CN112083142A - Experimental device and method for simulating goaf fire index gas generation - Google Patents
Experimental device and method for simulating goaf fire index gas generation Download PDFInfo
- Publication number
- CN112083142A CN112083142A CN202010994085.5A CN202010994085A CN112083142A CN 112083142 A CN112083142 A CN 112083142A CN 202010994085 A CN202010994085 A CN 202010994085A CN 112083142 A CN112083142 A CN 112083142A
- Authority
- CN
- China
- Prior art keywords
- goaf
- air
- simulation model
- concentration sensor
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 72
- 239000003245 coal Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 31
- 239000007924 injection Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000005977 Ethylene Substances 0.000 claims abstract description 15
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000000523 sample Substances 0.000 claims description 32
- 239000011521 glass Substances 0.000 claims description 22
- 238000002474 experimental method Methods 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005338 heat storage Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000001073 sample cooling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 230000002269 spontaneous effect Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/48—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation
- G01N25/4846—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on solution, sorption, or a chemical reaction not involving combustion or catalytic oxidation for a motionless, e.g. solid sample
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/28—Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Theoretical Computer Science (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Geometry (AREA)
- Computing Systems (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Evolutionary Computation (AREA)
- Algebra (AREA)
- Computer Hardware Design (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Physics (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to an experimental device and a method for simulating fire index gas generation in a goaf, wherein the device comprises a ventilator, a goaf simulation model, a thermocouple temperature control device, a data acquisition module, a computer terminal and a water injection cooling device, an air return pipeline and an air inlet pipeline are communicated with the goaf in a simulation mode, and a return air speed sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, an ethylene concentration sensor and an acetylene concentration sensor are arranged in the air return pipeline; the air inlet pipeline is provided with an air inlet air speed sensor and an air inlet oxygen concentration sensor; the goaf simulation model is internally provided with a thermocouple, a temperature sensor, a data acquisition module and a computer terminal. The experimental device simulates the generation process of fire index gas of the goaf, measures the change process of index gas generated by spontaneous combustion of residual coal of the goaf along with the oxidation temperature of the coal under the ventilation condition, and provides a basis for prediction and prediction of spontaneous combustion of the goaf and division simulation of spontaneous combustion three zones of the mine goaf.
Description
Technical Field
The invention belongs to the technical field of mine fire prevention and control, and particularly relates to an experimental device and method for simulating goaf fire index gas generation.
Background
Mine fire is one of the main natural disasters of coal mining production work, not only threatens the life safety of underground workers, but also causes serious property loss and environmental pollution. The method is characterized in that the prevention of internal fire caused by spontaneous combustion of the residual coal in the goaf is always the key point of coal mine safety production, the spontaneous combustion of the coal is a complex physicochemical reaction process, the residual coal in the goaf can reach a combustion state after a certain time by absorbing external heat and self-releasing heat to accumulate heat, and in the process of heat absorption, temperature rise and oxidation, index gases such as carbon monoxide (CO), ethylene (C2H 4), acetylene (C2H 2) and the like are released along with the rise of the temperature of the coal.
At present, the main mode of the experimental device for acquiring the goaf fire index gas is a temperature programming experiment, the temperature of the coal when the index gas is released is measured by matching infrared spectroscopy, but external ventilation conditions are omitted in the experiment, so that the generation of the goaf fire index gas is more consistent with the actual situation of spontaneous combustion of residual coal in the goaf, an experimental device for simulating the generation of the goaf fire index gas is urgently needed to obtain the goaf fire index gas, a basis is provided for prediction of the goaf spontaneous combustion and division simulation of three zones of the mine goaf spontaneous combustion, and the experimental device has important significance for mine formulation of underground disaster prevention measures.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an experimental device and a method for simulating the generation of fire index gas of a goaf.
