CN203455329U - Simulating device for stimulating coal and gas outburst of drill hole - Google Patents
Simulating device for stimulating coal and gas outburst of drill hole Download PDFInfo
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- CN203455329U CN203455329U CN201320284459.XU CN201320284459U CN203455329U CN 203455329 U CN203455329 U CN 203455329U CN 201320284459 U CN201320284459 U CN 201320284459U CN 203455329 U CN203455329 U CN 203455329U
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- boring
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Abstract
The utility model relates to a simulating device for stimulating the coal and gas outburst of a drill hole. The simulating device comprises a kiloton pressure testing machine, a rectangular cylinder body, a sealed rigid piston, formed lump coal, a hole-provided gas guide tube, coal diameter laser testers, pressure sensors, an electric control valve, a protruded drill hole, methane inlets, a three-way valve, a methane steel cylinder and a vacuum pump. The simulating device is characterized in that the pressure sensors and the methane inlets are respectively arranged at the front end and rear end of the rectangular cylinder body, the electric control valve and the two coal diameter laser testers are mounted on the protruded drill hole in the front end of the cylinder body, the hole-provided gas guide tube penetrating through coal briquette is welded to the bottom end of the drill hole, and the sealed rigid piston is loaded to the formed lump coal in the cylinder body. According to the simulating device, by carrying out repeated gas injection, pressure maintaining and gas release on the rectangular cylinder body, the coal and the gas are compressed into the gas guide tube to cause outburst so as to simulate the preparing and starting stages of the coal and gas outburst of the drill hole; and by observing the counts of the coal diameter laser testers, the damage degrees of the different gas pressures or ground stresses to the coal can be compared.
Description
Technical field
The utility model relates to a kind of analogue means that excites boring coal and Gas Outburst.
Background technology
Coal and Gas Outburst are large disasters that may occur in coal production, and it refers in rib, spray suddenly the dynamic phenomenon of coal and gas to mining work space in a short period of time, outstandingly can destroy roadway facility, cause casualties.The features such as the outstanding preparatory stage of coal and gas has terrestrial stress and gas energy savings, and coal body is inhomogeneous, and outstanding unloading phase, coal body destroyed ejection under terrestrial stress gradient, gas pressure gradient, coal body effect of weight.By foundation, excite controlled layer-through drilling coal and Gas Outburst model, with the gas injection pressurize of entity coal and simulation boring, gather gas energy, complete the mechanism experiment of outstanding preparation.Abrupt release gas injection pressure, forms the onset dynamics experiment that excites coal and Gas Outburst of gas pressure gradient.By parameters such as gas injection repeatedly in analogue means, pressurize and monitoring gas injection pressures, excite with keyhole coal and Gas Outburst occur repeatedly, the coal of one of traditional coal mining disaster and Gas Outburst are studied as the power of a kind of coal mining and mash gas extraction.
Summary of the invention
For simulate boring coal and Gas Outburst preparatory stage and unloading phase, the utility model, in coal and Gas Outburst theoretical foundation, provides a kind of for exciting the analogue means of hole coal and Gas Outburst, this device is easy to use, safe.
The utility model be simulation hole outstanding preparation and unloading phase the technical scheme that adopts be: a kind of analogue means that excites boring coal and Gas Outburst, by kiloton pressure testing machine, rectangular parallelepiped cylinder body, sealing rigidity piston, moulding lump coal, wireway with holes, coal footpath laser determination instrument, pressure transducer, electric control valve, give prominence to boring, methane air intake opening, T-valve, methane steel cylinder, vacuum pump and form.Rectangular parallelepiped cylinder body front end is provided with forefront pressure sensor and front end methane air intake opening and the outstanding boring that electric control valve and two coal footpath laser determination instrument are housed, boring bottom is provided with the wireway with holes that penetrates moulding lump coal, and rear end of the cylinder block is provided with rear end pressure transducer and rear end methane air intake opening.The steel pipe being welded on rectangular parallelepiped cylinder body front end methane air intake opening directly connects front end methane steel cylinder, and the steel pipe of rear end methane air intake opening welding connects rear end methane steel cylinder and vacuum pump by T-valve.Loaded on the moulding lump coal in cylinder body by the sealing rigidity piston of kiloton pressure testing machine pressurization.
