CN115171503A - Simulation experiment system for similar spontaneous combustion materials of residual coal in multilayer complex goaf - Google Patents
Simulation experiment system for similar spontaneous combustion materials of residual coal in multilayer complex goaf Download PDFInfo
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- CN115171503A CN115171503A CN202210653114.0A CN202210653114A CN115171503A CN 115171503 A CN115171503 A CN 115171503A CN 202210653114 A CN202210653114 A CN 202210653114A CN 115171503 A CN115171503 A CN 115171503A
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Abstract
The invention belongs to the technical field of coal mines, and discloses a simulation experiment system for spontaneous combustion similar materials of residual coal in a multi-layer complex goaf, which comprises the following steps: the experimental box body comprises a box body, a sealing cover plate is arranged at an opening above the box body, a porous baffle plate is arranged at the bottom of the box body along the vertical direction, a porous cover plate is arranged above the porous baffle plate along the horizontal direction, and the space in the box body is divided into an upper part and a lower part by the porous cover plate; a heating plate is arranged above the porous cover plate, and a layer of coal powder is laid above the heating plate; the space below the porous cover plate is divided into a goaf and a working area by the porous baffle plate, a stop block and a U-shaped hollow protective pipe are arranged in the working area, the hollow protective pipe is arranged on the periphery of the stop block, and two ends of the hollow protective pipe extend to the outer side of the box body; the space around the working area is fully paved with coal powder. The invention can simulate the spontaneous combustion process of the residual coal in the goaf under various specific conditions and provide guidance for mine fire prevention and control.
Description
Technical Field
The invention belongs to the technical field of coal mines, and particularly relates to a simulation experiment system for spontaneous combustion similar materials of residual coal in a multi-layer complex goaf.
Background
Coal spontaneous ignition is one of main disasters faced in coal mining, and according to statistics, over 50 percent of national key mines have coal seam spontaneous ignition tendency. The goaf is an area in the mine where spontaneous combustion of coal is more likely to occur, because the goaf belongs to a caving space, cracks in the goaf develop and residual coal is left, oxygen enters the goaf to oxidize the coal and release heat, but the heat cannot be timely taken away by convective heat transfer and surface heat conduction generated by air leakage, so that fire hazard is caused due to continuous rise of temperature. Meanwhile, the ignition point of the goaf is difficult to approach, the fire source is hidden, the combustion process is slow, the time is long, and the fire disaster is difficult to completely extinguish. Once a fire disaster occurs in the goaf, gas explosion, coal dust explosion and other derived accidents can be caused in the coal and gas outburst mine, and the shock wave generated by explosion is larger than the destructive power of the fire disaster, thereby causing great threat to the personnel safety and the mine mechanical equipment. Therefore, the research of developing a simulation experiment of the similar spontaneous combustion material of the residual coal in the multi-layer complex goaf is of great significance.
Under the background, a large number of experiments are needed to solve the problems that whether the spontaneous combustion method of the residual coal in the goaf is feasible, factors influencing the prevention and treatment effect and the like. The field experiment investment is too specific and the prevention and control effect is unknown, so the best method at present is to build a simulated goaf in a laboratory, and simultaneously properly adjust the proportion of simulation materials according to the coal seam thickness, the coal type, the coal remaining amount and the occurrence state of different mines to simulate the spontaneous combustion condition of the residual coal in the multi-layer complex goaf as far as possible, so that the spontaneous combustion process of the residual coal in the multi-layer complex goaf is reduced more truly, and guidance is provided for mine fire prevention and control.
Disclosure of Invention
The invention overcomes the defects of the prior art, and solves the technical problems that: the simulation experiment system for the similar material of spontaneous combustion of the residual coal in the multi-layer complex goaf is provided, so that the accurate simulation of the whole process of spontaneous combustion of the residual coal in the multi-layer goaf is realized.
