CN102735802A - Coal gas surface filling device applicable to model test - Google Patents
Coal gas surface filling device applicable to model test Download PDFInfo
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- CN102735802A CN102735802A CN201210227229XA CN201210227229A CN102735802A CN 102735802 A CN102735802 A CN 102735802A CN 201210227229X A CN201210227229X A CN 201210227229XA CN 201210227229 A CN201210227229 A CN 201210227229A CN 102735802 A CN102735802 A CN 102735802A
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Abstract
The invention discloses a coal gas surface filling device applicable to a model test. The coal gas surface filling device comprises an inflation panel, wherein one end of the inflation panel is connected with an inflation pipeline; an inflation switch is arranged on the inflation pipeline; the inflation panel comprises a panel; the panel is provided with gas guide grooves which are vertically and horizontally crossed and communicated; the gas guide grooves are communicated with the inflation pipeline through an inflation channel at the end part of the panel; a lower sieve plate, a steel wire gauze and an upper sieve plate are orderly arranged on the panel; the edge joint of the lower sieve plate, the steel wire gauze, the upper sieve plate and the panel is sealed by a rubber sealing strip; a fixed pressing strip is arranged on the edge of the sieve plate, and the lower sieve plate, the steel wire gauze and the upper sieve plate are fixed on the panel through bolts. The coal gas surface filling device can carry out large-area uniform and fast gas filling on a test coal seam, has good gas permeability and boundary binding character, can filter fine pulverized coal, and does not destroy the model or leak air from the side; the flow and pressure are adjustable; the safety is high; the structure is simple; the performance is excellent; the price is low, and maintenance and exchange are convenient.
Description
Technical field
The present invention relates to a kind of gas test unit, the coal body Device in Gas dignity formula device for filling of the outstanding model test of especially a kind of high gas bearing mine coal and gas.
Background technology
Coal and gas are outstanding to be a kind of extraordinary serious natural calamity of serious threat coal mine downhole safety.Along with the increase of China's coal-mine mining depth, the outstanding situation of coal and gas is severe more, and the large-scale model test of studying its rule accordingly is also a large amount of carrying out.And one of successful key factor of the outstanding model test of coal and gas is exactly the filling of methane gas.
Abroad; The USSR (Union of Soviet Socialist Republics) just carried out the outstanding simulated experiment of one dimension and has developed corresponding test unit in the 1950's, and test only shows that under very big gas pressure gradient (each centimetre gas pressure descend several MPas) coal just might be broken and dish out.Sixties in 20th century subsequently; Japan Xue Zheshi is flat increase also carry out gas impelling coal particle test in the laboratory; Utilizing crystal ice, rosin, cement, the coal grain of carbon dioxide to make porous media model, to be used for simulation outstanding; Test causes the fragmentation of material and dishes out under porous medium hole gas pressure, develop into the outstanding simulation test of taking all factors into consideration reservoir stress and gas pressure of the similar USSR (Union of Soviet Socialist Republics) at last.
At home; Early 1980s; The king of Fushun branch of coal science institute helps peace through the collection in worksite coal sample, the moulding in the laboratory, simulation IV, V class outburst danger coal; Carry out the outstanding one dimension simulation test research of coal and gas, drawn the quantitative relationship between the same perpendicular stress of intensity of outburst, the gas pressure under the one-dimensional condition.1996, the Meng Xiang of mechanics institute of Chinese Academy of Sciences people such as jump developed and can change two-dimentional coal and the gas burst experiment device that terrestrial stress can change gas pressure again.2000; The Guo Li of China Mining University is steady, Yu Qixiang, Jiang Chenglin give prominence to device through the coal of exploitation with gas and studied the temperature variation in the outstanding process; Think in coal and the outstanding process of gas; The rising of coal body temperature discharges elastic energy by the terrestrial stress broken coal and causes, and temperature reduces then because the methane gas desorb causes with expanding, and its variation is to raise earlier afterwards to reduce and continually varying.2000; The Niu Guoqing of Jiaozuo Institute of Technology, face Aiwa, Liu Mingju etc. have also designed coal and the outstanding device of gas; Be used for investigating the temperature variation in coal and the outstanding process of gas; Result of study is thought in coal and the outstanding process of gas, the expansion acting process and the diabatic process of gas, but a polytropic process that approaches isothermal process.In 2004, Cai of Jiaozuo Institute of Technology successfully waited and has designed three-dimensional coal and gas outburst simulation test device according to similarity theory subsequently.Test simulation the outstanding process of coal and the gas under different coal type intensity, three-dimensional stress, the gas pressure condition.