An experimental device for simulating fire index gas generation in a goaf comprises a ventilator, a goaf simulation model, a thermocouple temperature control device, a data acquisition module, a computer terminal and a water injection cooling device, wherein an air cylinder of the ventilator is connected with one end of a return air pipeline through a rubber pipe transfer port, the other end of the return air pipeline is communicated with the goaf simulation model, and a return air speed sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, an ethylene concentration sensor and an acetylene concentration sensor are arranged in the return air pipeline; the air inlet pipeline is communicated with the goaf simulation model and arranged on the same side with the air return pipeline, and an air inlet air speed sensor and an air inlet oxygen concentration sensor are arranged on the air inlet pipeline; the goaf simulation model is internally provided with a thermocouple and a temperature sensor with adjustable positions, and the thermocouple temperature control device is connected with the thermocouple through a heat-resistant lead; the water injection cooling device is provided with an anti-blocking water injection nozzle which is arranged on the back wall of the goaf simulation model; the air return air speed sensor, the carbon monoxide concentration sensor, the oxygen concentration sensor, the ethylene concentration sensor, the acetylene concentration sensor, the temperature sensor, the air inlet speed sensor and the air inlet oxygen concentration sensor are electrically connected with the data acquisition module through wires, and the data acquisition module is electrically connected with the computer terminal.
The ventilator is a direct current extraction type ventilator, and the power of the ventilator can be adjusted according to the actual conditions of different experimental roadways.
The air inlet pipeline and the air return pipeline are square glass pipelines.
The goaf simulation model is a glass cuboid, and the upper glass of the goaf simulation model is detachable.
And an aluminum silicate cotton heat-insulating layer is adhered to the inner wall of the goaf simulation model, so that a good heat storage condition is provided for the coal sample.
The front part of the goaf simulation model is provided with two round holes which are respectively connected with an air inlet pipeline and an air return pipeline; the junction is provided with the dust screen, prevents that the dust in the collecting space area simulation model from getting into air inlet duct, return air duct, polluting the inside sensor probe of pipeline.
Rectangular holes are formed in the left side and the right side of the goaf simulation model respectively, and glass sheets are covered on the inner walls of the openings of the rectangular holes and used for adjusting the size of the openings of the rectangular holes so as to simulate the air leakage rate of the goaf simulation model; and the outer wall of each rectangular hole is prevented from being provided with a blocking net, so that the coal sample in the goaf simulation model is prevented from leaking.
Water injection cooling device includes small-size water pump and water injection pipeline, prevents stifled water injection shower nozzle and water injection pipe connection for coal sample cooling after the experiment ends prevents that the experimental apparatus is overheated to guarantee experimenter safety.
In the device, the joints of each air speed sensor, each carbon monoxide concentration sensor, each oxygen concentration sensor, each ethylene concentration sensor and each acetylene concentration sensor with an air inlet pipeline and an air return pipeline are sealed by silica gel, and the joints of the two temperature sensors, each thermocouple and each goaf simulation model are sealed by silica gel to ensure the air tightness of each goaf simulation model.
The use method of the experimental device for simulating the fire index gas generation of the goaf comprises the following steps:
step 1: starting a ventilator, checking whether air leaks from each connection part of the experimental device, if so, sealing the air leakage part by using silica gel, and closing the ventilator until the experimental device is good in air tightness and does not leak air any more;
step 2: digging upper glass of a goaf simulation model, laying an experimental coal sample from bottom to top and from front to back, and adjusting the lumpiness and the particle size of the coal sample according to the purpose of the experiment;
calculating air leakage rate according to the experimental purpose, adjusting glass sheets at rectangular openings on the left side and the right side of the goaf simulation model, and adjusting air leakage area to meet the experimental requirement;
and step 3: adjusting the positions of a temperature sensor and a thermocouple in the goaf simulation model in the coal sample to ensure that the temperature sensor and the thermocouple are positioned at the center of the coal sample, and tightly covering the upper glass of the goaf simulation model after the coal sample is laid;
and 4, step 4: starting the ventilator again, and debugging the wind speed of the ventilator to enable the wind speed to reach the mine wind speed of the simulated mine;
and 5: starting a thermocouple temperature control device, and heating the thermocouple according to the experimental purpose;
step 6: after the experiment, the ventilator is closed, the water injection cooling device is started, water is injected into the goaf simulation model through the anti-blocking water injection nozzle, the experiment coal sample is cooled, and the safety of experimenters is guaranteed.
