CN113063904A - Multi-field coupling test device and method for simulating deep mining Ordovician limestone gushing water - Google Patents
Multi-field coupling test device and method for simulating deep mining Ordovician limestone gushing water Download PDFInfo
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Abstract
The invention discloses a multi-field coupling test device and method for simulating deep mining Ordovician limestone gushing water, and mainly relates to the field of coal mine goaf disaster prevention and control. The testing method comprises the steps of establishing rock stratum models with different proportions, different structures or different distributions according to actual geological conditions of a coal mine, simulating various conditions such as deep ground stress, bottom plate water pressure, rock stratum temperature and mining disturbance through the testing device, recording various measurement data in the testing process, and generating the bottom plate ash inrush phenomenon and the path of a deep mining coal bed. The testing device provided by the invention has the advantages of simple structure, convenience in maintenance, accurate monitoring data, scientific testing method principle and simplicity and convenience in operation, meets the teaching task and test exploration of the Olympic Grey Water inrush mechanism by simulating and analyzing the characteristics and mechanism of Olympic Grey Water inrush in deep mining, and provides effective testing data for Olympic Grey Water inrush prevention and control and safe mining of coal mines.
Description
Technical Field
The invention belongs to the field of disaster prevention and control of coal mine goafs, and particularly relates to a multi-field coupling test device and method mainly used for simulating deep mining of Ordovician limestone gushing water.
Background
Coal resources account for more than 58% in the energy structure of China, and the development of economy and society of China is guaranteed and influenced, so that safe and efficient exploitation and utilization of the coal resources are the most important in economic development of China and a difficult task influencing the national civilization of China. Along with the gradual depletion of shallow resources of the northChina molded coal field in the eastern area, the mine gradually steps into the exploitation stage of deep resources. Compared with shallow mining of a mine, deep mining has the characteristics of high stress, high pressure bearing, high ground temperature and violent disturbance, which causes various disasters, especially floor water inrush in coal mining. Under the strong disturbance additional property derived from large-scale high-level mining of deep coal and the high water pressure driving of the bottom plate, the frequent occurrence of water bursting disasters of the bottom plate becomes a prominent problem which restricts the safe, high-efficiency and green mining of the deep coal.
The bottom plate water-bearing stratum threatening the mine safety is mainly an Ordovician huge thick limestone water-bearing stratum. The Ordovician limestone aquifer has strong water-rich property, large thickness and rich water quantity, and is not suitable for dredging during mining. Once the water inrush accident of the Ordovician grey water occurs, the water inrush can submerge the whole working surface in a very short time, even fill the whole mine, have very large impact force and destructive power, and the water inrush is difficult to be discharged in a short time, so that the rescue work can not be organized and developed quickly. According to incomplete statistics, more than 230 mines in the north China coal field are threatened by the Aohu water to different degrees, so that not only are serious economic losses and casualties caused, but also adverse social effects are caused.
Theoretical researchers and practical production personnel for preventing and controlling water disaster of coal mines in China are always dedicated to the research on preventing and controlling water disaster of coal mines. Various researches show that the water inrush disaster of the Aohu water is caused by the combined action of coal mine engineering geological conditions, hydrogeological conditions and mining influence, and the water inrush mechanism is very complex. At present, many test means at home and abroad cannot well simulate the deep Aohu water inrush process, most researchers develop research on the basis of a numerical model, and test results cannot be obtained visually. In addition, combining graphics and text or audio in teaching practice cannot fully satisfy the daily teaching task. The experimental exploration is inevitably not established in the actual occurrence of the Ordovician limestone water disaster, a large amount of manpower, material resources and financial resources are consumed for the experiment on a coal mine site, a few of the existing experimental devices can simulate the water inrush of a bottom plate, but the conditions of rock stratum structure, pressure bearing water pressure, temperature coupling and the like cannot be completely met aiming at the research of the Ordovician limestone water inrush, and the experimental result has a larger difference compared with the research theory. Therefore, the multi-field coupling test device and method for simulating deep mining of Ordovician limestone gushing water are designed, and the device and method have very important practical significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and seeks to design a multi-field coupling test device for simulating deep mining Ordovician limestone water inrush, which has a simple structure, meets the teaching task and test research of the Ordovician limestone water inrush mechanism by simulating and analyzing the Ordovician limestone water inrush characteristics and mechanism of coal bed bottom plates with different proportions, different structures and different distributions under the multi-field coupling condition, and provides effective test data for the research of the Ordovician limestone water inrush mechanism.