Effect of the present utility model is: the moulding lump coal patrix that the sealing rigidity piston under artesian condition loads in cylinder body is intended the impact of terrestrial stress on coal and Gas Outburst, by front end methane air intake opening, to coal body, inject 0.5Mpa methane and simulate the stress state of original coal (pressure state while now not reaching outstanding), by rear end methane air intake opening gas injection, make gas pressure in coal body reach the simulation of 1Mpa (or more than) gas pressure state when outstanding again, complete the outstanding mechanism experiment of preparing.Until rear and front end pressure sensor readings identical and stable after open electric control valve, abrupt release gas injection pressure, form the onset dynamics experiment that excites coal and Gas Outburst of gas pressure gradient, a large amount of coals and gas are pressed into after wireway with holes by the simulation ejection of holing, the quantity of different big or small broken coals in scope can be surveyed in laser determination instrument record in coal footpath, once experiment finish after gas injection again, pressurize complete experiment for the second time.
The utility model has the following advantages: structure is simpler, easy to use, the outstanding preparation of boring and onset dynamics experiment are simulated in gas injection pressurize repeatedly, electric control valve can be avoided causing casualties in outstanding process, coal footpath laser determination instrument can more different gas pressures or terrestrial stress to coal body destructiveness.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing 1 is the utility model one-piece construction schematic diagram.
In figure: 1-kiloton pressure testing machine, 2-rectangular parallelepiped cylinder body, 3-sealing rigidity piston, 4-moulding lump coal, 5-wireway with holes, 6-coal footpath laser determination instrument, 7-forefront pressure sensor, 8-rear end pressure transducer, 9-electric control valve, the outstanding boring of 10-, 11-front end methane air intake opening, 12-rear end methane air intake opening, 13-T-valve, 14-front end methane steel cylinder, 15-rear end methane steel cylinder, 16-vacuum pump.
Embodiment
Now the utility model is described in further detail by reference to the accompanying drawings.
Excite an analogue means for boring coal and Gas Outburst, by kiloton pressure testing machine (1), rectangular parallelepiped cylinder body (2), sealing rigidity piston (3), moulding lump coal (4), wireway with holes (5), coal footpath laser determination instrument (6), forefront pressure sensor (7), rear end pressure transducer (8), electric control valve (9), outstanding boring (10), front end methane air intake opening (11), rear end methane air intake opening (12), T-valve (13), front end methane steel cylinder (14), rear end methane steel cylinder (15), vacuum pump (16), formed.Cylinder body front end is provided with forefront pressure sensor (7) and front end methane air intake opening (11) and the outstanding boring of simulation (10) that electric control valve (9) and two coal footpath laser determination instrument (6) are housed, and boring bottom utilizes connector to be provided with to penetrate the wireway with holes (5) of moulding lump coal (4).Rear end of the cylinder block is provided with rear end pressure transducer (8) and rear end methane air intake opening (12).Rectangular parallelepiped cylinder body front end methane air intake opening (11) directly connects front end methane steel cylinder (14) by the steel pipe being welded on air intake opening, and rear end methane air intake opening (12) steel pipe connects rear end methane steel cylinder (15) and vacuum pump (16) by T-valve.Loaded on the moulding lump coal (4) in cylinder body by the sealing rigidity piston (3) of kiloton pressure testing machine (1) pressurization.