2008, application number was that the Chinese patent of 200810069276.X discloses a kind of coal and gas outburst simulation test platform, and this invention to the coal sample axial pressure, to coal sample in is filled gas through inflation inlet through many group hydraulic jack; The device aspis is implemented mechanization through quick release mechanism and is controlled automatically.The foam metal plate is adopted in inflation, utilizes the gas penetration potential of foam metal, realizes " face inflation ".
Application number is that 200810233048.1 Chinese patent discloses a kind of coal and mash gas extrusion mold, and the upper surface of this die bottom plate offers the rectangle deep gouge, is embedded screen pack on the deep gouge, and screen pack also adopts foam metal to realize " face inflation ".The foam metal voids content is high, and pore diameter can reach to the millimeter level, but with respect to hundreds of purpose coal dust, hole still is bigger than normal, and foam metal is difficult for buying on market.In addition, gas filling is not that independent device and the whole test All-China Federation of Taiwan Compatriots are in one.
2011; Application number is that 201120016771.1 Chinese patent discloses a kind of coal and gas burst experiment analogue means; Comprise coal sampling mill and air pressure loading equipemtn; Be provided with the coal sample die cavity that at least one is used to place coal sample in the described coal sampling mill, air pressure-loading equipment comprises the pressurized gas passage that the gas gas cylinder connects, and pressurized gas passage is connected with coal sample die cavity in the coal sampling mill.This device still adopts the point type filling model of coal body methane gas.
Though above test unit has been deepened the progress of coal and gas outburst mechanism to a certain extent, more or less have a following shortcoming:
1) present; The gas-loaded equipment of the outstanding model test of coal and gas is to be connected with coal sample die cavity in the coal sampling mill through pressurized gas passage; The air inlet source is " some inflation " mostly, and this methane gas filling method has caused that inflation is inhomogeneous, aeration speed is slow, forms gas in the gas replenishment process easily and piles up; Increase local gas pressure, have a strong impact on test effect.
2) foam metal is as ventilative panel, and with respect to hundreds of purpose coal dust, hole is bigger than normal, and cost is higher, be difficult for buying, thereby this " face inflation " mode is difficult for widespread use.
3) in pumping process, the easy sucking-off solid particle of present gas-loaded mode forms big cavity in model, and the globality of damage model adopts foam metal easy blocking hole, thereby influences test effect.
4) the present coal body Device in Gas dignity formula device for filling that also independently is not applicable to model test, gas face formula device for filling is not realized modular design, can not adjust according to actual conditions and testing requirements, is unfavorable for maintenance.
Summary of the invention
The objective of the invention is provides a kind of modular design for overcoming the deficiency of above-mentioned prior art, the coal body Device in Gas dignity formula device for filling that is applicable to model test that large-scale coal body model is carried out the gas filling that can be quick, even, stable.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of coal body Device in Gas dignity formula device for filling that is applicable to model test; Comprise the inflation panel; Inflation panel one end links to each other with gas ducting, and gas ducting is provided with gas-filled switching tube, and said inflation panel comprises panel; Panel is provided with the air slot of intersection connection in length and breadth, and air slot is communicated with gas ducting through the filling channel of panel end; Be provided with lower floor's sieve plate, woven wire and upper strata sieve plate above the said panel successively; The junction, edge of said lower floor sieve plate, woven wire, upper strata sieve plate and panel is through the rubber weather strip sealing; And fixedly press strip is set in the upper sieve panel edges of topmost, fixedly press strip is fixed on lower floor's sieve plate, woven wire, upper strata sieve plate on the panel through bolt.
Said woven wire is to weave the ultra dense woven wire more than softness 1000 orders that form by ultra-fine tough high tensile steel wire.
Said upper strata sieve plate and lower floor's sieve plate are the high tensile thin steel plate of the regularly arranged round through hole that gathers on it.
During assembling; Panel upper surface is laid lower floor's sieve plate, the above woven wire of 1000 orders and upper strata sieve plate successively; Sealing up around panel, lower floor's sieve plate, the above woven wire of 1000 orders and the sieve plate joint, upper strata, spread fixedly press strip then on rubber weather strip top with rubber weather strip through the bolt composition that closely links together.Gas ducting is connected with it through the filling channel on the panel side.The size of panel can be adjusted according to the size of test coal body flexibly.
