CN101487835B - Test apparatus for coal and gas burst - Google Patents
Test apparatus for coal and gas burst Download PDFInfo
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- CN101487835B CN101487835B CN 200910103157 CN200910103157A CN101487835B CN 101487835 B CN101487835 B CN 101487835B CN 200910103157 CN200910103157 CN 200910103157 CN 200910103157 A CN200910103157 A CN 200910103157A CN 101487835 B CN101487835 B CN 101487835B
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Abstract
The invention discloses an experimental device for the coal and gas burst, comprising a coal sample chamber and an atmospheric pressure loading device, wherein the coal sample chamber is provided with coal and gas exhaust nozzles having control valves, the atmospheric pressure loading device is provided with an atmospheric pressure loading channel that communicates with the inside of the coal sample chamber having a diaphragm in front of the control valves, and a cavity between the diaphragm and the control valves is a balancing cavity connected with a balanced atmospheric pressure loading device; the device also comprises a pressure acquisition device in the coal sample chamber and a camera arranged outside the coal sample chamber and the part of the coal sample chamber opposite to the camera is transparent. The invention is capable of simulating the pressure of gas and physical force of coal, achieving the instant fast pressure release to be closer to the actual coal and gas burst and the damage process of coal, and observing and recording the simulation to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the grain diameter of powdered coal, pressure while the formation and charging pressure can be regulated to observe the grain diameter parameters of different powdered coals and the experimental result under different pressures, and the device is flexible in use.
Description
Technical field
The present invention relates to a kind of coal section grinding device, particularly a kind of coal and gas burst experiment device.
Background technology
Coal and gas burst accident refer in process of coal mining, coal body is under terrestrial stress and gas acting in conjunction, broken coal and gas is by the abnormal dynamic phenomenon of dishing out to the digging space suddenly in coal body or rock mass, show as several tons of coal petrographys that even reach the fragmentation more than ten thousand tons to thousands of tons of within second time several seconds to tens, dished out to the digging space by coal and rock, with a large amount of Gas, endanger comparatively serious simultaneously.
Coal and Gas Outburst are dynamic disasters the most serious under coal mine, and its generation and terrestrial stress, gas pressure and coal petrography physico-mechanical properties are closely related, and wherein the effect of gas pressure is particularly important.In coal, the occurrence form of gas has free state and ADSORPTION STATE, wherein adsorption gas accounts for 90% left and right of whole gas bearing capacities, the gas of free state and the gas of ADSORPTION STATE role in coal and Gas Outburst is not clear at present, and the destructive process of coal body also fails to see intuitively always.Coal and Gas Outburst belong to geologic hazard, for a long time, due to the destructive process that can't observe directly coal and Gas Outburst, also with regard to unpredictable and prevention, therefore, because the accident that coal and Gas Outburst cause is also more frequent.
Simulation coal and gas burst experiment can provide theoretical foundation for research, prediction and prevention coal and Gas Outburst, how can simulate pressure and the coal body physical force of gas, the fast pressure relief of simulation methane gas as far as possible near the actual conditions of coal and Gas Outburst, is a difficult problem that needs to be resolved hurrily.
Therefore, need a kind of experimental provision, can simulate pressure and the coal body physical force of gas, can moment fast pressure relief, state when clearly observing and recording simulation coal and Gas Outburst is directly observed the destructive process of coal, for the prediction and prevention of coal and Gas Outburst provides theoretical foundation.
Summary of the invention
In view of this, the invention provides a kind of coal and gas burst experiment device, can simulate pressure and the coal body physical force of gas, can realize the moment fast pressure relief, the destructive process of the coal of more approaching reality and Gas Outburst and coal, and can clearly observe and record, for the prediction and prevention of coal and Gas Outburst provides theoretical foundation.
Coal of the present invention and gas burst experiment device, comprise coal sampling mill, air pressure-loading equipment, described coal sampling mill arranges the blowout of coal and gas mouth, the blowout of coal and gas mouth arranges operation valve, the pressurized gas passage of air pressure-loading equipment communicates with coal sampling mill inside, before the inherent operation valve of described coal sampling mill, barrier film is set, the cavity between described barrier film and operation valve is counter balance pocket, and described counter balance pocket is connected with the equilibrium air pressure loading equipemtn;
Also comprise the video camera that is arranged on the pressure acquisition device in coal sampling mill and is arranged on the coal sampling mill outside, the location transparency setting that coal sampling mill is relative with video camera.