The invention has the beneficial effects that: according to the invention, the spontaneous combustion condition of the residual coal in the goaf of the mine is simulated by arranging the ventilator, the air inlet pipeline and the air return pipeline, so that the gas parameter acquisition of the temperature rise and oxidation of the residual coal in the goaf is realized, wherein the gas parameter acquisition comprises carbon monoxide concentration, oxygen concentration, ethylene concentration and acetylene concentration; the experimental device can compare the gas concentration parameter changes of different fire source points of different goafs; the air leakage rate can be adjusted through the glass sheets on the side wall of the goaf simulation model, and the interaction influence relationship between the air leakage rate and the spontaneous combustion temperature of the residual coal in the goaf is researched. The experimental device provided by the invention has the advantages of simple structure, low cost and capability of repeated experiments.
Drawings
FIG. 1 is a schematic view of an apparatus provided in the present invention;
wherein the content of the first and second substances,
the utility model provides a ventilation blower, 2 rubber tube switching mouth, 3 air inlet ducts, 4 return air pipelines, 5 air inlet air velocity transducer, 6 air inlet oxygen concentration sensor, 7 return air velocity transducer, 8 acetylene concentration sensor, 9 ethylene concentration sensor, 10 return air oxygen concentration sensor, 11 carbon monoxide concentration sensor, 12 collecting space area simulation model, 13 temperature sensor, 14 thermocouples, 15 thermocouple temperature control device, 16 data acquisition module, 17 computer terminal, 18 prevent stifled water injection shower nozzles, 19 water injection cooling device, 20 dust screens, 21 barrier nets.
Detailed Description
For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, an experimental device for simulating goaf fire index gas generation comprises a ventilator 1, a goaf simulation model 12, a thermocouple 14, a thermocouple temperature control device 15, a data acquisition module 16, a computer terminal 17 and a water injection cooling device 19, wherein a wind barrel of the ventilator 1 is connected with one end of a return air pipeline 4 through a rubber pipe adapter 2, the other end of the return air pipeline 4 is communicated with goaf simulation, and a return air speed sensor 7, a carbon monoxide concentration sensor 11, an oxygen concentration sensor, an ethylene concentration sensor 9 and an acetylene concentration sensor 8 are arranged in the return air pipeline 4; the air inlet pipeline 3 is communicated with the goaf simulation model 12 and arranged on the same side with the air return pipeline 4, and an air inlet air speed sensor 5 and an air inlet oxygen concentration sensor 6 are arranged on the air inlet pipeline 3; a thermocouple 14 and a temperature sensor 13 with adjustable positions are arranged in the goaf simulation model 12, the thermocouple provides a heat source for heating the coal sample, and the temperature sensor 13 is used for sensing the internal temperature of the coal sample; the thermocouple temperature control device 15 is connected with the thermocouple 14 through a heat-resistant lead, and the temperature of the thermocouple 14 is changed to control the temperature rise of the coal sample; the water injection cooling device 19 is provided with an anti-blocking water injection nozzle 18, and the anti-blocking water injection nozzle 18 is arranged on the rear wall of the goaf simulation model 12; the return air wind speed sensor 7, the carbon monoxide concentration sensor 11, the oxygen concentration sensor, the ethylene concentration sensor 9, the acetylene concentration sensor 8, the temperature sensor 13, the inlet air wind speed sensor 5 and the inlet air oxygen concentration sensor 6 are electrically connected with the data acquisition module 16 through wires, the data acquisition module 16 is electrically connected with the computer terminal 17, multi-channel data acquisition can be realized, and data are transmitted to the computer terminal 17.