The invention also aims to provide a multi-field coupling test method for simulating deep mining Ordovician limestone gushing water.
The purpose of the invention is realized by the following technical scheme:
a multi-field coupling test device for simulating deep mining Ordovician limestone gushing water comprises an Ordovician limestone water-containing layer system, a fixing plate, an equipment plate, a hydraulic monitoring system, a temperature control system, a tension loader, a hydraulic servo loader, a piston, a variable-frequency disturbance simulation system, a noise reduction night vision monitoring system, a top loading plate, a hydraulic jack, a lateral thermal module loading plate, a transverse screw and a nut; the fixing plate is connected with the equipment plate through a transverse screw and is fixed by a nut, and the fixing plate can move back and forth to realize the full restraint of the Ordovician limestone water-containing layer system; the hydraulic monitoring system can record the water pressure of the aquifer changed at each part under the stress action in real time; the temperature control system records the temperature change of the Ordovician limestone water-containing layer system in real time and regulates and controls the heating power of the lateral thermal module loading plate; the tension loader is positioned on two sides of the middle part of the equipment plate and is connected with the piston through a traction rope for loading, and the displacement of the piston is automatically recorded in real time by a data acquisition system in the tension loader; the hydraulic servo loader has multiple loading modes of displacement and force control; the variable-frequency disturbance simulation system is arranged in an equipment plate area corresponding to the middle of the goaf, and the top end and the side surface of the vibrating rod are in close contact with the surface of the rock stratum; the noise-reduction night vision monitoring system is arranged in an equipment board area at the upper part of the goaf, and the camera is fixed in the goaf; the upper end surface of the top loading plate is connected with the hydraulic servo loader, and the lower end surface of the top loading plate is contacted with steel balls distributed on the upper loading surface of the rock stratum model to transmit uniform load to the rock stratum model; the hydraulic jack is in contact with the lateral thermal module loading plate through the fixator, and when the hydraulic jack works, the lateral thermal module loading plate loads the left end face and the right end face of the Ordovician limestone aquifer system so as to simulate the loading effect of lateral tectonic stress on the stratum.
Furthermore, the Ordovician limestone aquifer system adjusts the depth of the aquifer by changing the thickness of the bottom, can be fixed in the device after modeling is finished by pouring in layers in advance according to an actual mine design test rock stratum model, can build a collapse column and a fault inside, and realizes simulation analysis on rock strata with different proportions, different structures and different distributions.
Furthermore, the variable-frequency disturbance simulation system can adjust the vibration frequency and intensity, and can select vibrating rods with different lengths and radiuses to carry out disturbance of different degrees on goafs with different mining distances, so that the transmission of far-field and near-field micro-shocks is realized.
Furthermore, the noise-reduction night vision monitoring system can shoot under the dark light condition without generating red exposure, record the images of the goaf in real time and transmit the images to the cloud, and support remote checking of multiple devices.
Furthermore, the hydraulic monitoring system and the temperature control system are provided with a plurality of sensing pieces, can be placed at different depths of a water-bearing stratum, can be attached to the surface of a rock stratum model closely, monitor and record the pressure or temperature at different positions in real time, automatically generate a data chart, and upload the data chart to a cloud for storage.