Further, also comprise the coal sample shaped device, described coal sample shaped device comprises and can vertically stretch into coal sampling mill, and pressure cylinder, rack-and-pinion or the leading screw of reciprocating piston and driven plunger along coal sampling mill;
Further, described coal sampling mill is the cylindrical of an end opening, and the opening of described cylindrical coal sampling mill is the blowout of coal and gas mouth, and described piston can stretch into coal sampling mill from the blowout of coal and gas mouth;
Further, also comprise controller, described pressure acquisition device is pressure transducer, and described video camera is connected with controller respectively with pressure transducer;
Further, also comprise pedestal and the support of two pillar constructions, described coal sampling mill and coal sample shaped device are arranged on support, and at least two support mounting holes longitudinally are set on described each pedestal, and described support is carried on a shoulder pole on two pedestals by the support mounting hole;
Further, described coal sampling mill adopts transparent material to make;
Further, described air pressure-loading equipment is the gas gas cylinder, and the equilibrium air pressure loading equipemtn is pressure cylinder;
Further, described operation valve is solenoid valve, and the command input end of described solenoid valve connects controller.
beneficial effect of the present invention: coal of the present invention and gas burst experiment device, coal sampling mill adopts diaphragm seals blowout of coal and gas mouth, can simulate pressure and the coal body physical force of gas, can realize the moment fast pressure relief, the destructive process of the coal of more approaching reality and Gas Outburst and coal, and can clearly observe and record, for the prediction and prevention of coal and Gas Outburst provides theoretical foundation, can simulate coal body physical force and gas pressure makes coal and gas spray from the blowout of coal and gas mouth, investigating gas pressure and coal body physical force breeds at coal and Gas Outburst, start with evolution in role, pressure and charge pressure in the time of can adjusting particle diameter, the moulding of coal dust during use are observed the test findings under different coal particle size parameters and different pressures, use flexibly, the present invention is simple in structure, volume is little, cost of manufacture is low, realizes serialization and visual monitoring coal and Gas Outburst with lower cost and simple structure, operates fairly simple.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Accompanying drawing is structural representation of the present invention.
Embodiment
Accompanying drawing is structural representation of the present invention, as shown in the figure: the coal of the present embodiment and gas burst experiment device, comprise coal sampling mill 1, air pressure-loading equipment 13, coal sampling mill 1 arranges the blowout of coal and gas mouth, the blowout of coal and gas mouth arranges operation valve 6, and the pressurized gas passage of air pressure-loading equipment 13 communicates with coal sampling mill 1 inside, before the inherent operation valve 6 of coal sampling mill 1, barrier film 7 is set, cavity between barrier film 7 and operation valve 6 is counter balance pocket 9, and described counter balance pocket 9 is connected with equilibrium air pressure loading equipemtn 12; Operation valve 4 in the present embodiment is solenoid valve, controls simple and sensitive, improves the confidence level of test, certainly, can be also the automatic valves such as pneumatic valve; In the present embodiment, air pressure-loading equipment 13 is the gas gas cylinder, and equilibrium air pressure loading equipemtn 12 is pressure cylinder, and is simple in structure, easily obtains;
Also comprise controller 5, be arranged on the pressure acquisition device 2 in coal sampling mill 1 and be arranged on the video camera 4 of coal sampling mill 1 outside, the whole transparent material that adopts of coal sampling mill 1 is made, and can facilitate video camera 4 to obtain image from all directions; Certainly, the location transparency setting that coal sampling mill 1 also can be relative with video camera 4 also can realize the purpose of Image Acquisition; Pressure acquisition device 2 is pressure transducer, and video camera 4 is connected with controller 5 respectively with pressure transducer; The command input end of solenoid valve connects controller 5; Can automatically gather and control video camera and valve by controller, realize intellectualized operation;
In the present embodiment, also comprise the coal sample shaped device, described coal sample shaped device comprises and can vertically stretch into coal sampling mill 1, and reciprocating piston 8 along coal sampling mill, in the present embodiment, piston 8 drives by lifting jack, can certainly adopt other pressure mode to drive, perhaps adopt rack-and-pinion, leading screw to drive, can reach goal of the invention;
