CN101487834B - Combined test apparatus for coal and gas burst - Google Patents
Combined test apparatus for coal and gas burst Download PDFInfo
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- CN101487834B CN101487834B CN2009101031542A CN200910103154A CN101487834B CN 101487834 B CN101487834 B CN 101487834B CN 2009101031542 A CN2009101031542 A CN 2009101031542A CN 200910103154 A CN200910103154 A CN 200910103154A CN 101487834 B CN101487834 B CN 101487834B
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Abstract
The invention discloses a comprehensive experimental device for the coal and gas burst, comprising a coal sample chamber, a terrestrial stress simulation loading system and an atmospheric pressure loading device, wherein the terrestrial stress simulation loading system is provided with a force applying capsule and a loading device in a sealed container, the atmospheric pressure loading device is provided with an atmospheric pressure loading channel that communicates with the wall interlayer of the capsule, the loading device comprises at least two loading blocks, the coal sample chamber is enclosed by the loading blocks between which a gap is arranged, and the force applying capsule is sleeved at outside of the coal sample chamber. According to the experimental result observed by a pressure acquisition device and a camera, the invention is capable of simultaneously inspecting the actions of the gas pressure and terrestrial stress in the initiation, start and development of the coal and gas burst through the simulation of coaction of the terrestrial stress and atmospheric pressure to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the pressure value is capable of being regulated to observe the experimental results under different pressure and the simulation of terrestrial stress or gas pressure only, so that 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 outburst hazard test unit.
Background technology
Coal and gas burst accident are meant in the process of coal mining; Coal body is under terrestrial stress and gas acting in conjunction; Broken coal and gas is by unexpected unusual dynamic phenomenon of dishing out to the digging space in coal body or the rock mass, show as several tons to thousands of tons of even the coal petrography that reaches the fragmentation more than ten thousand tons in second time several seconds to tens, dish out to the digging space by coal and rock; Gush out with a large amount of gas simultaneously, endanger comparatively serious.
Coal and gas are outstanding to be dynamic disaster the most serious under the 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.The occurrence form of gas has free state and ADSORPTION STATE in the coal; Wherein adsorption gas accounts for about 90% of whole gas bearing capacities; The gas of free state and the gas of ADSORPTION STATE role in coal and the outstanding process of gas is not clear at present; (this part deletes), but terrestrial stress and gas pressure are acting it be not immediately clear how in the outstanding overall process of coal and gas, and the destructive process of coal body also fails to see intuitively always.Coal and gas are outstanding to belong to geologic hazard, for a long time, owing to can't observe directly coal and the outstanding destructive process of gas, and also with regard to unpredictable and prevention, therefore, because the outstanding accident that causes of coal and gas is also relatively more frequent.And simulation coal and gas burst experiment can be research, prediction and prevention coal and the outstanding theoretical foundation that provides of gas.
Therefore, need a kind of experimental provision, can simulated ground stress and the pressure of gas, clearly observe and write down the simulation coal with gas the state when outstanding, the destructive process of Direct observation coal, prediction and the prevention given prominence to for coal and gas provide theoretical foundation.
Summary of the invention
In view of this; The present invention provides a kind of coal and gas outburst hazard test unit; Can simulated ground stress and the pressure of gas; Clearly observe and write down simulation coal and the gas state when outstanding, the destructive process of Direct observation coal, prediction and the prevention given prominence to for coal and gas provide theoretical foundation.
Coal of the present invention and gas outburst hazard test unit comprise coal sampling mill, terrestrial stress simulated loading system and air pressure loading equipemtn, and said coal sampling mill is provided with coal and gas blower; Coal and gas blower are provided with valve; Also comprise closed container, the pressurized gas passage of said air pressure-loading equipment communicates with closed container inside, and the terrestrial stress simulated loading system comprises pressurising equipment, is arranged on Shili Capsule and charger in the closed container; The capsule wall of said Shili Capsule is the interlayer setting; The pressurising passage of pressurising equipment communicates with the capsule wall interlayer, and charger comprises at least two loading blocks, and said coal sampling mill is surrounded by at least two loading blocks; Have the gap between the adjacent load piece, said Shili Capsule is enclosed within the coal sampling mill outside; Said coal and gas blower are arranged on the closed container outside;
Also comprise pressure acquisition device and video camera, said pressure acquisition device is arranged in the coal sampling mill, the location transparency setting that coal sampling mill and video camera are relative.