Furthermore, the matrix distributed PTC ceramic heating system is installed in the lateral hot module loading plate, the heating speed is high, the heating is uniform and continuous, the temperature can be controlled in a partitioned mode, and the temperature of a plurality of positions of the Ordovician limestone water-containing layer system is adjusted, so that the influences of the temperature on the ground stress distribution and the engineering mechanical properties of rock masses are explored.
A multi-field coupling test method for simulating deep mining Ordovician limestone gushing water is applied to the multi-field coupling test device for simulating deep mining Ordovician limestone gushing water, and comprises the following steps:
1) designing a mine rock stratum structure which is actually explored into a rock stratum model according to a certain proportion, placing a temperature sensing piece and a hydraulic sensing piece at the position of the rock stratum model which needs to be measured and in a water-bearing stratum, then placing the rock stratum model on the upper part of the water-bearing stratum of the device by clinging to an equipment plate, moving a fixing plate by a transverse screw rod to be tightly contacted with the rock stratum model, and screwing a nut;
2) placing a top loading plate on the upper surface of the rock stratum model, starting a hydraulic servo loader and a hydraulic jack, and setting vertical pressure F required by the test1And lateral pressure F2；
3) Starting the temperature control system, and setting the temperature T of five subareas of the rock stratum model required by the test1、T2、T3、T4、T5The lateral thermal module loading plate heats the rock stratum model to enable the temperature of each region of the rock stratum model monitored by the temperature control system to reach the set temperature;
4) starting a variable frequency disturbance simulation system, setting the vibration frequency and the strength of a vibrating rod to enable the vibrating rod to meet the disturbance condition required by the test, then starting a noise reduction night vision monitoring system, and observing the picture inside the goaf of the rock stratum model in real time through a display screen;
5) the method comprises the following steps of starting a tension loader, moving a piston through a traction rope to compress aquifer liquid, recording the displacement S of the piston by the tension loader, enabling the aquifer liquid to be pressed to flow into a goaf through a hole or a fault or a collapse column in a rock stratum model, respectively recording the hydraulic pressure P and the temperature T of a position where a sensing sheet is located by a hydraulic monitoring system and a temperature control system, observing the water inrush phenomenon in the goaf through a display screen, determining the water inrush occurrence time, and observing the water inrush process and degree;
6) unloading the hydraulic servo loader and the hydraulic jack, deriving various measurement data in the test process, turning off a power supply of the equipment, loosening the nut, detaching the fixed plate, taking out the rock stratum model, and observing the water inrush path of the rock stratum model.
The multi-field coupling test method for simulating deep mining of Ordovician limestone flooding as described above, wherein in step 3), the step of heating the rock stratum model by the lateral thermal module loading plate to enable the temperature of each region of the rock stratum model monitored by the temperature control system to reach the set temperature further comprises the following steps: the temperature control system controls the heating power of the lateral thermal module loading plate in real time, when the temperature is higher than a set temperature by a certain value, the heating power is reduced, and when the temperature is lower than the set temperature by a certain value, the heating power is increased, so that the temperature of the rock stratum model is always kept in a certain interval of the set temperature.
