CN220231732U - Simulation device for coal and gas outburst under high ground stress condition - Google Patents
Simulation device for coal and gas outburst under high ground stress condition Download PDFInfo
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- CN220231732U CN220231732U CN202321628673.2U CN202321628673U CN220231732U CN 220231732 U CN220231732 U CN 220231732U CN 202321628673 U CN202321628673 U CN 202321628673U CN 220231732 U CN220231732 U CN 220231732U
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- 239000003245 coal Substances 0.000 title claims abstract description 82
- 238000004088 simulation Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 27
- 239000011521 glass Substances 0.000 claims description 21
- 239000011435 rock Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 239000002817 coal dust Substances 0.000 abstract description 5
- 238000003795 desorption Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 86
- 239000007787 solid Substances 0.000 description 7
- 238000005336 cracking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a simulation device for coal and gas outburst under high ground stress conditions, which comprises a box body, wherein the top of the box body is connected with a hydraulic loading system, the bottom surface in the box body is connected with a gas injection adsorption system, the side wall of the box body is connected with an acoustic emission monitoring system, one side wall of the box body is connected with a baffle through threads, the baffle is arranged close to the bottom of the box body, the side wall of the box body is also connected with a vacuum tube, and the acoustic emission monitoring system is connected with an upper computer through a pipeline. According to the utility model, raw coal samples and coal-like rocks are mainly mines, coal and gas outburst accidents are simulated when a mine excavator excavates a closed coal bed with high gas pressure, accurate simulation can be performed when the high-pressure high-gas-content coal bed is excavated, and theoretical relations among an energy conversion process when the coal and the gas are outburst, a gas instantaneous desorption process in the coal, a coal dust throwing amount and gas pressure are quantitatively determined.
Description
Technical Field
The utility model relates to the technical field of equipment for simulating mine coal and gas outburst, in particular to a device for simulating coal and gas outburst under high ground stress conditions.
Background
Coal and gas outburst is an extremely complex mine gas dynamic phenomenon. When the outburst happens, a large amount of pulverized coal and gas instantaneously flow into a roadway or a stope, pulverized coal-gas-solid two-phase flow is formed in the roadway or the stope, the special gas-solid two-phase flow has storm-like property, the roadway with the length of thousands of meters can be filled up against the wind flow, underground facilities are destroyed, the underground personnel casualties are caused, and gas explosion and coal dust explosion can be caused when serious, so that larger-scale damage is caused.
In recent years, along with the increase of coal mining depth in China, the outburst risk of coal beds is continuously increased, and a plurality of non-outburst coal beds at the shallow part of a mine are gradually converted into the outburst coal beds after the mining activities enter the deep level, so that the outburst accidents become the most important factors seriously threatening the mine safety production. In order to effectively prevent and treat coal and gas outburst disasters, a large number of methods are used for researching an outburst mechanism, but most of the researches are qualitative descriptions at present, and lack of deep theoretical analysis and laboratory experiments prove that on-site industrial experiments cannot be implemented due to the extreme dangers of coal and gas outburst.
Disclosure of Invention
The utility model aims to provide a simulation device for coal and gas outburst under high ground stress conditions, which can be used for carrying out accurate simulation experiments when high-pressure high-gas-content coal beds are excavated.
The utility model adopts the technical scheme that the simulation device for coal and gas outburst under the high ground stress condition comprises a box body, wherein the top of the box body is connected with a hydraulic loading system, the bottom surface in the box body is connected with a gas injection adsorption system, the side wall of the box body is connected with an acoustic emission monitoring system, one side wall of the box body is connected with a baffle through threads, the baffle is arranged close to the bottom of the box body, the side wall of the box body is also connected with a vacuum tube, and the acoustic emission monitoring system is connected with an upper computer through a pipeline.
The utility model is also characterized in that:
the device also comprises a protruding monitoring system, wherein the protruding monitoring system is matched with the connecting holes of the baffle and the box body, and is connected with the upper computer through a pipeline.
The hydraulic loading system comprises a pressing plate, the pressing plate is matched with the box in size, the pressing plate is arranged in the box, the plate surface of the pressing plate is connected with a hydraulic loading column, and the hydraulic loading column penetrates through the top of the box.
The gas injection adsorption system comprises a gas injection pipe, the gas injection pipe penetrates through the side wall of the box body, the end part of the gas injection pipe extending into the box body is connected with a screen pipe, the screen pipe is connected with the inner bottom surface of the box body, and a plurality of gas outlet holes are uniformly formed in the pipe wall of the screen pipe along the length direction of the screen pipe.
The acoustic emission monitoring system comprises a plurality of acoustic emission sensors which are arranged on two opposite side walls of the box body, and the acoustic emission sensors are connected with the upper computer through pipelines.
The protruding monitoring system comprises a glass column, one end of the glass column is connected with a stud, the stud is matched with a connecting hole of the baffle and the box body, the inner wall of the glass column is connected with a plurality of gas sensors along the length direction of the inner wall of the glass column, the inner wall of the glass column is also connected with a moving camera, the moving camera is far away from the stud, the gas sensors and the moving camera are connected with an upper computer through pipelines, and the end part of the glass column far away from the stud is matched with a drill bit.
The inner wall of the box body is also connected with a pressure sensor, and the pressure sensor is connected with an upper computer through a pipeline.
The beneficial effects of the utility model are as follows:
the simulation device for the coal and gas outburst under the high ground stress condition takes raw coal samples and coal-like rocks as main mines, simulates coal and gas outburst accidents when a mine excavator excavates a closed coal bed with high gas pressure, can accurately simulate the coal bed with high gas pressure during excavation, and quantitatively determines the theoretical relationship among the energy conversion process, the instantaneous desorption process of the gas in the coal, the pulverized coal throwing amount and the gas pressure during the coal and gas outburst.
Drawings
FIG. 1 is a schematic left side view of a simulation apparatus for coal and gas outburst under high ground stress conditions according to the utility model;
FIG. 2 is a right side schematic view of a simulation apparatus for coal and gas outburst under high ground stress conditions according to the utility model;
FIG. 3 is a schematic rear side view of a simulation apparatus for coal and gas outburst under high ground stress conditions according to the utility model;
FIG. 4 is a schematic diagram of the structure of the gas injection system in the simulation device for coal and gas outburst under high ground stress conditions according to the utility model;
FIG. 5 is a schematic diagram of the system for monitoring the protrusion of coal and gas in the simulation device under high ground stress condition according to the present utility model;
FIG. 6 is a schematic diagram of the structure of a drill bit in a simulation device for coal and gas outburst under high ground stress conditions.
In the figure: 1. the hydraulic loading device comprises a box body, a hydraulic loading column, a pressing plate, a baffle, a pressure sensor, an acoustic emission sensor, an air injection pipe, a screen pipe, an air outlet hole, a vacuum pipe, a glass column, a gas sensor, a motion camera, a drill bit and a stud.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model provides a simulation device for coal and gas outburst under high ground stress conditions, which is shown in fig. 1-2, and comprises a box body 1, wherein the top of the box body 1 is connected with a hydraulic loading system, the inner bottom surface of the box body 1 is connected with a gas injection adsorption system, the side wall of the box body 1 is connected with an acoustic emission monitoring system, one side wall of the box body 1 is connected with a baffle plate 4 through threads, the baffle plate 4 is arranged close to the bottom of the box body 1, the side wall of the box body 1 is also connected with a vacuum tube 8, and the acoustic emission monitoring system is connected with an upper computer through a pipeline. The box body 1 is internally filled with a filler, the filler is raw coal sample solid, coal-like rock solid and pulverized coal sample, the raw coal sample is loaded as mine fresh coal sample solid frozen by liquid nitrogen, the coal-like rock is rock-like coal rock when the rock cross cut coal is uncovered during mining of mine coal, in order to be closer to the actual condition of a mine, some coal matrix binders can be added, the geological condition of the coal mine is reduced to a greater extent, the inside of the box body 1 is ensured to be a closed space by a hydraulic loading system, the filler is extruded, the outside of the gas injection adsorption system is connected with a high-pressure gas pump, the gas sample for adsorption and degassing is subjected to gas-like gas, the vacuum tube 8 is connected with an external vacuum pump, the gas sample is degassed and the box body 1 is vacuumized, a high-pressure environment is maintained, desorption gas and adsorption gas in the raw coal sample in the box body 1 are sucked cleanly, the balance of gas adsorption quantity in the coal sample is stabilized, and the energy waves generated by micro-cracking in the coal rock are monitored by an acoustic emission monitoring system when instantaneous coal and gas are protruded.