In order to solve the technical problems, the invention adopts the technical scheme that: a simulation experiment system for spontaneous combustion similar materials of residual coal in a multi-layer complex goaf comprises: the experimental box body comprises a box body, a sealing cover plate is arranged at an opening above the box body, a porous baffle plate is arranged at the bottom of the box body along the vertical direction, a porous cover plate is arranged above the porous baffle plate along the horizontal direction, and the space in the box body is divided into an upper part and a lower part by the porous cover plate; a heating plate is arranged above the porous cover plate, and a layer of coal powder is laid above the heating plate;
the space below the porous cover plate is divided into a goaf and a working area by the porous baffle plate, a stop block and a U-shaped hollow protective pipe are arranged in the working area, the hollow protective pipe is arranged on the periphery of the stop block, and two ends of the hollow protective pipe extend to the outer side of the box body; and the space around the working area is fully paved with coal dust.
The box body is provided with a plurality of sealed threading holes, and the sealed threading holes are used for connecting sensors in the experimental box.
The sealed threading hole is arranged on the side plate on one side of the box body far away from the working area.
And the box body is provided with a clamping groove corresponding to the porous baffle, and the porous baffle is clamped in the clamping groove.
The box body is provided with a limiting strip at a position corresponding to the porous cover plate, and the porous cover plate is arranged on the limiting strip.
The simulation experiment system for the similar spontaneous combustion material of the residual coal in the multi-layer complex goaf also comprises a gas propulsion comprehensive control system and a data acquisition and processing system;
the gas propulsion integrated control system is used for inflating the experiment box body;
the data acquisition and processing system is used for acquiring sensing data in the experimental box body.
The simulation experiment system for the similar spontaneous combustion material of the residual coal in the multi-layer complex gob further comprises measuring rods arranged at different positions in the gob, and temperature sensors and gas concentration sensors are arranged at the end parts of the measuring rods and used for measuring the temperature and the gas concentration of each part in the experiment box body.
The simulation experiment system for the spontaneous combustion similar material of the residual coal in the multi-layer complex goaf comprises the following steps:
s1, determining the thickness of a coal seam and the type of coal according to test parameters, and building an experiment system;
s2, starting a heating device, and heating the coal bed in the experiment box body through a heating plate;
s3, exhausting air in the experiment box body, simulating the air flow of the roadway, and simultaneously controlling the flow of the air according to experiment conditions;
and S4, measuring the coal bed temperature under different gas flows to obtain the coal bed spontaneous combustion parameters.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a simulation experiment system for similar materials for spontaneous combustion of residual coal in a multi-layer complex goaf, which can simulate the spontaneous combustion process of the residual coal in the multi-layer complex goaf under the laboratory condition and provide scientific guidance for mine disaster prevention and control; meanwhile, the invention can properly adjust the proportion of the simulation material according to the thickness of coal seams, the types of coal, the amount of residual coal in the goaf and the occurrence state of different mines to simulate the spontaneous combustion condition of the residual coal in the multi-layer complex goaf as much as possible, so that the spontaneous combustion process of the residual coal in the multi-layer complex goaf is reduced more truly, and guidance is provided for mine fire prevention and control.
Drawings
FIG. 1 is a front three-dimensional schematic view of a simulation experiment system for spontaneous combustion similar materials of residual coal in a multi-layer complex goaf, provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an experimental box in an embodiment of the present invention;
FIG. 3 is a three-dimensional exploded view of the experimental box structure according to the embodiment of the present invention;
FIG. 4 is a top view of the experimental box in the embodiment of the present invention;
FIG. 5 is a side view of an experimental box according to an embodiment of the present invention;
in the figure: 1-an experiment box body; 2-gas propulsion integrated control system; 3-a data acquisition processing system; 4-a box body; 5-high pressure seal ring; 6-sealing the cover plate; 7-sealing the threading hole; 8-gas path interface; 10-a card slot; 11-a porous baffle; 12-a porous cover plate; 13-a stopper; 14-hollow protection tube, 15-spacing strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, an embodiment of the present invention provides a simulation experiment system for spontaneous combustion similar materials of residual coal in a multi-layer complex gob, including: the device comprises an experiment box body 1, a gas propulsion comprehensive control system 2 and a data acquisition processing system 3; the experimental box body 1 comprises a box body 4, a sealing cover plate 6 is arranged at an opening above the box body 4, a porous baffle plate 11 is arranged at the bottom of the box body along the vertical direction, a porous cover plate 12 is arranged above the porous baffle plate 11 along the horizontal direction, and the space in the box body 4 is divided into an upper part and a lower part by the porous cover plate 12; a heating plate is arranged above the porous cover plate 12, and a layer of coal powder is laid above the heating plate to simulate a multilayer goaf; the space below the porous cover plate 12 is divided into a goaf and a working area by the porous baffle plate 11, a stop block 13 and a U-shaped hollow protective pipe 14 are arranged in the working area, the hollow protective pipe 14 is arranged on the periphery of the stop block 13, and two ends of the hollow protective pipe extend to the outer side of the box body 4; the surrounding space of the working area is fully paved with coal dust, and the goaf on the other side of the porous baffle 11 is used for simulating a single-layer goaf.