The ventilator 1 is a direct-current extraction type ventilator 1 and is used for providing ventilation power for the whole experiment pipeline and ensuring sufficient oxygen supply; the power of the wind power generation device can be adjusted according to the actual conditions of different experimental roadways so as to achieve the wind speed and the wind volume required by the experiment.
The air inlet pipeline 3 and the air return pipeline 4 are square glass pipelines, and the air inlet pipeline 3 and the air return pipeline 4 simulate an air inlet roadway and an air return roadway of a mine to form an air inlet and return system.
The goaf simulation model 12 is a glass cuboid, and the upper glass of the goaf simulation model is detachable, so that coal samples can be placed conveniently.
An aluminum silicate wool heat-insulating layer is attached to the inner wall of the goaf simulation model 12, and good heat storage conditions are provided for the coal sample.
The front part of the goaf simulation model 12 is provided with two round holes which are respectively connected with an air inlet pipeline 3 and an air return pipeline 4; the dust screen 20 is arranged at the joint to prevent the dust in the goaf simulation model 12 from entering the air inlet pipeline 3 and the air return pipeline 4 to pollute the sensor probe in the pipeline.
Rectangular holes are respectively formed in the left side and the right side of the goaf simulation model 12, and glass sheets are covered on the inner walls of the openings of the rectangular holes and used for adjusting the size of the openings of the rectangular holes so as to simulate the air leakage rate of the goaf simulation model 12.
And the rectangular holes of the rectangular holes are provided with the blocking nets 21, so that the coal sample in the goaf simulation model 12 is prevented from leaking.
Water injection cooling device 19 includes small-size water pump and water injection pipeline, prevents stifled water injection shower nozzle 18 and water injection pipe connection for coal sample cooling after the experiment, prevent that the experimental apparatus is overheated to guarantee experimenter safety.
In the device, joints of each air speed sensor, each carbon monoxide concentration sensor 11, each oxygen concentration sensor, each ethylene concentration sensor 9, each acetylene concentration sensor 8, an air inlet pipeline 3 and an air return pipeline 4 are sealed by silica gel, and joints of two temperature sensors 13 and thermocouples 14 and a goaf simulation model 12 are sealed by silica gel to ensure the air tightness of the goaf simulation model 12.
The method for carrying out the experiment by adopting the experimental device for simulating the fire index gas generation of the goaf specifically comprises the following steps:
step 1: starting the ventilator 1, checking whether air leaks from the joints of the experimental device, if so, sealing the air leaks by using silica gel, and closing the ventilator 1 until the experimental device is good in air tightness and does not leak air any more;
step 2: the upper glass of the goaf simulation model 12 is dug, experimental coal samples are laid from bottom to top and from front to back, and the lumpiness and the particle size of the coal samples are adjusted according to the purpose of the experiment;
in the coal sample laying process, the selected coal sample block size is to ensure that the air flow flows normally and the air flow flows normally near the connecting port of the goaf simulation model 12 with the air inlet pipeline 3 and the air return pipeline 4; calculating air leakage rate according to the experimental purpose, adjusting glass sheets at rectangular openings on the left side and the right side of the goaf simulation model 12, and adjusting air leakage area to meet the experimental requirement;
and step 3: adjusting the positions of the temperature sensor 13 and the thermocouple 14 in the coal sample in the goaf simulation model 12 to ensure that the temperature sensor 13 and the thermocouple 14 are positioned at the center of the coal sample, and tightly covering the upper glass of the goaf simulation model 12 after the coal sample is laid;
and 4, step 4: starting the ventilator 1 again, and debugging the wind speed of the ventilator to enable the wind speed to reach the mine wind speed of the simulated mine;
and 5: starting a thermocouple temperature control device 15, and heating a thermocouple 14 according to the experiment purpose;