During experiment, ready-made moulding lump coal (4) layering is put into uniformly to cylinder body (2) (there is certain groove in the upper and lower coal seam of wireway with holes to be pressed on wireway), start kiloton pressure testing machine (1) crush seal rigidity piston (3) and to coal seam, apply certain pressure, rear end of the cylinder block T-valve (13) is connected to vacuum pump (16), open gas in vacuum pump extraction coal body and make cylinder interior coal seam degassed, after completing, T-valve is connected to rear end methane steel cylinder (15).Open front end methane steel cylinder (14) and to coal body injection 0.5Mpa pressure, simulate the stress state of raw coal by front end methane air intake opening (11), after forefront pressure sensor (7) and rear end pressure transducer (8) stable reading, open the switch of rear end methane steel cylinder (15), pressure 1Mpa while making to reach outstanding in cylinder to coal body gas injection by rear end methane air intake opening (12) (or more than), Deng former and later two pressure sensor readings stable and approach 1Mpa (or more than) after open the electric control valve (9) in outstanding boring (10), observe coal footpath laser determination instrument (6) reading, above process simulation boring coal and Gas Outburst preparation and unloading phase.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model is limited; in the scope of spirit of the present utility model and claim protection, any modification and change that the utility model is made, all fall into the scope that the utility model is protected.
Claims (2)
1. an analogue means that excites boring coal and Gas Outburst, comprises kiloton pressure testing machine (1), rectangular parallelepiped cylinder body (2), sealing rigidity piston (3), moulding lump coal (4), wireway with holes (5), coal footpath laser determination instrument (6), forefront pressure sensor (7), rear end pressure transducer (8), electric control valve (9), outstanding boring (10), front end methane air intake opening (11), rear end methane air intake opening (12), T-valve (13), front end methane steel cylinder (14), rear end methane steel cylinder (15), vacuum pump (16), is characterized in that: the rectangular parallelepiped cylinder body (2) being fixed on base is provided with forefront pressure sensor (7), front end methane air intake opening (11), outstanding boring (10) and rear end pressure transducer (8), rear end methane air intake opening (12), the steel pipe of front end methane air intake opening (11) welding directly connects front end methane steel cylinder (14), the steel pipe of rear end methane air intake opening (12) welding connects rear end methane steel cylinder (15) and vacuum pump (16) by T-valve (13), electric control valve (9) is arranged on outstanding boring (10) near cylinder body end, the wireway with holes (5) that penetrates moulding lump coal (4) utilizes the connector of outstanding boring (10) bottom welding to be connected with boring, loaded on the moulding lump coal (4) in cylinder body by the sealing rigidity piston (3) of kiloton pressure testing machine (1) pressurization.
2. the analogue means of boring coal according to claim 1 and Gas Outburst, is characterized in that: outstanding boring (10) is provided with laterally zygomorphic two coal footpath laser determination instrument (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320284459.XU CN203455329U (en) | 2013-05-23 | 2013-05-23 | Simulating device for stimulating coal and gas outburst of drill hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320284459.XU CN203455329U (en) | 2013-05-23 | 2013-05-23 | Simulating device for stimulating coal and gas outburst of drill hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203455329U true CN203455329U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320284459.XU Expired - Fee Related CN203455329U (en) | 2013-05-23 | 2013-05-23 | Simulating device for stimulating coal and gas outburst of drill hole |
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| CN (1) | CN203455329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792616A (en) * | 2015-04-03 | 2015-07-22 | 河南理工大学 | Simulating device and method for diameter change rule of gas extraction borehole |
| CN106442265A (en) * | 2016-10-14 | 2017-02-22 | 安徽理工大学 | Coal and rock permeability-increasing test system under weak gas explosion induction |
-
2013
- 2013-05-23 CN CN201320284459.XU patent/CN203455329U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792616A (en) * | 2015-04-03 | 2015-07-22 | 河南理工大学 | Simulating device and method for diameter change rule of gas extraction borehole |
| CN104792616B (en) * | 2015-04-03 | 2017-08-25 | 河南理工大学 | A kind of mash gas pumping drilling varying aperture rule analogue means and analogy method |
| CN106442265A (en) * | 2016-10-14 | 2017-02-22 | 安徽理工大学 | Coal and rock permeability-increasing test system under weak gas explosion induction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20150523 |
|
| EXPY | Termination of patent right or utility model |