Compared with the prior art, the invention has the following advantages:
compared with the prior art, the multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water is highly intelligent, all monitoring data are automatically recorded and generated, a chart is uploaded to a cloud for storage, and a goaf picture can be remotely viewed on line in real time by multiple devices; secondly, supporting the elastic water-proof foundation around the Ordovician limestone water-containing layer system, and tightly contacting the elastic water-proof foundation with the Ordovician limestone water-containing layer system under the constraint of a fixed plate and a loading plate, so that the sealing and the water resistance between the test device and the Ordovician limestone water-containing layer system are ensured; thirdly, the test phenomenon is easy to observe, colored and hardly permeable liquid is added into the Ordovician limestone water-bearing stratum system through a water injection port, and the water inrush path and the water inrush degree can be visually displayed; fourthly, the design is rigorous, the three-high one-disturbance characteristic that deep mining has high stress, high bearing pressure, high ground temperature and severe disturbance is met, a power control system adopts a hydraulic servo device, the high stress of a deep rock stratum is realized through an all-directional loading plate, the high bearing pressure is realized by pulling a piston through a tension loader, the high ground temperature is realized through a matrix distributed PTC ceramic heating plate, the severe disturbance is realized through a variable frequency disturbance simulation system, and the universal guiding significance is provided for the research on the AoHui water inrush process, characteristics and mechanism under multi-field coupling; fifthly, the device has the advantages of simple structure, scientific principle, convenient maintenance and accurate monitoring data, realizes the Ordovician limestone water inrush process of rock stratum models with different proportions, different structures and different distributions under the indoor simulation of multi-field coupling conditions, meets the teaching task and test exploration of the Ordovician limestone water inrush mechanism, and provides effective test data for Ordovician limestone water inrush prevention and control and safe mining of coal mines.
The invention relates to a multi-field coupling test method for simulating deep mining of Ordovician limestone gushing water, which comprises the steps of firstly, testing a rock stratum model according to an actual mine design, placing the rock stratum model on the upper part of a water-bearing stratum of a device by clinging to an equipment plate, moving a fixing plate to be in contact with the rear end face of the rock stratum model through a transverse screw rod, and constraining the boundary of the rock stratum model by screwing a nut; the hydraulic servo loader applies vertical force F to the loading surface of the rock stratum model through a top loading plate and steel balls1The hydraulic jack applies lateral force F to the left end face and the right end face of the rock stratum model through the lateral thermal module loading plate2The internal pressure bearing P of the rock stratum model is increased by drawing a piston through a tension loader arranged on an equipment plate, the rock stratum model is disturbed by a variable-frequency disturbance simulation system, and the rock stratum model is heated to reach the temperature T by a matrix distributed PTC ceramic heating system in a lateral thermal module loading plate; after observing the water inrush phenomenon inside the goaf through the display screen, determining the water inrush occurrence time, observing the water inrush process and degree, unloading the hydraulic servo loader and the hydraulic jack, deriving various measurement data of the test process, turning off the power supply of the equipment, loosening the nut, dismounting the fixing plate, taking out the rock stratum model, and observing the water inrush path of the rock stratum model. The test method can accurately realize the three-high-one disturbance characteristics of high stress, high pressure bearing, high ground temperature and severe disturbance when the Ordovician limestone water burst occurs in the rock stratum model, is convenient and simple to operate, has high data measurement efficiency, can meet the teaching task and test exploration of the Ordovician limestone water burst mechanism by combining engineering practice, provides effective test data for the prevention and control of the Ordovician limestone water burst and the safe mining of coal mines, and has great implementation value and social and economic benefits.
Drawings
FIG. 1 is a schematic diagram of the principle of the main structure of the multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water according to the present invention
FIG. 2 is a three-dimensional axial diagram of the main body structure of the multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water
FIG. 3 is a three-dimensional top view of the main structure of the multi-field coupling test device for simulating deep mining Ordovician limestone gushing water according to the present invention
In the figure: 1. the device comprises a fixing plate, 2, an equipment plate, 3, a hydraulic monitoring system, 4, a temperature control system, 5, a tension loader, 6, a hydraulic servo loader, 7, a piston, 8, a frequency conversion disturbance simulation system, 9, a noise reduction night vision monitoring system, 10, a top loading plate, 11, a hydraulic jack, 12, a lateral thermal module loading plate, 13, a transverse screw rod and 14, a nut.