during the experiment, the air flow flows in from the pipe orifice of the air inlet pipe 3, passes through the air inlet air speed sensor 5 and the air inlet oxygen concentration sensor 6, and enters the goaf simulation model 12 through the air inlet pipe 3; the temperature sensor 13 in the goaf simulation model 12 detects the temperature of the coal sample, because the coal sample contacts with oxygen in the wind current to generate oxidation reaction under the heating action of the thermocouple 14, carbon monoxide, ethylene and acetylene index gases are generated in the reaction process, and the gases flow along with the wind current and flow back to the return air pipeline 4 from the goaf simulation model 12, flow through the carbon monoxide concentration sensor 11, the return air oxygen concentration sensor 10, the ethylene concentration sensor 9, the acetylene concentration sensor 8 and the return air wind speed sensor 7 in the return air pipeline 4, and are discharged by the ventilator 1 through the rubber adapter;
in the experimental process, the monitoring data of all the sensors are transmitted to a data acquisition module 16, the data acquisition module 16 transmits the data transmitted by all the sensors to a computer terminal 17, and data acquisition software and MATLAB software developed based on Labview software are used for recording, storing and analyzing;
step 6: after the experiment, the ventilator 1 is closed, the water injection cooling device 19 is started, water is injected into the goaf simulation model 12 through the anti-blocking water injection nozzle 18, the experiment coal sample is cooled, and the safety of experimenters is guaranteed.
Claims (10)
1. The utility model provides an experimental apparatus of gaseous production of simulation collecting space area fire index which characterized in that: the device comprises a ventilator, a goaf simulation model, a thermocouple temperature control device, a data acquisition module, a computer terminal and a water injection cooling device, wherein an air cylinder of the ventilator is connected with one end of a return air pipeline through a rubber pipe switching port, the other end of the return air pipeline is communicated with the goaf simulation model, and a return air speed sensor, a carbon monoxide concentration sensor, an oxygen concentration sensor, an ethylene concentration sensor and an acetylene concentration sensor are arranged in the return air pipeline; the air inlet pipeline is communicated with the goaf simulation model and arranged on the same side with the air return pipeline, and an air inlet air speed sensor and an air inlet oxygen concentration sensor are arranged on the air inlet pipeline; the goaf simulation model is internally provided with a thermocouple and a temperature sensor with adjustable positions, and the thermocouple temperature control device is connected with the thermocouple through a heat-resistant lead; the water injection cooling device is provided with an anti-blocking water injection nozzle which is arranged on the back wall of the goaf simulation model; the air return air speed sensor, the carbon monoxide concentration sensor, the oxygen concentration sensor, the ethylene concentration sensor, the acetylene concentration sensor, the temperature sensor, the air inlet speed sensor and the air inlet oxygen concentration sensor are electrically connected with the data acquisition module through wires, and the data acquisition module is electrically connected with the computer terminal.
2. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: the ventilator is a direct current extraction type ventilator, and the power of the ventilator can be adjusted according to the actual conditions of different experimental roadways.
3. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: the air inlet pipeline and the air return pipeline are square glass pipelines.
4. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: the goaf simulation model is a glass cuboid, and the upper glass of the goaf simulation model is detachable.
5. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: and an aluminum silicate cotton heat-insulating layer is adhered to the inner wall of the goaf simulation model, so that a good heat storage condition is provided for the coal sample.
6. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: the front part of the goaf simulation model is provided with two round holes which are respectively connected with an air inlet pipeline and an air return pipeline; the junction is provided with the dust screen, prevents that the dust in the collecting space area simulation model from getting into air inlet duct, return air duct, polluting the inside sensor probe of pipeline.
7. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: rectangular holes are formed in the left side and the right side of the goaf simulation model respectively, and glass sheets are covered on the inner walls of the openings of the rectangular holes and used for adjusting the size of the openings of the rectangular holes so as to simulate the air leakage rate of the goaf simulation model; and the outer wall of each rectangular hole is prevented from being provided with a blocking net, so that the coal sample in the goaf simulation model is prevented from leaking.
8. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: water injection cooling device includes small-size water pump and water injection pipeline, prevents stifled water injection shower nozzle and water injection pipe connection for coal sample cooling after the experiment ends prevents that the experimental apparatus is overheated to guarantee experimenter safety.
9. The experimental device for simulating goaf fire indicator gas generation according to claim 1, wherein: in the device, the joints of each air speed sensor, each carbon monoxide concentration sensor, each oxygen concentration sensor, each ethylene concentration sensor and each acetylene concentration sensor with an air inlet pipeline and an air return pipeline are sealed by silica gel, and the joints of the two temperature sensors, each thermocouple and each goaf simulation model are sealed by silica gel to ensure the air tightness of each goaf simulation model.
10. The use method of the experimental device for simulating goaf fire indicator gas generation, disclosed by claim 1, is characterized by comprising the following steps:
step 1: starting a ventilator, checking whether air leaks from each connection part of the experimental device, if so, sealing the air leakage part by using silica gel, and closing the ventilator until the experimental device is good in air tightness and does not leak air any more;
step 2: digging upper glass of a goaf simulation model, laying an experimental coal sample from bottom to top and from front to back, and adjusting the lumpiness and the particle size of the coal sample according to the purpose of the experiment;
calculating air leakage rate according to the experimental purpose, adjusting glass sheets at rectangular openings on the left side and the right side of the goaf simulation model, and adjusting air leakage area to meet the experimental requirement;
and step 3: adjusting the positions of a temperature sensor and a thermocouple in the goaf simulation model in the coal sample to ensure that the temperature sensor and the thermocouple are positioned at the center of the coal sample, and tightly covering the upper glass of the goaf simulation model after the coal sample is laid;
and 4, step 4: starting the ventilator again, and debugging the wind speed of the ventilator to enable the wind speed to reach the mine wind speed of the simulated mine;
and 5: starting a thermocouple temperature control device, and heating the thermocouple according to the experimental purpose;
step 6: after the experiment, the ventilator is closed, the water injection cooling device is started, water is injected into the goaf simulation model through the anti-blocking water injection nozzle, the experiment coal sample is cooled, and the safety of experimenters is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994085.5A CN112083142A (en) | 2020-09-21 | 2020-09-21 | Experimental device and method for simulating goaf fire index gas generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994085.5A CN112083142A (en) | 2020-09-21 | 2020-09-21 | Experimental device and method for simulating goaf fire index gas generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112083142A true CN112083142A (en) | 2020-12-15 |
Family
ID=73740107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010994085.5A Pending CN112083142A (en) | 2020-09-21 | 2020-09-21 | Experimental device and method for simulating goaf fire index gas generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112083142A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030372A (en) * | 2021-03-24 | 2021-06-25 | 西安科技大学 | Drought area environment simulation coal natural ignition test device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501310A (en) * | 2016-10-25 | 2017-03-15 | 中国矿业大学(北京) | Based on the oxidization of remained coal intensification simulation experiment method that goaf air parameter is surveyed |
| CN108333291A (en) * | 2018-02-01 | 2018-07-27 | 山东科技大学 | A kind of experimental provision and test method of simulation spontaneous combustion in goaf |
| CN109060867A (en) * | 2018-08-15 | 2018-12-21 | 辽宁工程技术大学 | Study deep-well causes calamity source to act on lower spontaneous combustion of remaining coal characteristic multifunction emulation experimental bench more |
| CN109209468A (en) * | 2018-11-19 | 2019-01-15 | 天地（常州）自动化股份有限公司 | The special thickness mined out area working face of inflammable seam multilayer coal, which is removed, erects body method of fire protection |