In the present embodiment, coal sampling mill 1 is the cylindrical of an end opening, the opening of cylindrical coal sampling mill 1 is the blowout of coal and gas mouth, piston 8 can stretch into coal sampling mill 1 from the blowout of coal and gas mouth, adopt cylindrical structural, can make the piston operation smooth and easy, coal sampling mill processing is easy for installation, volume is little, and locular wall is unstressed to be concentrated;
In the present embodiment, the pedestal 10 and the support 3 that also comprise two pillar constructions, described coal sampling mill 1 and coal sample shaped device are arranged on support 3, and at least two support mounting holes 11 longitudinally are set on described each pedestal 10, and described support 3 is carried on a shoulder pole on two pedestals 10 by support mounting hole 11; Pedestal 10 arranges support mounting hole 11 at vertical differing heights, and support is arranged on two pedestals 10 according to different inclination angles, can simulate different inclination angle, coal seam;
The present invention adopts the release equipment of membrane configuration, and pressure is released suddenly fast, makes test findings closer to the truth of coal and Gas Outburst;
The present invention puts coal dust in coal sampling mill in use, and driven plunger stretches into coal sampling mill, and coal dust is pressed into moulded coal, and piston is shifted out in coal sampling mill, and barrier film and closed control valve are installed; Inflate in coal sampling mill by the gas gas cylinder, inflate to counter balance pocket by the equilibrium air pressure loading equipemtn simultaneously, the pressure differential between maintenance coal sampling mill and counter balance pocket prevents the unexpected explosion of barrier film less than the breakdown strength of barrier film; Keep air pressure a period of time, gas is fully adsorbed, open pneumatic valve, make barrier film both sides draught head greater than the breakdown strength of film, rupture of membranes, release, gather image and pressure data by video camera and pressure transducer, controller records destructive process and the gas pressure change of coal; After test is completed, analyze destructive process and the reason thereof of coal, investigate gas pressure and the outstanding control action of coal body physical mechanics property confrontation in coal and Gas Outburst.
The present invention is simple in structure, easy to operate, test findings is simple and clear, realizes the flip-flop of coal sample stress in conjunction with the method for rupture of membranes release by the film valve, and controllability is strong.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. a coal and gas burst experiment device, comprise coal sampling mill, air pressure-loading equipment, described coal sampling mill arranges the blowout of coal and gas mouth, the blowout of coal and gas mouth arranges operation valve, the pressurized gas passage of air pressure-loading equipment communicates with coal sampling mill inside, it is characterized in that: before the inherent operation valve of described coal sampling mill, barrier film is set, the cavity between described barrier film and operation valve is counter balance pocket, and described counter balance pocket is connected with the equilibrium air pressure loading equipemtn;
Also comprise the video camera that is arranged on the pressure acquisition device in coal sampling mill and is arranged on the coal sampling mill outside, the location transparency setting that coal sampling mill is relative with video camera.
2. coal according to claim 1 and gas burst experiment device, it is characterized in that: also comprise the coal sample shaped device, described coal sample shaped device comprises and can vertically stretch into coal sampling mill, and pressure cylinder, rack-and-pinion or the leading screw of reciprocating piston and driven plunger along coal sampling mill.
3. coal according to claim 2 and gas burst experiment device, it is characterized in that: described coal sampling mill is the cylindrical of an end opening, the opening of described cylindrical coal sampling mill is the blowout of coal and gas mouth, and described piston can stretch into coal sampling mill from the blowout of coal and gas mouth.
4. coal according to claim 3 and gas burst experiment device, it is characterized in that: also comprise controller, described pressure acquisition device is pressure transducer, and described video camera is connected with controller respectively with pressure transducer.
5. coal according to claim 4 and gas burst experiment device, it is characterized in that: the pedestal and the support that also comprise two pillar constructions, described coal sampling mill and coal sample shaped device are arranged on support, at least two support mounting holes longitudinally are set on described each pedestal, and described support is carried on a shoulder pole on two pedestals by the support mounting hole.
6. coal according to claim 5 and gas burst experiment device is characterized in that: described coal sampling mill adopts transparent material to make.
7. coal according to claim 6 and gas burst experiment device, it is characterized in that: described air pressure-loading equipment is the gas gas cylinder, the equilibrium air pressure loading equipemtn is pressure cylinder.