In this embodiment, the porous baffle 11 is provided with a plurality of vent holes for realizing the simulation of air leakage between the goaf and the working area. The porous cover plate 12 is also provided with a plurality of vent holes for realizing the simulation of air leakage between the upper layer goaf and the lower layer goaf. The U-shaped hollow protective pipe 14 is used for simulating an air inlet lane and an air return lane which are arranged on two sides of a coal face, and a ventilation opening is also arranged on the hollow protective pipe 14 and used for simulating air leakage between the air inlet lane and the air return lane and a coal seam.
Specifically, in this embodiment, be provided with a plurality of sealed through wires holes 7 on the box body 4, sealed through wires hole is used for connecting the sensor in the experiment box 1. The sealed threading hole 7 is arranged on the side plate of the box body 4 far away from one side of the working area. Through sealed through wires hole, can be to setting up the sensor measuring staff in the experimental box, arranged temperature sensor and gas concentration sensor on the measuring staff for measure the internal temperature everywhere of experimental box and gas concentration.
Specifically, as shown in fig. 2, a position of the box body 4 corresponding to the multi-hole cover plate 12 is provided with a limiting strip 15, and the multi-hole cover plate 12 is provided on the limiting strip 15. The sealing cover plate 6, the porous cover plate 12 and the heating plate are not shown in fig. 2 for the sake of clarity. The sealing cover plate 6 and the porous cover plate 12 are movable modules as a top plate and a top plate of an upper layer material, and can be inserted into the experimental box body through the groove in the side surface of the box body, and the sealing ring is installed on the inner wall of the groove, so that the air tightness can be ensured to simulate a goaf. Wherein, the porous cover plate 12 is provided with 11 rows of meshes, and each row of 20 meshes is 220 in total, and is used for simulating the phenomena of air leakage and coal leakage of a multilayer goaf.
The box body 4 is provided with a clamping groove 10 at a position corresponding to the porous baffle 11, and the porous baffle 11 is clamped in the clamping groove 10. The porous baffle 11 is a movable module and can be inserted into the experiment box body through the clamping groove 10 to simulate a goaf and a coal face of the same coal seam; the stop block 13 is fixed on the lower layer material bottom plate to simulate a coal pillar; the hollow protection pipes 14 are arranged on an air inlet tunnel, an air return tunnel and a coal face so as to simulate a stable face air inlet and return system.
Specifically, in the present embodiment, the gas propulsion integrated control system 2 is used for inflating the experiment box; the data acquisition and processing system 3 is used for acquiring sensing data in the experiment box body 1. When gas is filled into the experiment box body, the gas propulsion comprehensive control system is connected with the multifunctional sealing threading holes which need to be inflated correspondingly through the gas path pipes, and the flow speed of the gas are comprehensively controlled. The multifunctional sealing threading hole connected with the sensor is connected with the data acquisition and processing system through a data line, and data are acquired and converted in real time.
Specifically, the back of the experiment box body 1 is provided with 9 rows of multifunctional sealed threading holes, and each row of the multifunctional sealed threading holes is 20 and 180 in number, and is used for embedding sensors into materials in the experiment box body or filling gas into the materials.
Specifically, the experimental method of the multilayer complex goaf residual coal spontaneous combustion similar material simulation experiment system of the embodiment includes the following steps:
s1, determining the thickness of a coal seam and the type of coal according to test parameters, and building an experiment system.