Further, said Shili Capsule is the cylindrical of upper and lower opening, and the coal sampling mill that is surrounded by loading blocks is the cylindrical of upper and lower opening;
Further, said closed container is cylindrical, and the end socket that closed container is corresponding with the coal sampling mill upper shed is transparent setting, and it is outside that said video camera is arranged on transparent end socket;
Further, also comprise controller, said pressure acquisition device is a pressure transducer, and said video camera links to each other with controller respectively with pressure transducer;
Further, be marked with fluid sealant in the gap between the adjacent load piece;
Further, said coal sampling mill is surrounded by four measure-alike loading blocks;
Further, said pressurising equipment is air compressor, and the air compressor gas outlet connects the Shili Capsule interlayer through the pressurising passage; Air pressure-loading equipment is the gas gas cylinder;
Further, said operation valve is a solenoid valve, and the command input end of said solenoid valve connects controller;
Further, coal is connected coal sampling mill with gas blower through bleed pipe, seals through the O RunddichtringO between said bleed pipe and pressurising passage and the closed container wall.
Beneficial effect of the present invention: coal of the present invention and gas outburst hazard test unit; Adopt the pressue device and the closed container structure of capsule shape simulated ground stress; Simulated ground stress and gas pressure are to the comprehensive pressure of coal seam (sample) generation uniformly; After the release, under the acting in conjunction of simulated ground stress and air pressure, make coal and gas from coal and gas blower suddenly; Can investigate simultaneously gas pressure and terrestrial stress outstandingly breed at coal and gas, start with evolution in role, prediction and the prevention given prominence to for coal and gas provide theoretical foundation; Can adjust pressure value during use, observe the test findings under the different pressures, can also only perhaps only make an experiment under the situation with gas pressure, use flexibly with simulated ground stress; The present invention is simple in structure, volume is little, cost of manufacture is low, realizes that with lower cost and simple structure serialization and visual monitoring coal and gas are outstanding, operates fairly simple.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is a structural representation of the present invention;
Fig. 2 be Fig. 1 along A-A to cut-open view.
Embodiment
Fig. 1 is a structural representation of the present invention, Fig. 2 be Fig. 1 along A-A to cut-open view, as shown in the figure: the coal of present embodiment and gas outburst hazard test unit; Comprise coal sampling mill 5, terrestrial stress simulated loading system and air pressure loading equipemtn 15; Coal sampling mill 5 is provided with coal and gas blower 3, and coal and gas blower 3 are provided with operation valve 4, and the operation valve 4 in the present embodiment is a solenoid valve; The control simple and sensitive improves the confidence level of test;
Also comprise closed container 1, the pressurized gas passage of air pressure-loading equipment communicates with closed container 1 inside, and the terrestrial stress simulated loading system comprises pressurising equipment 13, is arranged on Shili Capsule 7 and charger in the closed container 1; The capsule wall of Shili Capsule 7 is the interlayer setting; The pressurising passage 14 of pressurising equipment communicates with the capsule wall interlayer, and charger comprises four loading blocks 6, and coal sampling mill 5 is surrounded by four loading blocks 6; Adopt four loading blocks; Can make the coal sample locular wall that loading blocks surrounds keep sufficient intensity, make that coal sample is stressed more to approach virtual condition, and uniform state around stressed being; There is the gap between the adjacent load piece 6, loading blocks can be moved radially, be marked with fluid sealant 11 in the gap between the adjacent load piece 6, guarantee to exist between the loading blocks globality and can same moved further, make the simulate effect of terrestrial stress truer; Shili Capsule 7 is enclosed within the coal sampling mill outside; Coal and gas blower 3 are arranged on closed container 1 outside; In the present embodiment, Shili Capsule 7 is the cylindrical of upper and lower opening, and the coal sampling mill 5 that is surrounded by loading blocks 6 is the cylindrical of upper and lower opening; Make simulated ground stress can from around act on coal sample in the coal sampling mill uniformly; More approach virtual condition, simultaneously, can be under the condition that does not increase the loading equipemtn cost; Improve the coal sample size greatly, make test more true to nature;
Also comprise pressure acquisition device 9, controller 8 and video camera 10, the command input end of solenoid valve 4 connects controller 8, is controlled as the case may be by controller; In the present embodiment; The data collector adopts pressure sensor, video camera 10 links to each other with controller 8 respectively with pressure transducer, adopt data accurately and timely; Pressure acquisition device 9 is arranged in the coal sampling mill 5; The end socket 12 that closed container 1 is corresponding with coal sampling mill 5 upper sheds is transparent setting, and said video camera 10 is arranged on transparent end socket 12 outsides, makes things convenient for video camera to take; Closed container 1 adopts cylindrical structural, and compact conformation, volume are little; Can gather and control video camera and valve automatically through controller, realize intellectualized operation;
In the present embodiment, pressurising equipment 13 is air compressor, and the air compressor gas outlet connects the Shili Capsule interlayer through pressurising passage 14; Air pressure-loading equipment 15 is the gas gas cylinder, obtains easily, and installation and maintenance are simple; Coal is connected coal sampling mill with gas blower 3 through bleed pipe 2, through O RunddichtringO sealing, seals simple and reliablely between bleed pipe 2 and pressurising passage 14 and closed container 1 wall, and cost of manufacture is low.