Detailed Description
The present invention will be further described by way of examples with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
1. A multi-field coupling test device for simulating deep mining Ordovician limestone gushing water comprises an Ordovician limestone water-bearing layer system, a fixing plate 1, an equipment plate 2, a hydraulic monitoring system 3, a temperature control system 4, a tension loader 5, a hydraulic servo loader 6, a piston 7, a variable-frequency disturbance simulation system 8, a noise reduction night vision monitoring system 9, a top loading plate 10, a hydraulic jack 11, a lateral thermal module loading plate 12, a transverse screw 13 and a nut 14; the hydraulic servo loader 6 has multiple loading modes of displacement and force control; the upper end surface of the top loading plate 10 is connected with the hydraulic servo loader 6, and the lower end surface of the top loading plate is contacted with steel balls distributed on the upper loading surface of the rock stratum model to transmit uniform load to the rock stratum model; the tension loader 5 is positioned on two sides of the middle part of the equipment plate 2 and is connected with the piston 7 for loading through a traction rope, and the displacement of the piston 7 is automatically recorded in real time by a data acquisition system in the tension loader 5; the hydraulic monitoring system 3 can record the water pressure of the aquifer changed at each part under the stress action in real time; the temperature control system 4 records the temperature change of the Ordovician limestone water-containing layer system in real time and regulates and controls the heating power of the lateral thermal module loading plate 12; the hydraulic jack 11 is in contact with the lateral thermal module loading plate 12 through a fixer, and when the hydraulic jack 11 works, the lateral thermal module loading plate 12 loads the left end face and the right end face of the Ordovician limestone aquifer system so as to simulate the loading action of lateral tectonic stress on the stratum; the variable-frequency disturbance simulation system 8 is arranged in an equipment plate area corresponding to the middle of the goaf, and the top end and the side surface of the vibrating rod are in close contact with the surface of the rock stratum; the noise-reduction night vision monitoring system 9 is arranged in an equipment board area at the upper part of the goaf, and the camera is fixed in the goaf; the fixing plate 1 is connected with the equipment plate 2 through a transverse screw 13 and fixed by a nut 14, and the fixing plate 1 can move back and forth to realize the full restraint of the Ordovician limestone water-containing layer system.
Specifically, the Ordovician limestone aquifer system adjusts the depth of the aquifer by changing the thickness of the bottom, can be fixed in the device after modeling is finished by pouring in layers in advance according to an actual mine design test rock stratum model, can build a collapse column and a fault inside, and realizes simulation analysis on rock strata with different proportions, different structures and different distributions.
Specifically, the variable frequency disturbance simulation system 8 can adjust the vibration frequency and intensity, and can select vibrating rods with different lengths and radiuses to perform disturbance of different degrees on goafs with different mining distances, so as to realize far-field and near-field microseismic transmission.
Specifically, the noise-reduction night vision monitoring system 9 can shoot under a dark light condition without generating red exposure, record the goaf picture in real time and transmit the goaf picture to the cloud, and support remote checking of multiple devices.
Specifically, the hydraulic monitoring system 3 and the temperature control system 4 are provided with a plurality of sensing pieces, can be placed at different depths of a water-bearing stratum, can be attached to the surface of a rock stratum model closely, monitor and record the pressure or temperature at different positions in real time, automatically generate a data chart, and upload the data chart to a cloud for storage.
Specifically, the matrix distributed PTC ceramic heating system is installed in the lateral thermal module loading plate 12, the heating speed is high, uniform and continuous, the temperature can be controlled in a partitioned mode, and the temperature of multiple positions of the Ordovician limestone water-containing layer system can be adjusted, so that the influences of the temperature on the ground stress distribution and the engineering mechanical properties of rock masses are researched.