When an experimental system is built, coal powder is used as aggregate, clay is used as cementing material to prepare a coal bed similar material top and bottom plate, and a heating plate is used for simulating an ignition heat source of a goaf. When the lower layer material is laid, the lower layer material is separated by a porous baffle plate 11, a layer of coal dust is laid in a simulated goaf close to one side of a multifunctional threading hole, a steel hollow protection pipe and a stop block are placed on the other side of the porous baffle plate 11, the coal dust is filled in the steel hollow protection pipe and the stop block and compacted to simulate a roadway and a coal pillar, the steel hollow protection pipe ensures the stability of a ventilation line on one hand, and on the other hand, the air leakage of an air inlet roadway and a coal mining working face to the goaf in the ventilation process can be simulated; when the similar materials on the upper layer are laid: firstly, placing a porous cover plate 12 as a bottom plate made of similar materials, and then placing a heating plate to provide enough temperature for residual coal in the goaf to promote spontaneous combustion; and finally, a layer of coal powder is laid above the heating plate to simulate the coal left in the goaf. A plurality of measuring rods are uniformly inserted into all positions of the goaf, and the lower ends of the measuring rods are provided with temperature sensors and gas concentration sensors. The upper end of the measuring rod is connected with a sensor signal wire, and the signal wire is connected with an external computer through a wire outlet of the experimental box body. The temperature sensor is used for reflecting the temperature in the goaf in real time, the gas concentration sensor comprises a CO2 concentration sensor, an O2 concentration sensor, an N2 concentration sensor and a CH4 concentration sensor, and the temperature sensor is used for monitoring the specific gas concentration at different positions of the goaf.
S2, starting the heating device, and heating the coal bed in the experiment box body through the heating plate.
S3, exhausting air in the experiment box body, simulating the air flow of the roadway, and controlling the air flow according to experiment conditions.
And starting the gas propulsion comprehensive control system. And simulating the wind flow of the tunnel by exhausting air from the inner air outlet and simulating the wind flow by controlling the flow of the air.
And S4, measuring the coal bed temperature under different gas flows to obtain the coal bed spontaneous combustion parameters.
And when the configuration of the simulation system is finished, starting the heating device and the gas propulsion comprehensive control system, wherein the heating layer of the upper similar material bottom plate continuously provides heat for the residual coal in the gob, and simultaneously, the gas propulsion comprehensive control system works to enable the air inlet roadway and the coal face to continuously leak air to the multi-layer gob, so that oxygen is provided to simulate the spontaneous combustion condition of the residual coal. Whether spontaneous combustion occurs or not can be detected through a temperature sensor arranged in the goaf.
The invention provides a simulation experiment system for similar materials for spontaneous combustion of residual coal in a multi-layer complex goaf, which can simulate the spontaneous combustion process of the residual coal in the goaf under a certain specific condition on the one hand; on the other hand, by controlling the variable method, the pertinence test can be properly adjusted and developed according to the coal seam thickness, the coal type, the coal amount left in the goaf and the occurrence state of different mines, the pertinence of fire prevention and extinguishing measures can be enhanced, the effect of fire prevention and extinguishing engineering is improved, natural firing accidents are effectively prevented, and the method has very important practical significance for preventing the natural firing in the goaf and ensuring the safety production of fully mechanized caving surfaces.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a similar material simulation experiment system of multilayer complex goaf residual coal spontaneous combustion which characterized in that includes: the experimental box body (1) comprises a box body (4), a sealing cover plate (6) is arranged at an opening above the box body (4), a porous baffle plate (11) is arranged at the bottom of the box body along the vertical direction, a porous cover plate (12) is arranged above the porous baffle plate (11) along the horizontal direction, and the space in the box body (4) is divided into an upper part and a lower part by the porous cover plate (12); a heating plate is arranged above the porous cover plate (12), and a layer of coal powder is laid above the heating plate;
the space below the porous cover plate (12) is divided into a goaf and a working area by the porous baffle plate (11), a stop block (13) and a U-shaped hollow protective pipe (14) are arranged in the working area, the hollow protective pipe (14) is arranged on the periphery of the stop block (13), and two ends of the hollow protective pipe extend to the outer side of the box body (4); and the space around the working area is fully paved with coal dust.
2. The simulation experiment system for the spontaneous combustion similar material of the residual coal in the multi-layer complex goaf according to claim 1, wherein a plurality of sealing threading holes (7) are formed in the box body (4) and are used for being connected with a sensor in the experiment box body (1).
3. The simulation experiment system for the spontaneous combustion similar material of the residual coal in the multi-layer complex goaf as claimed in claim 2, wherein the sealing threading hole (7) is formed in a side plate of the box body (4) far away from one side of the working area.
4. The simulation experiment system for the multi-layer complex goaf residual coal spontaneous combustion similar material according to claim 1, wherein a clamping groove (10) is formed in a position, corresponding to the porous baffle (11), on the box body (4), and the porous baffle (11) is clamped in the clamping groove (10).
5. The multi-layer complex goaf residual coal spontaneous combustion similar material simulation experiment system as claimed in claim 1, wherein a position on the box body (4) corresponding to the porous cover plate (12) is provided with a limiting strip (15), and the porous cover plate (12) is arranged on the limiting strip (15).
6. The simulation experiment system for the spontaneous combustion similar material of the residual coal in the multi-layer complex goaf according to claim 1, characterized by further comprising a gas propulsion comprehensive control system (2) and a data acquisition processing system (3);
the gas propulsion integrated control system (2) is used for inflating the experiment box body;
the data acquisition and processing system (3) is used for acquiring sensing data in the experiment box body (1).
7. The spontaneous combustion similar material simulation experiment system for the residual coal in the multi-layer complex goaf as claimed in claim 1, further comprising measuring rods arranged at different positions in the goaf, wherein the end parts of the measuring rods are provided with temperature sensors and gas concentration sensors for measuring the temperature and the gas concentration at each position in the experiment box body (1).
8. The simulation experiment system for the spontaneous combustion similar material of the residual coal in the multi-layer complex goaf according to claim 1, wherein the experiment method comprises the following steps:
s1, determining the thickness of a coal seam and the type of coal according to test parameters, and building an experiment system;
s2, starting a heating device, and heating the coal bed in the experiment box body through a heating plate;
s3, exhausting air in the experiment box body, simulating the air flow of the roadway, and simultaneously controlling the flow of the air according to experiment conditions;
and S4, measuring the coal bed temperature under different gas flows to obtain the coal bed spontaneous combustion parameters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210653114.0A CN115171503A (en) | 2022-06-10 | 2022-06-10 | Simulation experiment system for similar spontaneous combustion materials of residual coal in multilayer complex goaf |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210653114.0A CN115171503A (en) | 2022-06-10 | 2022-06-10 | Simulation experiment system for similar spontaneous combustion materials of residual coal in multilayer complex goaf |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060248800A1 (en) * | 2002-09-05 | 2006-11-09 | Miglin Maria T | Apparatus and process for production of high purity hydrogen |
| CN106703867A (en) * | 2017-01-23 | 2017-05-24 | 中国矿业大学 | Coal mine goaf coal spontaneous combustion flow field simulation experiment table |
| CN109162761A (en) * | 2018-09-13 | 2019-01-08 | 辽宁工程技术大学 | A kind of coal seam group multilayer goaf pressure regulation Ventilation simulation analytical equipment and method |
| CN214887167U (en) * | 2021-05-31 | 2021-11-26 | 西安科技大学 | High-ground-temperature mine goaf hot and humid air flow exchange simulation experiment platform |
| CN114460260A (en) * | 2021-12-29 | 2022-05-10 | 淮北矿业股份有限公司 | Method for monitoring spontaneous combustion danger area of residual coal in gob of fully mechanized caving mining face |
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- 2022-06-10 CN CN202210653114.0A patent/CN115171503A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060248800A1 (en) * | 2002-09-05 | 2006-11-09 | Miglin Maria T | Apparatus and process for production of high purity hydrogen |
| CN106703867A (en) * | 2017-01-23 | 2017-05-24 | 中国矿业大学 | Coal mine goaf coal spontaneous combustion flow field simulation experiment table |
| CN109162761A (en) * | 2018-09-13 | 2019-01-08 | 辽宁工程技术大学 | A kind of coal seam group multilayer goaf pressure regulation Ventilation simulation analytical equipment and method |
| CN214887167U (en) * | 2021-05-31 | 2021-11-26 | 西安科技大学 | High-ground-temperature mine goaf hot and humid air flow exchange simulation experiment platform |
| CN114460260A (en) * | 2021-12-29 | 2022-05-10 | 淮北矿业股份有限公司 | Method for monitoring spontaneous combustion danger area of residual coal in gob of fully mechanized caving mining face |
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