The present invention puts coal dust in the coal sampling mill in use, starts pressurising equipment to Shili Capsule inflation (or topping up); Shili Capsule expands; Interior circle is installed control valve to loading blocks external pressure compacting pulverized coal forming coal on the bleed pipe of coal and gas blower, can be that magnetic valve also can be a pneumatic operated valve; Inflate in closed container and coal sampling mill through the gas gas cylinder, keep air pressure a period of time, gas is fully adsorbed; Open the control valve of coal and gas blower,, coal sample is destroyed under crustal stress and gas pressure effect based on the size of coal and gas blower size; And coal and gas or independent gas are taken small coal and are dished out from coal and gas blower; Simultaneously, video camera and sensor obtain image and pressure parameter, the destructive process and the gas pressure change of controller record coal; The present invention can also adjust pressure parameter and carry out test of many times; After the test completion, analyze the destructive process and the reason thereof of coal, investigate the control action that crustal stress, gas pressure and coal body physical mechanics property are verified and given prominence in the outstanding process of coal and gas.
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 specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. coal and gas outburst hazard test unit comprise coal sampling mill, terrestrial stress simulated loading system and air pressure loading equipemtn, and said coal sampling mill is provided with coal and gas blower; Coal and gas blower are provided with operation valve; It is characterized in that: also comprise closed container, the pressurized gas passage of said air pressure-loading equipment communicates with closed container inside, and the terrestrial stress simulated loading system comprises pressurising equipment, is arranged on Shili Capsule and charger in the closed container; The capsule wall of said Shili Capsule is the interlayer setting; The pressurising passage of pressurising equipment communicates with the capsule wall interlayer, and charger comprises at least two loading blocks, and said coal sampling mill is surrounded by at least two loading blocks; Have the gap between the adjacent load piece, said Shili Capsule is enclosed within the coal sampling mill outside; Said coal and gas blower are arranged on the closed container outside; Said Shili Capsule is the cylindrical of upper and lower opening, and the coal sampling mill that is surrounded by loading blocks is the cylindrical of upper and lower opening;
Also comprise pressure acquisition device and video camera, said pressure acquisition device is arranged in the coal sampling mill, the location transparency setting that coal sampling mill and video camera are relative.
2. coal according to claim 1 and gas outburst hazard test unit is characterized in that: said closed container is cylindrical, and the end socket that closed container is corresponding with the coal sampling mill upper shed is transparent setting, and it is outside that said video camera is arranged on transparent end socket.
3. coal according to claim 2 and gas outburst hazard test unit is characterized in that: also comprise controller, said pressure acquisition device is a pressure transducer, and said video camera links to each other with controller respectively with pressure transducer.
4. coal according to claim 3 and gas outburst hazard test unit is characterized in that: be marked with fluid sealant in the gap between the adjacent load piece.
5. coal according to claim 4 and gas outburst hazard test unit is characterized in that: said coal sampling mill is surrounded by four measure-alike loading blocks.
6. coal according to claim 5 and gas outburst hazard test unit is characterized in that: said pressurising equipment is air compressor, and the air compressor gas outlet connects the Shili Capsule interlayer through ramjet duct; Air pressure-loading equipment is the gas gas cylinder.
7. coal according to claim 6 and gas outburst hazard test unit is characterized in that: said operation valve is a solenoid valve, and the command input end of said solenoid valve connects controller.
8. coal according to claim 7 and gas outburst hazard test unit is characterized in that: coal is connected coal sampling mill with gas blower through bleed pipe, seals through the O RunddichtringO between said bleed pipe and ramjet duct and the closed container wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101031542A CN101487834B (en) | 2009-02-06 | 2009-02-06 | Combined test apparatus for coal and gas burst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101031542A CN101487834B (en) | 2009-02-06 | 2009-02-06 | Combined test apparatus for coal and gas burst |
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| CN101487834A CN101487834A (en) | 2009-07-22 |
| CN101487834B true CN101487834B (en) | 2012-03-28 |
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| CN2009101031542A Expired - Fee Related CN101487834B (en) | 2009-02-06 | 2009-02-06 | Combined test apparatus for coal and gas burst |
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Cited By (1)
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| CN108387703A (en) * | 2018-01-25 | 2018-08-10 | 西安科技大学 | A kind of coal and gas prominent integrated experiment device |
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