8. coal according to claim 7 and gas burst experiment device, it is characterized in that: described operation valve is solenoid valve, the command input end of described solenoid valve connects controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910103157 CN101487835B (en) | 2009-02-06 | 2009-02-06 | Test apparatus for coal and gas burst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910103157 CN101487835B (en) | 2009-02-06 | 2009-02-06 | Test apparatus for coal and gas burst |
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| Publication Number | Publication Date |
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| CN101487835A CN101487835A (en) | 2009-07-22 |
| CN101487835B true CN101487835B (en) | 2013-06-05 |
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| CN 200910103157 Expired - Fee Related CN101487835B (en) | 2009-02-06 | 2009-02-06 | Test apparatus for coal and gas burst |
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| CN102095835B (en) * | 2011-01-19 | 2014-05-28 | 河南理工大学 | Device for simulating coal and gas outburst experiment |
| CN102252957B (en) * | 2011-04-19 | 2013-07-03 | 河南理工大学 | Experimental measurement device and method of solid-liquid conversion parameters of decompressed coal |
| CN102243223B (en) * | 2011-04-22 | 2014-04-30 | 河南理工大学 | Coal rock gas dynamic disaster simulation device |
| CN102353608B (en) * | 2011-07-08 | 2013-02-13 | 中国矿业大学 | Device and method for measuring prediction index critical value of coal and gas outburst |
| CN102507865B (en) * | 2011-10-21 | 2014-03-26 | 山东科技大学 | Simulation test system of coal-gas outburst during rock cross-cut coal uncovering |
| CN103412110B (en) * | 2013-08-26 | 2015-01-07 | 重庆大学 | Triaxial multiple coal and gas outburst test method |
| CN103412092B (en) * | 2013-08-26 | 2015-01-14 | 重庆大学 | Triaxial multiple coal and gas outburst test device |
| CN103412094B (en) * | 2013-08-26 | 2014-12-31 | 重庆大学 | Triaxial one-time coal and gas outburst test device |
| CN103412096B (en) * | 2013-08-26 | 2015-02-25 | 重庆大学 | Multi-parameter method for monitoring coal and gas outburst under condition of multi-field coupling |
| CN103529179B (en) * | 2013-10-30 | 2015-07-15 | 中煤科工集团重庆研究院有限公司 | Method for coal and gas outburst simulation experiment |
| CN105136837B (en) * | 2015-07-24 | 2017-08-29 | 中国矿业大学 | Liquid nitrogen circulating freeze-thawing permeability-increasing simulation test system and method for coal rock sample |
| CN105784490A (en) * | 2016-03-01 | 2016-07-20 | 山东科技大学 | Visual monitoring experiment device for coal body damage under gas pressure relief condition |
| CN105891429B (en) * | 2016-06-27 | 2017-09-22 | 河南理工大学 | The coal and gas prominent analogue means and test method of repeatable experiment |
| CN106018732B (en) * | 2016-06-27 | 2017-12-15 | 河南理工大学 | Gas dynamical disaster simulator stand quick release device and test method |
| CN107153062B (en) * | 2017-05-12 | 2019-10-25 | 太原理工大学 | A kind of detection device and detection method of coal and gas prominent |
| CN108387703A (en) * | 2018-01-25 | 2018-08-10 | 西安科技大学 | A kind of coal and gas prominent integrated experiment device |
| CN108956931B (en) * | 2018-06-07 | 2023-08-01 | 安徽理工大学 | Coal and gas outburst centrifugal model test device and method |
| CN108871905B (en) * | 2018-08-20 | 2020-08-04 | 山东科技大学 | Test method for influence of bedding surface roughness on deformation and permeability of mining coal seam |
| CN109374425B (en) * | 2018-12-17 | 2024-04-05 | 郑州轻工业学院 | Simulation research experiment device and experiment method for occurrence of fracture after gas-containing coal body pressure relief |
| CN109916555A (en) * | 2019-03-12 | 2019-06-21 | 中国矿业大学 | A kind of calibrating installation of electromagnetic wave gas pressure detector |
| CN113049772B (en) * | 2021-03-22 | 2023-07-21 | 南通市飞宇石油科技开发有限公司 | Continuous triaxial coal and gas outburst simulation experiment device |
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| CN101487835A (en) | 2009-07-22 |
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