Example 1
The utility model provides a coal and outstanding analogue means of gas under high ground stress condition, includes box 1, and box 1 top is connected with hydraulic loading system, and box 1 inner bottom surface is connected with gas injection adsorption system, and box 1's lateral wall is connected with acoustic emission monitoring system, and box 1's a lateral wall has baffle 4 through threaded connection, and baffle 4 is close to box 1's bottom setting, and box 1's lateral wall still is connected with vacuum tube 8, and acoustic emission monitoring system has the host computer through the pipeline connection.
The inner wall of the box body 1 is also connected with a pressure sensor 5, and the pressure sensor 5 is connected with an upper computer through a pipeline. For monitoring the pressure in the case 1 and transmitting the data to the host computer.
The device also comprises a protrusion monitoring system, wherein the protrusion monitoring system is matched with the connecting holes of the baffle 4 and the box body 1, and is connected with an upper computer through a pipeline. The protrusion monitoring system monitors the gas concentration and the coal cake and coal dust throwing distance when the transient protrusion occurs.
The hydraulic loading system comprises a pressing plate 3, the pressing plate 3 is matched with the box body 1 in size, the pressing plate 3 is arranged in the box body 1, the plate surface 3 of the pressing plate is connected with a hydraulic loading column 2, and the hydraulic loading column 2 penetrates through the top of the box body 1. The pressing plate 3 is a steel pouring pressing plate, the shape and the area of the pressing plate 3 are the same as those of the box body 1, a closed environment can be formed in the box body 1, the pressing plate is used for applying pressure to a coal sample to be tested and a coal-like rock, the mine ground stress process is simulated, and the occurrence condition of the raw coal sample is reduced better.
Example 2
The utility model provides a coal and outstanding analogue means of gas under high ground stress condition, includes box 1, and box 1 top is connected with hydraulic loading system, and box 1 inner bottom surface is connected with gas injection adsorption system, and box 1's lateral wall is connected with acoustic emission monitoring system, and box 1's a lateral wall has baffle 4 through threaded connection, and baffle 4 is close to box 1's bottom setting, and box 1's lateral wall still is connected with vacuum tube 8, and acoustic emission monitoring system has the host computer through the pipeline connection.
The device also comprises a protrusion monitoring system, wherein the protrusion monitoring system is matched with the connecting holes of the baffle 4 and the box body 1, and is connected with an upper computer through a pipeline.
The hydraulic loading system comprises a pressing plate 3, the pressing plate 3 is matched with the box body 1 in size, the pressing plate 3 is arranged in the box body 1, the plate surface 3 of the pressing plate is connected with a hydraulic loading column 2, and the hydraulic loading column 2 penetrates through the top of the box body 1.
As shown in fig. 3-4, the gas injection adsorption system comprises a gas injection pipe 7, the gas injection pipe 7 penetrates through the side wall of the box body 1, a screen pipe 71 is connected to the end part of the gas injection pipe 7 extending into the box body 1, the screen pipe 71 is connected with the inner bottom surface of the box body 1, and a plurality of gas outlet holes 72 are uniformly formed in the pipe wall of the screen pipe 71 along the length direction of the screen pipe. One end of the gas injection pipe 7, which is positioned outside the box body 1, is connected with a high-pressure gas pump and is used for injecting gas-like gas into the box body 1.
The acoustic emission monitoring system comprises a plurality of acoustic emission sensors 6, the acoustic emission sensors 6 are arranged on two opposite side walls of the box body 1, and the acoustic emission sensors 6 are connected with an upper computer through pipelines. The acoustic emission sensor 6 is used for monitoring energy waves generated by micro-cracking in coal and rock when instantaneous coal and gas outburst occurs in the process of excavating the drill bit 12, and then converting the energy waves into digital signals and transmitting the digital signals to the upper computer.
Example 3
The utility model provides a coal and outstanding analogue means of gas under high ground stress condition, includes box 1, and box 1 top is connected with hydraulic loading system, and box 1 inner bottom surface is connected with gas injection adsorption system, and box 1's lateral wall is connected with acoustic emission monitoring system, and box 1's a lateral wall has baffle 4 through threaded connection, and baffle 4 is close to box 1's bottom setting, and box 1's lateral wall still is connected with vacuum tube 8, and acoustic emission monitoring system has the host computer through the pipeline connection.
The device also comprises a protrusion monitoring system, wherein the protrusion monitoring system is matched with the connecting holes of the baffle 4 and the box body 1, and is connected with an upper computer through a pipeline.
The hydraulic loading system comprises a pressing plate 3, the pressing plate 3 is matched with the box body 1 in size, the pressing plate 3 is arranged in the box body 1, the plate surface 3 of the pressing plate is connected with a hydraulic loading column 2, and the hydraulic loading column 2 penetrates through the top of the box body 1.
As shown in fig. 3-4, the gas injection adsorption system comprises a gas injection pipe 7, the gas injection pipe 7 penetrates through the side wall of the box body 1, a screen pipe 71 is connected to the end part of the gas injection pipe 7 extending into the box body 1, the screen pipe 71 is connected with the inner bottom surface of the box body 1, and a plurality of gas outlet holes 72 are uniformly formed in the pipe wall of the screen pipe 71 along the length direction of the screen pipe.
The acoustic emission monitoring system comprises a plurality of acoustic emission sensors 6, the acoustic emission sensors 6 are arranged on two opposite side walls of the box body 1, and the acoustic emission sensors 6 are connected with an upper computer through pipelines.
As shown in fig. 5-6, the protrusion monitoring system comprises a glass column 9, one end of the glass column 9 is connected with a stud 13, the stud 13 is matched with a connecting hole of the baffle 4 and the box 1, the inner wall of the glass column 9 is connected with a plurality of gas sensors 10 along the length direction of the inner wall, the inner wall of the glass column 9 is also connected with a moving camera 11, the moving camera 11 is far away from the stud 13, the gas sensors 10 and the moving camera 11 are connected with an upper computer through pipelines, and a drill bit 12 is arranged at the end part of the glass column 9 far away from the stud 13 in a matched manner. The stud 13 is of a hollow structure, when the drill bit 12 is used for excavating disturbance, the baffle 4 is detached from the side wall of the box body 1, coal and gas cannot protrude at the moment, the glass column 9 is fixed on the box body 1 through the stud 13, the drill bit 12 is connected through the ultra-long drill rod to penetrate through the glass column 9 for excavating, and when the coal and the gas protrude, the gas concentration, the coal briquette and the coal dust throwing distance are monitored through the gas sensor 10 and the motion camera 11 and monitoring data are transmitted to the upper computer.
The working flow of the simulation device for coal and gas outburst under the high ground stress condition is as follows:
the top cover of the box body 1 is opened, raw coal sample solids are filled at one side, close to the rear wall, of the box body 1, coal-like rock solids are filled at the front part, the space part is filled with coal-like coal samples, the hydraulic loading column 2 and the pressing plate 3 apply pressure to the coal samples and the coal-like rock to be tested, the mine ground stress process is simulated, one end, located outside the box body 1, of the gas injection pipe 7 is connected with the high-pressure gas pump, gas-like gas is injected into the box body 1 through the sieve tube 71 and the gas outlet 72, when the drill bit 12 performs excavation disturbance, the baffle 4 is detached from the side wall of the box body 1, coal and gas cannot protrude at the moment, the glass column 9 is fixed on the box body 1 through the stud 13, the drill bit 12 is connected through the glass column 9 by adopting the ultra-long drill rod, when coal and gas protrude, the acoustic emission sensor 6 monitors energy waves generated by micro-cracking in the coal rock, then the energy waves are converted into digital signals, the digital signals are transmitted to the upper computer, and the gas concentration, the coal block and the coal dust ejection distance are transmitted to the upper computer 11 through the gas sensor 10, and the upper computer are monitored.