A multi-field coupling test method for simulating deep mining Ordovician limestone gushing water is applied to the multi-field coupling test device for simulating deep mining Ordovician limestone gushing water, and comprises the following steps:
1) designing an actually explored mine rock stratum structure into a rock stratum model according to a certain proportion, placing a temperature sensing piece and a hydraulic sensing piece at the position of the rock stratum model to be measured and in a water-bearing stratum, then placing the rock stratum model on the upper part of the water-bearing stratum of the device in a manner of clinging to an equipment plate 2, moving a fixing plate 1 through a transverse screw 13 to be tightly contacted with the rock stratum model, and screwing a nut 14;
2) placing a top loading plate 10 on the upper surface of the rock stratum model, starting a hydraulic servo loader 6 and a hydraulic jack 11, and setting vertical pressure F required by the test1And lateral pressure F2；
3) The temperature control system 4 is started, and the temperature T of five subareas of the rock stratum model required by the test is set1、T2、T3、T4、T5The lateral thermal module loading plate 12 heats the rock stratum model to enable the temperature of each region of the rock stratum model monitored by the temperature control system 4 to reach the set temperature;
4) starting the variable frequency disturbance simulation system 8, setting the vibration frequency and the intensity of the vibrating rod to enable the vibrating rod to meet the disturbance condition required by the test, then starting the noise reduction night vision monitoring system 9, and observing the picture inside the goaf of the rock stratum model in real time through the display screen;
5) the tension loader 5 is started, the piston 7 is moved through the traction rope to compress the aquifer liquid, the tension loader 5 records the displacement S of the piston 7, the aquifer liquid is enabled to be pressed to flow into a goaf through a pore or a fault or a collapse column in the rock stratum model, and the hydraulic monitoring system 3 and the temperature control system 4 respectively record the hydraulic pressure P and the temperature T of the position where the sensing piece is located. After observing the water inrush phenomenon in the goaf through a display screen, determining the water inrush occurrence time, and observing the water inrush process and degree;
6) and unloading the hydraulic servo loader 6 and the hydraulic jack 11, deriving various measurement data in the test process, turning off the power supply of the equipment, loosening the nut 14, unloading the fixing plate 1, taking out the rock stratum model, and observing the water inrush path of the rock stratum model.
The invention relates to a multi-field coupling test method for simulating deep mining Ordovician limestone gushing water, which comprises the steps of firstly testing a rock stratum model according to actual mine design, placing the rock stratum model on the upper part of a water-bearing stratum of a device by clinging to an equipment plate, moving a fixing plate to be in contact with the rear end face of the rock stratum model through a transverse screw rod, and constraining the boundary of the rock stratum model by screwing a nut(ii) a The hydraulic servo loader applies vertical force F to the loading surface of the rock stratum model through a top loading plate and steel balls1The hydraulic jack applies lateral force F to the left end face and the right end face of the rock stratum model through the lateral thermal module loading plate2The internal pressure bearing P of the rock stratum model is increased by drawing a piston through a tension loader arranged on an equipment plate, the rock stratum model is disturbed by a variable-frequency disturbance simulation system, and the rock stratum model is heated to reach the temperature T by a matrix distributed PTC ceramic heating system in a lateral thermal module loading plate; after observing the water inrush phenomenon inside the goaf through the display screen, determining the water inrush occurrence time, observing the water inrush process and degree, unloading the hydraulic servo loader and the hydraulic jack, deriving various measurement data of the test process, turning off the power supply of the equipment, loosening the nut, dismounting the fixing plate, taking out the rock stratum model, and observing the water inrush path of the rock stratum model. The test method can accurately realize the three-high-one disturbance characteristics of high stress, high pressure bearing, high ground temperature and severe disturbance when the Ordovician limestone water burst occurs in the rock stratum model, is convenient and simple to operate, has high data measurement efficiency, can meet the teaching task and test exploration of the Ordovician limestone water burst mechanism by combining engineering practice, provides effective test data for the prevention and control of the Ordovician limestone water burst and the safe mining of coal mines, and has great implementation value and social and economic benefits.
Specifically, after the step 3) of heating the rock stratum model by the lateral thermal module loading plate to enable the temperature of each region of the rock stratum model monitored by the temperature control system to reach the set temperature, the method further comprises the following steps: the temperature control system controls the heating power of the lateral thermal module loading plate in real time, when the temperature is higher than a set temperature by a certain value, the heating power is reduced, and when the temperature is lower than the set temperature by a certain value, the heating power is increased, so that the temperature of the rock stratum model is always kept in a certain interval of the set temperature.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications, enhancements and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (8)
1. A multi-field coupling test device for simulating deep mining Ordovician limestone gushing water is characterized by comprising an Ordovician limestone water-bearing layer system, a fixed plate, an equipment plate, a hydraulic monitoring system, a temperature control system, a tension loader, a hydraulic servo loader, a piston, a variable-frequency disturbance simulation system, a noise reduction night vision monitoring system, a top loading plate, a hydraulic jack, a lateral thermal module loading plate, a transverse screw and a nut; the hydraulic servo loader has multiple loading modes of displacement and force control; the upper end surface of the top loading plate is connected with the hydraulic servo loader, and the lower end surface of the top loading plate is contacted with steel balls distributed on the upper loading surface of the rock stratum model to transmit uniform load to the rock stratum model; the tension loader is positioned on two sides of the middle part of the equipment plate and is connected with the piston through a traction rope for loading, and the displacement of the piston is automatically recorded in real time by a data acquisition system in the tension loader; the hydraulic monitoring system can record the water pressure of the aquifer changed at each part under the stress action in real time; the temperature control system records the temperature change of the Ordovician limestone water-containing layer system in real time and regulates and controls the heating power of the lateral thermal module loading plate; the hydraulic jack is in contact with the lateral thermal module loading plate through the fixer, and when the hydraulic jack works, the lateral thermal module loading plate loads the left end face and the right end face of the Ordovician limestone aquifer system so as to simulate the loading action of lateral tectonic stress on the stratum; the variable-frequency disturbance simulation system is arranged in an equipment plate area corresponding to the middle of the goaf, and the top end and the side surface of the vibrating rod are in close contact with the surface of the rock stratum; the noise-reduction night vision monitoring system is arranged in an equipment board area at the upper part of the goaf, and the camera is fixed in the goaf; the fixing plate is connected with the equipment plate through a transverse screw and fixed by a nut, and the fixing plate can move back and forth to realize full restraint on the Ordovician limestone water-containing layer system.
2. The multi-field coupling test device for simulating deep mining Ordovician limestone gushing water as claimed in claim 1, wherein the Ordovician limestone aquifer system adjusts the aquifer depth by changing the bottom thickness, can be fixed in the device after being built in advance by layer pouring and modeling according to an actual mine design test rock stratum model, can internally build a sinking column and a fault, and realizes simulation analysis on rock strata with different proportions, different structures and different distributions.
3. The multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water as claimed in claim 1, wherein the frequency conversion disturbance simulation system can adjust vibration frequency and intensity, and can select vibrating rods with different lengths and radii to perform different degrees of disturbance on goafs with different mining distances, so as to realize far-field and near-field micro-seismic transmission.
4. The multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water as claimed in claim 1, wherein the noise reduction night vision monitoring system can shoot under dark light conditions without red exposure, record the goaf pictures in real time and transmit the goaf pictures to a cloud end, and support remote viewing of multiple devices.
5. The multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water as claimed in claim 1, wherein the hydraulic monitoring system and the temperature control system are provided with a plurality of sensing pieces, can be placed at different depths of an aquifer and can be closely attached to the surface of a rock stratum model, so that the pressure or the temperature at different positions can be monitored and recorded in real time, a data chart can be automatically generated, and the data chart can be uploaded to a cloud for storage.
6. The multi-field coupling test device for simulating deep mining of Ordovician limestone gushing water as claimed in claim 1, wherein a matrix distributed PTC ceramic heating system is installed in the lateral thermal module loading plate, the heating speed is high, uniform and continuous, temperature control can be performed in a partitioned mode, and the temperature of multiple positions of an Ordovician limestone water-containing layer system is adjusted, so that the influences of temperature on ground stress distribution and engineering mechanical properties of rock masses are researched.
7. A multi-field coupling test method for simulating deep mining Ordovician limestone gushing water is applied to the multi-field coupling test device for simulating deep mining Ordovician limestone gushing water, which is characterized by comprising the following steps of:
1) designing a mine rock stratum structure which is actually explored into a rock stratum model according to a certain proportion, placing a temperature sensing piece and a hydraulic sensing piece at the position of the rock stratum model which needs to be measured and in a water-bearing stratum, then placing the rock stratum model on the upper part of the water-bearing stratum of the device by clinging to an equipment plate, moving a fixing plate by a transverse screw rod to be tightly contacted with the rock stratum model, and screwing a nut;
2) placing a top loading plate on the upper surface of the rock stratum model, starting a hydraulic servo loader and a hydraulic jack, and setting vertical pressure F required by the test1And lateral pressure F2；
3) Starting the temperature control system, and setting the temperature T of five subareas of the rock stratum model required by the test1、T2、T3、T4、T5The lateral thermal module loading plate heats the rock stratum model to enable the temperature of each region of the rock stratum model monitored by the temperature control system to reach the set temperature;
4) starting a variable frequency disturbance simulation system, setting the vibration frequency and the strength of a vibrating rod to enable the vibrating rod to meet the disturbance condition required by the test, then starting a noise reduction night vision monitoring system, and observing the picture inside the goaf of the rock stratum model in real time through a display screen;
5) the method comprises the following steps of starting a tension loader, moving a piston through a traction rope to compress aquifer liquid, recording the displacement S of the piston by the tension loader, enabling the aquifer liquid to be pressed to flow into a goaf through a hole or a fault or a collapse column in a rock stratum model, respectively recording the hydraulic pressure P and the temperature T of a position where a sensing sheet is located by a hydraulic monitoring system and a temperature control system, observing the water inrush phenomenon in the goaf through a display screen, determining the water inrush occurrence time, and observing the water inrush process and degree;
6) unloading the hydraulic servo loader and the hydraulic jack, deriving various measurement data in the test process, turning off a power supply of the equipment, loosening the nut, detaching the fixed plate, taking out the rock stratum model, and observing the water inrush path of the rock stratum model.
8. The multi-field coupling test method for simulating deep mining of Ordovician limestone gushing water as claimed in claim 7, wherein: in step 3), after the step of heating the rock stratum model by the lateral thermal module loading plate to enable the temperature of each region of the rock stratum model monitored by the temperature control system to reach the set temperature, the method further comprises the following steps: the temperature control system controls the heating power of the lateral thermal module loading plate in real time, when the temperature is higher than a set temperature by a certain value, the heating power is reduced, and when the temperature is lower than the set temperature by a certain value, the heating power is increased, so that the temperature of the rock stratum model is always kept in a certain interval of the set temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113863982A (en) * | 2021-09-03 | 2021-12-31 | 中煤科工集团西安研究院有限公司 | Large-scale real three-dimensional old air disaster simulation experiment device that permeates water |
| CN116026698A (en) * | 2022-12-23 | 2023-04-28 | 平顶山天安煤业股份有限公司 | Test method for roof collapse of goaf of coal bed under disturbance stress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863982A (en) * | 2021-09-03 | 2021-12-31 | 中煤科工集团西安研究院有限公司 | Large-scale real three-dimensional old air disaster simulation experiment device that permeates water |
| CN113863982B (en) * | 2021-09-03 | 2024-05-03 | 中煤科工集团西安研究院有限公司 | Large-scale true three-dimensional hollow permeable disaster simulation experiment device |
| CN116026698A (en) * | 2022-12-23 | 2023-04-28 | 平顶山天安煤业股份有限公司 | Test method for roof collapse of goaf of coal bed under disturbance stress |
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