| CN110763423A (en) * | 2019-10-18 | 2020-02-07 | 中国矿业大学 | Spontaneous goaf temperature distribution rapid simulation experiment device and method |
| RU2723106C1 (en) * | 2019-12-02 | 2020-06-08 | Дмитрий Борисович Никишичев | Method for monitoring of mined-out space |
-
2020
- 2020-09-21 CN CN202010994085.5A patent/CN112083142A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501310A (en) * | 2016-10-25 | 2017-03-15 | 中国矿业大学(北京) | Based on the oxidization of remained coal intensification simulation experiment method that goaf air parameter is surveyed |
| CN108333291A (en) * | 2018-02-01 | 2018-07-27 | 山东科技大学 | A kind of experimental provision and test method of simulation spontaneous combustion in goaf |
| CN109060867A (en) * | 2018-08-15 | 2018-12-21 | 辽宁工程技术大学 | Study deep-well causes calamity source to act on lower spontaneous combustion of remaining coal characteristic multifunction emulation experimental bench more |
| CN109209468A (en) * | 2018-11-19 | 2019-01-15 | 天地（常州）自动化股份有限公司 | The special thickness mined out area working face of inflammable seam multilayer coal, which is removed, erects body method of fire protection |
| CN110763423A (en) * | 2019-10-18 | 2020-02-07 | 中国矿业大学 | Spontaneous goaf temperature distribution rapid simulation experiment device and method |
| RU2723106C1 (en) * | 2019-12-02 | 2020-06-08 | Дмитрий Борисович Никишичев | Method for monitoring of mined-out space |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030372A (en) * | 2021-03-24 | 2021-06-25 | 西安科技大学 | Drought area environment simulation coal natural ignition test device and method |
| CN113030372B (en) * | 2021-03-24 | 2024-04-12 | 西安科技大学 | Device and method for testing natural ignition of simulated coal in arid region environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103712756B (en) | A kind of quantitative leakage detection method of pressure system | |
| CN111261011B (en) | Mine fire simulation experiment platform and experiment method | |
| CN102935275B (en) | A kind of test method and device evaluating total flooding extinguishing property | |
| CN101914904A (en) | Fire simulation experiment equipment for caverns in hydraulic and hydro-power engineering and simulation experiment method | |
| CN113049191B (en) | Mining SF6 tracer gas detection system that leaks out | |
| CN113376209A (en) | Horizontal combustion test device and method for wires and cables | |
| CN104990687A (en) | A visual experiment device and method for studying dust migration rules of fully-mechanized excavating face roadways | |
| CN110779674A (en) | Experimental device and experimental method for determining ventilation thermal resistance of roadway in mine fire period | |
| CN112802389A (en) | Multifunctional tunnel fire test platform with communication flue | |
| CN111983133B (en) | Pipe gallery pipeline fire simulation experiment platform and experiment method thereof | |
| CN112083142A (en) | Experimental device and method for simulating goaf fire index gas generation | |
| CN104251894A (en) | Testing device for simulating operation of filling CO2 into mine gob area for preventing and extinguishing fire | |
| CN205679555U (en) | A kind of coal mine gob distribution law of temperature field analog simulation experimental rig | |
| CN106567998B (en) | Gas pipeline leak detection simulation experiment platform based on fibre optic temperature sensor | |
| CN107120185A (en) | Gas engine peculiar to vessel | |
| CN110763423B (en) | Spontaneous goaf temperature distribution rapid simulation experiment device and method | |
| CN213239984U (en) | Multi-field coupled goaf three-dimensional spontaneous combustion zone analog simulation experiment device | |
| CN103728105B (en) | A kind of quantitative leak detecting device of pressure system | |
| CN109856184A (en) | Constraint space flammable gas explosion flow-field test device and method under water storage condition | |
| CN209154977U (en) | A kind of fire fighting gas fire extinguishing system wireless pressure monitoring device | |
| CN207080283U (en) | Gas engine peculiar to vessel | |
| CN203629754U (en) | A quantitative leakage detection apparatus for a pressure system | |
| CN115445135A (en) | Concatenation formula utility tunnel conflagration experimental apparatus | |
| CN203455178U (en) | Vertical member fireproof detection control system | |
| CN111308009B (en) | Mining high polymer material smoldering oxygen consumption and product synchronous test analysis device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |