 3 positioned in the test box 20, and the three atomizing nozzles 3 are respectively arranged at the left part, the middle part and the right part of the top end of the area;
As a preferable mode, the atomizing nozzle 3 is an intelligent rotatable atomizing nozzle which can be connected with a data processor, so that the data processor can intelligently adjust the spraying direction of the atomizing nozzle 3 according to environmental parameters, the atomizing nozzle 3 can be turned to the direction with the highest temperature and dust concentration, the spraying direction can be ensured to be fully impacted with dust, and the efficiency of spraying, cooling and dust falling can be effectively improved;
the integrated sensor 4 is positioned in the test box 20 and comprises a telescopic connecting rod 4-1, a sensor mounting rack 4-6, a wind speed and air quantity sensor 4-2, a temperature sensor 4-3, a humidity sensor 4-4, a data processor, a data storage module, a wireless transmission antenna 4-5 and a waterproof and dustproof shell, wherein the telescopic connecting rod 4-1 is vertically arranged, the upper end of the telescopic connecting rod is connected with a top plate of the test box 20, the sensor mounting rack 4-6 is positioned in the middle of the height direction of the test box 20 and is fixedly connected with the lower end of the telescopic connecting rod 4-1, the wind speed and air quantity sensor 4-2, the temperature sensor 4-3 and the humidity sensor 4-4 are all arranged on a sensor bracket, the data processor and the data storage module are arranged in the waterproof and dustproof shell, the wireless transmission antenna 4-5 is arranged outside the waterproof and dustproof shell, the waterproof and dustproof shell is arranged on the sensor bracket, and the data processor is respectively connected with the sensor 4-6, the wind speed sensor 4-2, the temperature sensor 4-3, the humidity sensor 4-5 and the wireless transmission antenna 4-4; the integrated sensors 4 are sequentially arranged at the central part of the inner space of the test box 20 along the length direction of the test box 20 and are used for collecting the wind speed and air quantity signals, the temperature signals and the humidity signals of the respective areas in real time, processing the collected signals and transmitting the processed signals to external equipment through the wireless transmission antenna 4-5;
The air inlet control system 5 is installed at the air inlet, and as a preferred mode, the air inlet control system 5 is located at the center of the air inlet, and the air blowing direction of the air inlet control system faces the air outlet direction, so that an air source is provided for the inside of the test box 20, and the air inlet speed, the air inlet temperature and the air inlet humidity can be adjusted;
the dust emission system 6 is installed at the air inlet, and as a preferred mode, the dust emission system 6 is located at the center of the air inlet, and the emission direction of the dust emission system faces the air outlet direction, so as to emit dust into the test box 20, and can adjust the particle size and lithology of the generated dust;
the size of the recovery water tank 8 is matched with the size of the inside of the test box body 20, and the recovery water tank is fixedly arranged at the bottom side of the inside of the test box body 20 and is used for collecting and storing spray liquid; a water outlet 9 is formed in the bottom of the recovery water tank 8, and the water outlet 9 is connected with the water inlet end of an external circulating water pump 19 through a communication pipeline;
the pool cover plate 7 is a grid plate with a plurality of water leakage holes distributed on the surface, the size of the grid plate is matched with the size of the upper opening end 8 of the recovery pool 8, and the grid plate is covered on the upper opening end of the recovery pool 8; as a preferable mode, the pool cover plate 7 is formed by splicing a plurality of cover plate monomers, so that the disassembly and assembly are convenient, the maintenance operation is convenient, and maintenance personnel can stand on the pool cover plate 7 for operation during the maintenance operation;
The water level sensor is arranged in the recovery water tank 8 and is used for collecting liquid level signals in the recovery water tank 8 in real time and sending the liquid level signals to external equipment;
the integrated circulating water supply system comprises a purifying device 11, a temperature control device 12 and a water pressure control device 13, wherein the purifying device 11 is used for purifying spray liquid water supply and changing water supply components of the spray liquid, the water inlet end of the purifying device 11 is connected with an external high-pressure water source through an external water supply pipeline 14 and is also connected with the water outlet end of a circulating water pump 19 through a circulating water supply pipeline 15, the temperature control device 12 is used for adjusting the water supply temperature of the spray liquid, the water inlet end of the temperature control device 12 is connected with the water outlet end of the purifying device 11, the water outlet end of the temperature control device is connected with the water inlet end of the water pressure control device 13, the water pressure control device 13 is used for adjusting the water supply pressure of the spray liquid, and the water pressure control device 13 is respectively connected with the water inlet ends of a plurality of atomizing nozzles 3 through a plurality of pressure-resistant water pipes 10; the external water supply pipeline 14 is connected with a first electromagnetic valve 16 in series; the circulating water supply pipeline 15 is connected with a second electromagnetic valve 17 in series; each pressure-resistant water pipe 10 is connected with a solenoid valve III 18 in series;
as a preferred mode, the purifying device 11, the temperature control device 12 and the water pressure control device 13 may be controlled by manual operation, or may be automatically controlled by a data processor, and the data processor may automatically control the purifying device 11, the temperature control device 12 and the water pressure control device 13 according to environmental parameter conditions, so that it may be beneficial to automatically purifying the spray liquid supply water, automatically cooling and raising the spray liquid supply water temperature, and automatically adjusting the spray liquid supply water pressure, thereby being beneficial to implementing the intelligent integrated spray cooling and dust reducing operation.
The data processor is internally provided with a wireless communication module and is connected with a plurality of integrated sensors 4 in a wireless mode, and the output ends of the data processor are respectively connected with an air inlet control system 5, a dust emission system 6, a water level sensor, a purification device 11, a temperature control device 12, a water pressure control device 13, a display, a circulating water pump 19, a first electromagnetic valve 16, a second electromagnetic valve 17 and a plurality of third electromagnetic valves 18.
In order to enable the test box body 20 to have good heat insulation and moisture insulation capacity, the test box body 20 consists of a box-type frame 2 and a heat insulation and air insulation cover body 1 wrapped outside the box-type frame 2, wherein the heat insulation and air insulation cover body 1 is of a double-layer structure, the inner layer is a double-layer vacuum heat insulation glass layer 1-1, and the outer layer is a polyurethane foam board layer 1-2. As a further preferred option, the double-layer vacuum insulating glass layer 1-1 is a rapid-spliced and rapid-detachable structure, which is composed of a plurality of double-layer vacuum insulating glass pieces matched with the main body of the test box 20; the polyurethane foam board layer 1-2 is of a structure which can be spliced and disassembled quickly and consists of a plurality of polyurethane foam boards which are matched with the main body of the test box body 20;
in order to facilitate assembly and disassembly, simultaneously, occupied space can be effectively saved during disassembly, and the box-type frame 2 consists of a plurality of stainless steel pipes 2-1 and steel pipe buckles 2-2 for connecting adjacent stainless steel pipes 2-1.
Preferably, the data processor is an industrial computer.
In order to facilitate installation and save occupied space during storage, the recovery water tank 8 is a folding water tank.
Preferably, the pressure-resistant water pipe 10 can bear a water pressure of 10 MPa.
Preferably, in step S42 of the fourth step, the purifying apparatus 11 has a magnetizing function, and the upper portion thereof has a filling passage communicating with the internal water passage thereof, and the purifying apparatus 11 changes the water supply composition by magnetizing the spray water supply and adding the wetting agent.
According to the invention, the length of the telescopic connecting rod can be flexibly adjusted according to different acquisition position requirements by arranging the telescopic connecting rod on the integrated sensor, so that the sensor can accurately acquire the preset position signals. The integrated sensor is integrated with the wind speed and air quantity sensor, the temperature sensor and the humidity sensor, and can collect the wind speed and air quantity signals, the temperature signals and the humidity signals of the area at the same time, thereby being beneficial to comprehensively providing the data required by the experiment. Through having built-in wireless transmission antenna that has of integrated sensor to be connected with data processor through wireless mode, not only can simplify the step of transmission signal line wiring, can also be favorable to avoiding the occupation of transmission signal line to experimental space, be favorable to obtaining more accurate more comprehensive experimental data. Through setting up air inlet control system and dust emission system simultaneously at the air intake of test box, can simulate the different return air of tunneling working face and the dust circumstances of tunneling when the tunnel is tunneled through the cooperative control of two, and then can realize the simulation of underground working face environment. The recovery pond is assembled at the bottom of the test box body, so that the spray liquid can be recovered and stored in a centralized mode, the water resource recycling can be conveniently realized in the follow-up test process, and the water resource can be greatly saved. The pond apron lid with a plurality of hole that leaks is established in the upper opening end of retrieving the pond, not only can ensure the normal recovery operation of retrieving the pond to the spraying liquid, still is favorable to the maintenance personnel to stand on the pond apron and carries out the maintenance operation of experimental apparatus. The water level sensor is arranged in the recovery water tank, meanwhile, the water outlet is arranged at the bottom of the recovery water tank, and the water outlet is connected with the circulating water pump, so that the data processor can conveniently acquire liquid level data in the recovery water tank in real time, and further, the start-stop operation of the circulating water pump can be conveniently controlled according to the liquid level condition, and the recycling process of the collected spray liquid can be automatically realized. The water inlet end of the purification equipment is connected with an external high-pressure water source through an external water supply pipeline and is also connected with the water outlet end of the circulating water pump through a circulating water supply pipeline, and meanwhile, the first electromagnetic valve is arranged on the external water supply pipeline, and the second electromagnetic valve is arranged on the circulating water supply pipeline. And the solenoid valve III is arranged on each pressure-resistant pipeline, so that the work of part of atomizing nozzles can be selectively controlled, and different experimental requirements can be met. Through the setting of clarification plant, not only can purify outside high-pressure water source, can also purify the spray liquid that the recovery pond was retrieved, effectively ensured the quality of water that gets into atomizing nozzle in addition, because clarification plant can also change the composition of supplying water, the cooling dust fall effect of spray liquid when can simulate different additive filling better like this. Through the setting of control by temperature change equipment, can conveniently change the temperature of nozzle liquid water supply, like this, can be convenient for obtain the required spraying liquid temperature of experiment. Through the setting of water pressure control equipment, can conveniently change the spraying liquid water supply pressure, like this, can be convenient for obtain the required spraying liquid water supply pressure of experiment. The device simple structure, low in manufacturing cost, degree of automation are higher, and it can simulate the tunnelling environment in mine tunnel effectively, simultaneously, can carry out cooling dust fall operation with the integration, can also simulate different cooling dust fall conditions according to different experimental needs, is favorable to accurately and reliably obtaining the cooling dust fall data under the different operating modes, can provide reliable technical support for the integrated scheme of actual cooling dust fall, helps improving colliery safety in production level.