According to the simulation device for coal and gas outburst under the high-ground stress condition, disclosed by the utility model, the original coal sample and the coal-like rock are mainly the most original coal mines, the coal and gas outburst accidents are simulated when the mine excavator excavates the closed coal bed with high gas pressure, and the accurate simulation can be performed when the coal bed with high gas pressure and high gas content is excavated.
Claims (7)
1. The utility model provides a coal and outstanding analogue means of gas under high ground stress condition, its characterized in that, including box (1), box (1) top is connected with hydraulic loading system, the bottom surface is connected with gas injection adsorption system in box (1), the lateral wall of box (1) is connected with acoustic emission monitoring system, a lateral wall of box (1) has baffle (4) through threaded connection, baffle (4) are close to the bottom setting of box (1), the lateral wall of box (1) still is connected with vacuum tube (8), acoustic emission monitoring system has the host computer through the line connection.
2. The simulation device for coal and gas outburst under high ground stress conditions according to claim 1, further comprising an outburst monitoring system, wherein the outburst monitoring system is matched with connecting holes of the baffle plate (4) and the box body (1), and the outburst monitoring system is connected with an upper computer through a pipeline.
3. The simulation device for coal and gas protrusion under high ground stress conditions according to claim 1, wherein the hydraulic loading system comprises a pressing plate (3), the pressing plate (3) is matched with the box body (1) in size, the pressing plate (3) is arranged in the box body (1), a hydraulic loading column (2) is connected to the plate surface of the pressing plate (3), and the hydraulic loading column (2) penetrates through the top of the box body (1).
4. A simulation device for coal and gas protrusion under high ground stress condition according to claim 3, wherein the gas injection adsorption system comprises a gas injection pipe (7), the gas injection pipe (7) penetrates through the side wall of the box body (1), a screen pipe (71) is connected to the end part of the gas injection pipe (7) extending into the box body (1), the screen pipe (71) is connected with the inner bottom surface of the box body (1), and a plurality of gas outlet holes (72) are uniformly formed in the pipe wall of the screen pipe (71) along the length direction of the pipe wall.
5. The simulation device for coal and gas outburst under the high ground stress condition according to claim 1, wherein the acoustic emission monitoring system comprises a plurality of acoustic emission sensors (6), the acoustic emission sensors (6) are arranged on two opposite side walls of the box body (1), and the acoustic emission sensors (6) are connected with an upper computer through pipelines.
6. The simulation device for coal and gas protrusion under high ground stress conditions according to claim 2, wherein the protrusion monitoring system comprises a glass column (9), one end of the glass column (9) is connected with a stud (13), the stud (13) is matched with a connecting hole of a baffle plate (4) and a box body (1), a plurality of gas sensors (10) are connected to the inner wall of the glass column (9) along the length direction of the inner wall, a motion camera (11) is further connected to the inner wall of the glass column (9), the motion camera (11) is far away from the stud (13), the gas sensors (10) and the motion camera (11) are connected with an upper computer through pipelines, and a drill bit (12) is arranged at the end part, far away from the stud (13), of the glass column (9).
7. The simulation device for coal and gas outburst under high ground stress conditions according to claim 1, wherein the inner wall of the box body (1) is further connected with a pressure sensor (5), and the pressure sensor (5) is connected with an upper computer through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321628673.2U CN220231732U (en) | 2023-06-26 | 2023-06-26 | Simulation device for coal and gas outburst under high ground stress condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321628673.2U CN220231732U (en) | 2023-06-26 | 2023-06-26 | Simulation device for coal and gas outburst under high ground stress condition |
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| Publication Number | Publication Date |
|---|---|
| CN220231732U true CN220231732U (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321628673.2U Active CN220231732U (en) | 2023-06-26 | 2023-06-26 | Simulation device for coal and gas outburst under high ground stress condition |
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| Country | Link |
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| CN (1) | CN220231732U (en) |
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2023
- 2023-06-26 CN CN202321628673.2U patent/CN220231732U/en active Active
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