The invention also provides an experimental method for simulating intelligent spray cooling and dust falling of the underground tunnel of the coal mine, which adopts an experimental device for simulating intelligent spray cooling and dust falling of the underground tunnel of the coal mine, and comprises the following steps:
step one: setting up an experimental device;
s11: constructing a box-type frame 2 by utilizing a plurality of stainless steel pipes 2-1 and a plurality of steel pipe buckles 2-2;
s12: a recovery pond 8 is arranged at the bottom of the box-type frame 2, and a pond cover plate 7 is covered at the upper opening end of the recovery pond 8;
s13: sequentially dividing a plurality of cooling and dust-settling areas along the length direction in the inner space of the test box body 20 according to a set row distance, arranging an atomization unit in each cooling and dust-settling area, and installing three atomization nozzles 3 in each atomization unit at the top of each cooling and dust-settling area according to a set interval;
installing a plurality of integrated sensors 4 in the test box 20 according to the position to be experimentally monitored, and installing an air inlet control system 5 and a dust emission system 6 at the air inlet of the test box 20;
the purification equipment 11, the temperature control equipment 12 and the water pressure control equipment 13 are sequentially connected, the water inlet end of the purification equipment 11 is connected with a high-pressure water source, and the water outlet end of the water pressure control equipment 13 is respectively connected with the water inlet ends of the atomizing nozzles 3 through a plurality of pressure-resistant water pipes 10;
Step two: testing and adjusting an experimental device;
s21: closing the purification function of the purification equipment 11, closing the temperature regulation function of the temperature control equipment 12 and closing the pressure regulation function of the water pressure control equipment 13, so that the integrated circulating water supply system only has the function of communicating a high-pressure water source with the pressure-resistant water pipe 10, keeping the closing state of the air inlet control system 5 and the dust emission system 6, keeping the closing state of the electromagnetic valve II 17, opening the electromagnetic valve I16 and all the electromagnetic valves III 18, and flushing the integrated circulating water supply system, the pressure-resistant water pipes 10 and the atomizing nozzles 3 by using the high-pressure water source;
s22: the purification function of the purification equipment 11 is turned on, the temperature regulation function of the temperature control equipment 12 is turned on, the pressure regulation function of the water pressure control equipment 13 is turned on, the purification equipment 11 is utilized to purify the water supply of the spray liquid, the temperature control equipment 12 is utilized to regulate the water supply of the spray liquid to a set temperature, the water pressure control equipment 13 is utilized to regulate the water supply of the spray liquid to a set pressure, and then the treated water supply of the spray liquid is supplied to the atomizing nozzle 3 through the pressure-resistant water pipe 10 and is sprayed out through the atomizing nozzle 3 to form water mist;
s23: observing the spraying direction of the atomizing nozzles 3 under the windless condition, and adjusting the spraying direction of each atomizing nozzle 3 to be vertical and downward;
S24: the integrated sensor 4 is utilized to collect wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensor 4 is located in real time, the collected signals are processed and then sent to the data processor through the wireless transmission antenna 4-5, the data processor obtains wind speed and air volume data, temperature data and humidity data of the areas where the integrated sensor is located according to the received wind speed and air volume signals, temperature signals and humidity signals, and then the wind speed and air volume data, the temperature data and the humidity data are sent to the display to be displayed in real time;
by observing the data displayed on the display, whether each integrated sensor 4 works normally or not is judged, and the faulty integrated sensor 4 is replaced; the process is mainly judged by whether the data corresponding to each integrated sensor 4 is abnormal or not;
s25: closing the first electromagnetic valve 16, keeping the closing state of the second electromagnetic valve 17, keeping the stopping state of the circulating water pump, closing a water channel of the integrated circulating water supply system, opening the air inlet control system 5 and the dust emission system 6, providing a wind source for setting the wind speed and the temperature and the humidity by using the air inlet control system 5, and emitting dust with the lithology and the particle size by using the dust emission system 6;
The wind speed and air quantity signals, the temperature signals and the humidity signals of the areas where the integrated sensors 4 are located are collected through the integrated sensors 4 and are sent to the data processor, the data processor obtains wind speed and air quantity data, temperature data and humidity data of different areas according to the received signals and sends the wind speed and air quantity data, the temperature data and the humidity data to the display for real-time display, and the data displayed on the display are observed to judge whether the wind inlet control system 5 and the dust emission system 6 work normally or not, and the third step is executed after the normal operation is confirmed;
step three: perfecting an experimental device;
firstly, wrapping the outer surface of the main body of the box-type frame 2 by using a high-strength high-wear-resistance plastic film to isolate the part between the air inlet and the air outlet from the external environment, and then sequentially paving a double-layer vacuum heat-insulating glass layer 1-1 and a polyurethane foam board layer 1-2 on the outer surface of the main body of the box-type frame 2 to form a multi-layer protection structure for isolating air and temperature and humidity outside the main body of the box-type frame 2;
step four: starting a simulation experiment;
simulation experiment one:
s41: simulating a mine tunnel tunneling environment, opening an air inlet control system 5, setting temperature and humidity and air speed parameters of the air inlet, opening a dust emission system 6, setting lithology and particle size parameters of the dust, providing the air inlet with the air inlet control system 5 with the set air speed and temperature and humidity, and emitting the dust with the set lithology and particle size by the dust emission system 6;
The integrated sensor 4 is utilized to collect wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensor 4 is located in real time, the collected signals are processed and then sent to the data processor, the data processor obtains wind speed and air volume data, temperature data and humidity data of the areas where the integrated sensor is located according to the received wind speed and air volume signals, temperature signals and humidity signals, and then the wind speed and air volume data, the temperature data and the humidity data are sent to the display to be displayed in real time, and the process is continued for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
s42: opening the first electromagnetic valve 16, keeping the closing state of the second electromagnetic valve 17, and setting the water supply component, the water supply water temperature and the water supply water pressure of the spray liquid by adjusting parameters of the purifying equipment 11, the temperature control equipment 12 and the water pressure control equipment 13; the temperature and dust reduction operation under the following three working conditions is sequentially carried out: 1. the data processor is used for controlling a plurality of electromagnetic valves III 18 close to the left row to be opened, and the other electromagnetic valves III 18 are closed, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles 3 close to the left row in a plurality of atomizing units; 2. the data processor is used for controlling the opening of a plurality of electromagnetic valves III 18 in the middle row and closing the rest of the electromagnetic valves III 18, and cooling and dust-falling operations are carried out on a plurality of cooling and dust-falling areas through a plurality of atomizing nozzles 3 in the middle row in a plurality of atomizing units; 3. the data processor is used for controlling a plurality of electromagnetic valves III 18 close to the right row to be opened, and the other electromagnetic valves III 18 are closed, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles 3 close to the right row in a plurality of atomizing units; in the cooling and dust settling operation process of each working condition, the wind speed and air quantity signals, the temperature signals and the humidity signals of the areas where the integrated sensors 4 are positioned are collected, the wind speed and air quantity data, the temperature data and the humidity data of different areas are obtained by a data processor, and the influence relation of the three different spraying positions on the temperature, the humidity and the dust concentration of the different areas is obtained by the wind speed and air quantity data, the temperature data and the humidity data;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank 8, liquid level signals of the recovery water tank 8 are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank 8 according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls the electromagnetic valve II 17 to be opened, the circulating water pump 19 to start to work, meanwhile controls the electromagnetic valve I16 to be closed, the liquid recovered by the recovery water tank 8 is utilized to supply water to the integrated circulating water supply system, when the liquid level data is less than or equal to a lower limit value, the data processor controls the electromagnetic valve I16 to be opened, meanwhile controls the electromagnetic valve II 17 to be closed, controls the circulating water pump 19 to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
s43: opening the first electromagnetic valve 16 and all the third electromagnetic valves 18, keeping the closing state of the second electromagnetic valve 17, keeping the stopping state of the circulating water pump 19, sequentially changing the water supply components of spray liquid, the water supply temperature of the spray liquid and the water supply pressure of the spray liquid by adjusting the parameters of the purifying equipment 11, the temperature control equipment 12 and the water pressure control equipment 13, recording the adjusted parameters, in the process, utilizing all the atomizing nozzles 3 in a plurality of atomizing units to cool down and dust fall areas, utilizing each integrated sensor 4 to collect wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensors are positioned, utilizing a data processor to obtain wind speed and air volume data, temperature data and humidity data of different areas, and utilizing the recorded adjusting parameters, wind speed and air volume data, temperature data and humidity data to obtain the influence relation of different water supply components, different water supply temperatures, different water supply pressures to the temperatures, humidity and dust concentration of different areas;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank 8, liquid level signals of the recovery water tank 8 are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank 8 according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls the electromagnetic valve II 17 to be opened, the circulating water pump 19 to start to work, meanwhile controls the electromagnetic valve I16 to be closed, the liquid recovered by the recovery water tank 8 is utilized to supply water to the integrated circulating water supply system, when the liquid level data is less than or equal to a lower limit value, the data processor controls the electromagnetic valve I16 to be opened, meanwhile controls the electromagnetic valve II 17 to be closed, controls the circulating water pump 19 to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
simulation experiment II:
s51: firstly, simulating a mine tunnel environment, opening an air inlet control system 5, setting temperature, humidity and air speed parameters of air inlet, then simulating the working condition of spraying, cooling and dust falling in the mine, opening a first electromagnetic valve 16 and a third electromagnetic valve 18, keeping the closing state of a second electromagnetic valve 17, keeping the stopping state of a circulating water pump 19, setting the water supply components, water supply temperature and water supply pressure of spraying liquid by adjusting parameters of a purifying device 11, a temperature control device 12 and a water pressure control device 13, and performing cooling and dust falling operation on a plurality of cooling and dust falling areas by utilizing all atomizing nozzles 3 in a plurality of atomizing units; meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank 8, liquid level signals of the recovery water tank 8 are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank 8 according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls the electromagnetic valve II 17 to be opened, the circulating water pump 19 to start to work, meanwhile controls the electromagnetic valve I16 to be closed, the liquid recovered by the recovery water tank 8 is utilized to supply water to the integrated circulating water supply system, when the liquid level data is less than or equal to a lower limit value, the data processor controls the electromagnetic valve I16 to be opened, meanwhile controls the electromagnetic valve II 17 to be closed, controls the circulating water pump 19 to stop working, and the high-pressure water source is utilized to supply water to the integrated circulating water supply system;
The integrated sensor 4 is utilized to collect wind speed and air volume signals, temperature signals and humidity signals of the areas where the integrated sensor 4 is located in real time, the collected signals are processed and then sent to the data processor, the data processor obtains wind speed and air volume data, temperature data and humidity data of the areas where the integrated sensor is located according to the received wind speed and air volume signals, temperature signals and humidity signals, and then the wind speed and air volume data, the temperature data and the humidity data are sent to the display to be displayed in real time, and the process is continued for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
s52: the dust emission system 6 is opened, lithology and particle diameter parameters of dust are sequentially adjusted according to experimental requirements so as to simulate working conditions of tunneling rock bodies with different lithology, in the process, the adjusted parameters are recorded, wind speed and air quantity signals, temperature signals and humidity signals of areas where the integrated sensors 4 are positioned are collected, wind speed and air quantity data, temperature data and humidity data of different areas are obtained by the data processor, and the influence relationship of lithology and particle diameter of different dust on the temperature and humidity of different areas is obtained by the recorded adjusting parameters, wind speed and air quantity data, temperature data and humidity data;
Step five: the simulation experiment is completed;
dismantling and storing the experimental device to save the site space; and (3) arranging experimental data, and selecting the scheme with the optimal cooling and dust settling effects according to the experimental data.
Preferably, in step S42, the purifying apparatus has a magnetizing function, and the upper part thereof has a filling passage communicating with the internal water passage thereof, and the purifying apparatus changes the water supply composition by magnetizing the spray liquid water supply and adding the wetting agent. By adding different wetting agents, the wettability of water to dust can be effectively increased, so that the dust settling effect can be remarkably improved.
In the invention, before the simulation experiment is started, the pressure-resistant water pipe and the atomizing nozzle are washed, so that the interference of residual substances in the previous experiment process on the experimental data can be avoided. And then the spraying direction of each atomizing nozzle is adjusted downwards, and then a simulation experiment is started after the functions of each integrated sensor, the air inlet control system and the dust emission system are confirmed to be normal, so that more accurate experimental data can be obtained. For the box frame, the high-strength high-wear-resistance plastic film is firstly used for wrapping the outer surface of the box frame, and then a double-layer vacuum heat-insulating glass layer and a polyurethane foam board layer are sequentially paved outside the box frame, so that the influence of external environment can be effectively isolated, and the accuracy of experimental data is further ensured. In the cooling and dust settling experiment process, the spray liquid is recovered in real time by utilizing the recovery water tank, and the recovered water is supplied to the purification equipment by utilizing the circulating water pump, so that the cyclic utilization of water resources can be realized, and the water consumption consumed in the experiment process is saved. For the working condition that the wetting agent is added to the water flowing through the purification equipment in the experimental process, the mode of recycling the water in the recovery water tank can also effectively save the consumption of the wetting agent. The liquid level signal in the recovery pond is acquired in real time through the water level sensor, and the liquid level signal can be used as an action triggering condition, so that the data processor can automatically control the opening and closing actions of the first electromagnetic valve and the second electromagnetic valve and the starting and stopping actions of the circulating water pump, and the recovered liquid or an external water source can be automatically utilized as a spray liquid supply source. The data processor is used for controlling the opening and closing actions of a part of electromagnetic valves III so as to control the atomizing nozzles at different spraying positions to work, and the influence relation of different spraying positions on different area temperatures, humidity and dust attempts can be obtained through experiments. Through the regulation to the composition, temperature and the water pressure of supplying water, can obtain different water supply compositions, different water supply temperatures, different water supply pressure's influence relation to different regional temperature, humidity and dust concentration through the experiment. Through the adjustment of parameters of lithology and particle size of dust, the influence relationship of lithology and particle size of different dust on temperature and humidity of different areas can be obtained through experiments. The method has simple steps and low implementation cost, can integrally carry out the cooling and dust settling experiments in an analog simulation mode, can comprehensively and accurately acquire experimental data under different working conditions in multiple directions, and can provide reliable technical support for an integration scheme of actual cooling and dust settling.
Claims (8)
1. The experimental device for simulating intelligent spray cooling and dust settling of the underground roadway of the coal mine comprises a test box body (20), wherein the length direction of the test box body (20) extends along the front-back direction, the front end and the back end of the test box body are open, the front end of the test box body is used as an air outlet, and the back end of the test box body is used as an air inlet; the device is characterized by further comprising an atomization unit, an integrated sensor (4), an air inlet control system (5), a dust emission system (6), a recovery water tank (8), a water tank cover plate (7), a water level sensor, an integrated circulating water supply system and a data processor;
the inner space of the test box body (20) is provided with a plurality of cooling and dust-settling areas along the length direction;
the number of the atomizing units is in one-to-one correspondence with the number of the cooling and dust falling areas, each atomizing unit consists of three atomizing nozzles (3) positioned in the test box body (20), and the three atomizing nozzles (3) are respectively arranged at the left part, the middle part and the right part of the top end of the area;
the integrated sensor (4) is located inside the test box body (20), the integrated sensor (4) comprises a telescopic connecting rod (4-1), a sensor mounting rack (4-6), a wind speed and air quantity sensor (4-2), a temperature sensor (4-3), a humidity sensor (4-4), a data processor, a data storage module, a wireless transmission antenna (4-5) and a waterproof and dustproof shell, the telescopic connecting rod (4-1) is vertically arranged, the upper end of the telescopic connecting rod is connected with a top plate of the test box body (20), the sensor mounting rack (4-6) is located in the middle of the height direction of the test box body (20) and is fixedly connected to the lower end of the telescopic connecting rod (4-1), the wind speed and air quantity sensor (4-2), the temperature sensor (4-3) and the humidity sensor (4-4) are all installed on a sensor support, the data processor and the data storage module are installed in a waterproof and dustproof shell, the wireless transmission antenna (4-5) is installed outside the waterproof and dustproof shell, the waterproof shell is installed on the waterproof and the data processor (4-2), the wind speed sensor mounting rack (4-3) and the humidity sensor (4-4) are respectively installed on the wind speed and the temperature sensor (4-2) The data storage module is connected with the wireless transmission antenna (4-5); the integrated sensors (4) are sequentially arranged in the center part of the inner space of the test box body (20) along the length direction of the test box body (20) and are used for collecting wind speed and air quantity signals, temperature signals and humidity signals of the respective areas in real time, processing the collected signals and transmitting the processed signals to external equipment through the wireless transmission antenna (4-5);
The air inlet control system (5) is arranged at the air inlet and is used for providing an air source for the inside of the test box body (20) and adjusting the air inlet speed, the air inlet temperature and the air inlet humidity;
the dust emission system (6) is arranged at the air inlet and is used for emitting dust into the test box body (20) and adjusting the particle size and lithology of the generated dust;
the size of the recovery water tank (8) is matched with the size of the inside of the test box body (20), and the recovery water tank is fixedly arranged at the bottom side of the inside of the test box body (20) and is used for collecting and storing spray liquid; a water outlet (9) is formed in the bottom of the recovery water tank (8), and the water outlet (9) is connected with the water inlet end of an external circulating water pump (19) through a communication pipeline;
the water tank cover plate (7) is a grid plate with a plurality of water leakage holes distributed on the surface, the size of the grid plate is matched with the size of the upper opening end (8) of the recovery water tank (8), and the grid plate is covered on the upper opening end of the recovery water tank (8);
the water level sensor is arranged in the recovery water tank (8) and is used for collecting a liquid level signal in the recovery water tank (8) in real time and sending the liquid level signal to external equipment;
the integrated circulating water supply system comprises a purifying device (11), a temperature control device (12) and a water pressure control device (13), wherein the purifying device (11) is used for purifying spray liquid water supply and changing water supply components of the spray liquid, the water inlet end of the purifying device (11) is connected with an external high-pressure water source through an external water supply pipeline (14) and is also connected with the water outlet end of a circulating water pump (19) through a circulating water supply pipeline (15), the temperature control device (12) is used for adjusting the water supply temperature of the spray liquid, the water inlet end of the temperature control device (12) is connected with the water outlet end of the purifying device (11), the water outlet end of the temperature control device is connected with the water inlet end of the water pressure control device (13), the water pressure control device (13) is used for adjusting the water supply pressure of the spray liquid, and the water pressure control device (13) is respectively connected with the water inlet ends of a plurality of atomizing nozzles (3) through a plurality of pressure-resistant water pipes (10). The external water supply pipeline (14) is connected with a first electromagnetic valve (16) in series; the circulating water supply pipeline (15) is connected with a solenoid valve II (17) in series; each pressure-resistant water pipe (10) is connected in series with a solenoid valve III (18);
The data processor is internally provided with a wireless communication module and is connected with a plurality of integrated sensors (4) in a wireless mode, and the output end of the data processor is respectively connected with an air inlet control system (5), a dust emission system (6), a water level sensor, a purifying device (11), a temperature control device (12), a water pressure control device (13), a display, a circulating water pump (19), a first electromagnetic valve (16), a second electromagnetic valve (17) and a plurality of third electromagnetic valves (18).
2. The experimental device for simulating intelligent spray cooling and dust settling of the underground roadway of the coal mine according to claim 1, wherein the experimental box body (20) is composed of a box-type frame (2) and a heat-insulating and air-insulating cover body (1) wrapped outside the box-type frame (2), the heat-insulating and air-insulating cover body (1) is of a double-layer structure, the inner layer is a double-layer vacuum heat-insulating glass layer (1-1), and the outer layer is a polyurethane foam board layer (1-2).
3. The experimental device for simulating intelligent spray cooling and dust settling of underground coal mine roadway according to claim 1 or 2, wherein the box-type frame (2) is composed of a plurality of stainless steel pipes (2-1) and steel pipe buckles (2-2) for connecting adjacent stainless steel pipes (2-1).
4. An experimental device for simulating intelligent mist cooling and dust settling of a coal mine underground roadway according to claim 3, wherein the data processor is an industrial computer.
5. The experimental device for simulating intelligent spray cooling and dust settling of a coal mine underground roadway according to claim 4, wherein the recovery water tank (8) is a folding water tank.
6. The experimental device for simulating intelligent spray cooling and dust settling of a coal mine underground roadway according to claim 5, wherein the pressure-resistant water pipe (10) can bear water pressure of 10 MPa.
7. An experimental method for simulating intelligent spray cooling and dust settling of a coal mine underground roadway, which adopts the experimental device for simulating intelligent spray cooling and dust settling of the coal mine underground roadway according to any one of claims 1 to 6, and is characterized by comprising the following steps:
step one: setting up an experimental device;
s11: constructing a box-type frame (2) by utilizing a plurality of stainless steel pipes (2-1) and a plurality of steel pipe buckles (2-2);
s12: a recovery water tank (8) is arranged at the bottom of the box-type frame (2), and a water tank cover plate (7) is covered at the upper opening end of the recovery water tank (8);
s13: sequentially dividing a plurality of cooling and dust-settling areas along the length direction in the inner space of the test box body (20) according to a set row distance, arranging an atomization unit in each cooling and dust-settling area, and installing three atomization nozzles (3) in each atomization unit at the top of each cooling and dust-settling area according to a set interval;
Installing a plurality of integrated sensors (4) in the test box body (20) according to the position to be tested and monitored, and installing an air inlet control system (5) and a dust emission system (6) at the air inlet of the test box body (20);
the purification equipment (11), the temperature control equipment (12) and the water pressure control equipment (13) are sequentially connected, the water inlet end of the purification equipment (11) is connected with a high-pressure water source, and the water outlet end of the water pressure control equipment (13) is respectively connected with the water inlet ends of the atomizing nozzles (3) through a plurality of pressure-resistant water pipes (10);
step two: testing and adjusting an experimental device;
s21: closing the purification function of the purification equipment (11), closing the temperature regulation function of the temperature control equipment (12) and closing the pressure regulation function of the water pressure control equipment (13), so that the integrated circulating water supply system only has the function of communicating a high-pressure water source with the pressure-resistant water pipe (10), keeping the closing state of the air inlet control system (5), keeping the closing state of the dust emission system (6), keeping the closing state of the electromagnetic valve II (17), opening the electromagnetic valve I (16) and all the electromagnetic valves III (18), and flushing the integrated circulating water supply system, the pressure-resistant water pipes (10) and the atomizing nozzles (3) by using the high-pressure water source;
s22: opening a purification function of the purification equipment (11), opening a temperature regulation function of the temperature control equipment (12) and opening a pressure regulation function of the water pressure control equipment (13), purifying the water supply of the spray liquid by the purification equipment (11), regulating the water supply of the spray liquid to a set temperature by the temperature control equipment (12), regulating the water supply of the spray liquid to a set pressure by the water pressure control equipment (13), supplying the treated water supply of the spray liquid to the atomizing nozzle (3) through the pressure-resistant water pipe (10), and spraying the treated water supply of the spray liquid to form water mist through the atomizing nozzle (3);
S23: observing the spraying direction of the atomizing nozzles (3) under the windless condition, and adjusting the spraying direction of each atomizing nozzle (3) to be vertical and downward;
s24: the method comprises the steps of acquiring wind speed and air volume signals, temperature signals and humidity signals of areas where the wind speed and air volume signals are located in real time by using an integrated sensor (4), processing the acquired signals, then sending the processed signals to a data processor through a wireless transmission antenna (4-5), acquiring wind speed and air volume data, temperature data and humidity data of the areas where the wind speed and air volume signals, the temperature signals and the humidity signals are located by the data processor according to the received wind speed and air volume signals, and then sending the wind speed and air volume data, the temperature data and the humidity data to a display for real-time display;
by observing the data displayed on the display, judging whether each integrated sensor (4) works normally or not, and replacing the faulty integrated sensor (4);
s25: closing the first electromagnetic valve (16), keeping the closing state of the second electromagnetic valve (17), keeping the stopping state of the circulating water pump, closing a water channel of the integrated circulating water supply system, opening the air inlet control system (5) and the dust emission system (6), providing a wind source for setting the wind speed and the temperature and humidity by using the air inlet control system (5), and emitting dust with the lithology and the particle size by using the dust emission system (6);
Acquiring wind speed and air quantity signals, temperature signals and humidity signals of the areas where the integrated sensors (4) are located through the integrated sensors, sending the signals to a data processor, acquiring wind speed and air quantity data, temperature data and humidity data of different areas according to the received signals by the data processor, sending the data to a display for real-time display, and judging whether an air inlet control system (5) and a dust emission system (6) work normally or not through observing the data displayed on the display, and executing the third step after confirming the normal operation;
step three: perfecting an experimental device;
firstly, wrapping the outer surface of a box-type frame (2) main body by using a high-strength high-wear-resistance plastic film to isolate a part between an air inlet and an air outlet from the external environment, and then sequentially paving a double-layer vacuum heat-insulating glass layer (1-1) and a polyurethane foam board layer (1-2) on the outer surface of the box-type frame (2) main body to form a multi-layer protection structure for isolating air and temperature and humidity outside the box-type frame (2) main body;
step four: starting a simulation experiment;
simulation experiment one:
s41: simulating a mine tunnel tunneling environment, opening an air inlet control system (5) and setting temperature, humidity and air speed parameters of air inlet, opening a dust emission system (6) and setting lithology and particle size parameters of dust, providing the air inlet with the air inlet control system (5) with the set air speed and temperature, and emitting the dust with the set lithology and particle size by the dust emission system (6);
The method comprises the steps of acquiring wind speed and air volume signals, temperature signals and humidity signals of areas where the wind speed and air volume signals are located in real time by using an integrated sensor (4), processing the acquired signals and then sending the processed signals to a data processor, acquiring wind speed and air volume data, temperature data and humidity data of the areas where the wind speed and air volume signals, the temperature signals and the humidity signals are located by the data processor according to the received wind speed and air volume signals, sending the wind speed and air volume data, the temperature data and the humidity data to a display for real-time display, and continuing the process for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
s42: opening the first electromagnetic valve (16), keeping the closing state of the second electromagnetic valve (17), and setting the water supply component, the water supply water temperature and the water supply water pressure of the spray liquid by adjusting parameters of the purifying equipment (11), the temperature control equipment (12) and the water pressure control equipment (13); the temperature and dust reduction operation under the following three working conditions is sequentially carried out: 1. the data processor is used for controlling a plurality of electromagnetic valves III (18) close to the left row to be opened, and the rest electromagnetic valves III (18) close to the left row, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles (3) close to the left row in a plurality of atomizing units; 2. the data processor is used for controlling the opening of a plurality of electromagnetic valves III (18) in the middle row and closing the rest of the electromagnetic valves III (18), and the plurality of cooling and dust-settling areas are subjected to cooling and dust-settling operations through a plurality of atomizing nozzles (3) in the middle row in the plurality of atomizing units; 3. the data processor is used for controlling a plurality of electromagnetic valves III (18) close to the right row to be opened, and the rest electromagnetic valves III (18) are closed, so that cooling and dust-settling operations are carried out on a plurality of cooling and dust-settling areas through a plurality of atomizing nozzles (3) close to the right row in a plurality of atomizing units; in the cooling and dust settling operation process of each working condition, the wind speed and air quantity signals, the temperature signals and the humidity signals of the areas where the integrated sensors (4) are positioned are collected, the wind speed and air quantity data, the temperature data and the humidity data of different areas are obtained by a data processor, and the influence relation of the wind speed and air quantity data, the temperature data and the humidity data of three different spraying positions on the temperature, the humidity and the dust concentration of different areas is obtained by the data processor;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank (8), liquid level signals of the recovery water tank (8) are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank (8) according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls a solenoid valve II (17) to be opened, a circulating water pump (19) to start to work, a solenoid valve I (16) is controlled to be closed, the liquid recovered by the recovery water tank (8) is used for supplying water to an integrated circulating water supply system, and when the liquid level data is less than or equal to a lower limit value, the data processor controls the solenoid valve I (16) to be opened, and simultaneously controls the solenoid valve II (17) to be closed, and controls the circulating water pump (19) to stop working and a high-pressure water source to supply water to the integrated circulating water supply system;
s43: opening a first electromagnetic valve (16) and all electromagnetic valves (18), keeping a second electromagnetic valve (17) in a closed state, keeping a shut-down state of a circulating water pump (19), sequentially changing the water supply components of spray liquid, the water supply temperature of the spray liquid and the water supply pressure of the spray liquid by adjusting parameters of a purifying device (11), a temperature control device (12) and a water pressure control device (13), recording the adjusted parameters, wherein in the process, all atomizing nozzles (3) in a plurality of atomizing units are utilized to cool down and dust fall areas, each integrated sensor (4) is utilized to collect wind speed and air quantity signals, temperature signals and humidity signals of the areas, a data processor is utilized to obtain wind speed and air quantity data, temperature data and humidity data of different areas, and the recorded adjusting parameters, wind speed and air quantity data, temperature data and humidity data are utilized to obtain the influence relation of different water supply components, different water supply temperatures and different water supply pressures on the temperatures, humidity and dust concentration of different areas;
Meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank (8), liquid level signals of the recovery water tank (8) are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank (8) according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls a solenoid valve II (17) to be opened, a circulating water pump (19) to start to work, a solenoid valve I (16) is controlled to be closed, the liquid recovered by the recovery water tank (8) is used for supplying water to an integrated circulating water supply system, and when the liquid level data is less than or equal to a lower limit value, the data processor controls the solenoid valve I (16) to be opened, and simultaneously controls the solenoid valve II (17) to be closed, and controls the circulating water pump (19) to stop working and a high-pressure water source to supply water to the integrated circulating water supply system;
simulation experiment II:
s51: firstly, simulating a mine tunnel environment, opening an air inlet control system (5) and setting temperature, humidity and air speed parameters of air inlet, then simulating the working condition of spraying, cooling and dust falling in the mine, opening a first electromagnetic valve (16) and a third electromagnetic valve (18), keeping the closing state of the second electromagnetic valve (17), keeping the stopping state of a circulating water pump (19), setting the water supply components, water supply temperature and water supply pressure of spraying liquid by adjusting the parameters of a purifying device (11), a temperature control device (12) and a water pressure control device (13), and performing cooling and dust falling operation on a plurality of cooling and dust falling areas by utilizing all atomizing nozzles (3) in a plurality of atomizing units; meanwhile, the sprayed liquid is recovered by utilizing the recovery water tank (8), liquid level signals of the recovery water tank (8) are collected in real time through a water level sensor and are sent to a data processor in real time, the data processor obtains liquid level data of the recovery water tank (8) according to the received liquid level signals, when the liquid level data is more than or equal to an upper limit value, the data processor controls a solenoid valve II (17) to be opened, a circulating water pump (19) to start to work, a solenoid valve I (16) is controlled to be closed, the liquid recovered by the recovery water tank (8) is used for supplying water to an integrated circulating water supply system, and when the liquid level data is less than or equal to a lower limit value, the data processor controls the solenoid valve I (16) to be opened, and simultaneously controls the solenoid valve II (17) to be closed, and controls the circulating water pump (19) to stop working and a high-pressure water source to supply water to the integrated circulating water supply system;
The method comprises the steps of acquiring wind speed and air volume signals, temperature signals and humidity signals of areas where the wind speed and air volume signals are located in real time by using an integrated sensor (4), processing the acquired signals and then sending the processed signals to a data processor, acquiring wind speed and air volume data, temperature data and humidity data of the areas where the wind speed and air volume signals, the temperature signals and the humidity signals are located by the data processor according to the received wind speed and air volume signals, sending the wind speed and air volume data, the temperature data and the humidity data to a display for real-time display, and continuing the process for a period of time until the wind speed and air volume data, the temperature data and the humidity data observed by the display are stable;
s52: the dust emission system (6) is opened, lithology and particle diameter parameters of dust are sequentially adjusted according to experimental requirements so as to simulate working conditions of tunneling rock bodies with different lithology, in the process, the adjusted parameters are recorded, wind speed and air quantity signals, temperature signals and humidity signals of areas where the dust emission system is positioned are collected by utilizing each integrated sensor (4), wind speed and air quantity data, temperature data and humidity data of different areas are obtained by utilizing a data processor, and the influence relation of lithology and particle diameter of different dust on the temperature and humidity of different areas is obtained by utilizing the recorded adjusting parameters, wind speed and air quantity data, temperature data and humidity data;
Step five: the simulation experiment is completed;
dismantling and storing the experimental device to save the site space; and (3) arranging experimental data, and selecting the scheme with the optimal cooling and dust settling effects according to the experimental data.
8. The experimental method for simulating intelligent spraying cooling and dust settling of underground tunnel of coal mine according to claim 7, wherein in the step S42, the purifying device (11) has a magnetizing function, the upper part of the purifying device is provided with a filling channel communicated with the internal water channel, and the purifying device (11) changes the water supply composition by magnetizing the sprayed water supply and adding the wetting agent.
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