The present invention can be widely used in the outstanding model test of coal and gas.The present invention in use; Size and particular location according to test model filling coal body; The bottom in coal seam or is all around fixed or be placed on to gas face formula device for filling, the gas feed flange of the gases at high pressure filling pipeline joint face formula device for filling through sealing counter-force model equipment.Need be furnished with high pressure gas gas intelligence when coal body Device in Gas dignity formula device for filling uses and raise the clothes backfill control system, the two connects through the gases at high pressure filling pipeline.During test, high pressure gas gas intelligence is raised the clothes backfill control system and is at first formed negative pressure, is extracted out by face formula device for filling through the gas-filled switching tube of opening through the empty body that the gases at high pressure filling pipeline will be tested in the coal body, makes in the test model coal body and forms vacuum; Set the pressure and the flow parameter of gas filling then; Methane gas charges into coal body Device in Gas dignity formula device for filling through the gas-filled switching tube of opening; Bury gaseous tension and concentration sensor in the test model coal body underground; When the gas parameter reached setting value in the coal body, final completion was filled methane gas for the test model coal body.Keep gas parameter constant in the coal body in the outstanding process of coal and gas.
The present invention has following significant technical advantage with the gas-loaded apparatus in comparison that has the outstanding model test of coal and gas both at home and abroad now:
(1) this contrive equipment can carry out even, the gas filling fast of large tracts of land to the test coal seam, has solved at present the long shortcoming of gas-loaded equipment recharge cycle both at home and abroad.
(2) this contrive equipment has been laid two-layer steel sieve and one deck 1000 purpose woven wires; Adopt all around rubber weather strip and fixedly press strip fix; Have good gas permeability and boundary constraint property; Can filter tiny coal dust in the pumping process, damage model does not guarantee not side leakage gas in the filling methane gas process.
(3) test unit is provided with gas switch, is connected with the gas filling control system, has guaranteed flow, adjustable in pressure and security in the methane gas stowing operation.
(4) this invention test unit is simple in structure, superior performance, and low price can be according to the processing of test inflation area requirements, convenient for maintaining and replacing.Can be widely used in the methane gas filling of the outstanding model test of coal and gas.Have a extensive future remarkable in economical benefits.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is a vertical view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a panel construction synoptic diagram of the present invention.
1. lower floor's sieve plates among the figure, 2.1000 order woven wires, 3. upper strata sieve plate, 4. bolt, 5. fixing press strip, 6. rubber weather strip, 7. panel, 8. air slot, 9. gas ducting, 10. gas feed flange, 11. gas-filled switching tubes, 12. filling channels.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Like Fig. 1-shown in Figure 4; Inflation panel one end links to each other with gas ducting 9, and gas ducting 9 is provided with gas-filled switching tube 11, and the inflation panel comprises panel 7; Panel 7 is provided with the air slot 8 of intersection connection in length and breadth, and air slot 8 is communicated with gas ducting 9 through the filling channel 12 of panel end; Be provided with lower floor's sieve plate 1,1000 order woven wires and upper strata sieve plate 3 above the panel 7 successively; The junction, edge of lower floor's sieve plate 1,1000 order woven wires 2, upper strata sieve plate 3 and panel 7 is through rubber weather strip 6 sealings; And on the upper strata of topmost sieve plate 3 edges are provided with fixedly press strip 5, fixedly press strip 5 is fixed on lower floor's sieve plate 1,1000 order woven wires 2, upper strata sieve plate 3 on the panel 7 through bolt 4.
During installation; Panel 7 upper surfaces are laid lower floor's sieve plate 1,1000 order woven wires 2 and upper strata sieve plate 3 successively; Sealing up around panel 7, lower floor's sieve plate 1,1000 order woven wires 2 and upper strata sieve plate 3 joints, spread fixedly press strip 5 then on rubber weather strip 6 tops with rubber weather strip 6 through the bolt composition that closely links together.Gas ducting 9 is connected with it through the filling channel 12 on panel 7 sides.The size of the sized panel of panel 7 can be adjusted according to the size of test coal body flexibly.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present invention; One of ordinary skill in the art should be understood that; On the basis of technical scheme of the present invention, those skilled in the art need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (3)
1. coal body Device in Gas dignity formula device for filling that is applicable to model test; Comprise the inflation panel, inflation panel one end links to each other with gas ducting, and gas ducting is provided with gas-filled switching tube; It is characterized in that; Said inflation panel comprises panel, and panel is provided with the air slot of intersection connection in length and breadth, and air slot is communicated with gas ducting through the filling channel of panel end; Be provided with lower floor's sieve plate, woven wire and upper strata sieve plate above the said panel successively; The junction, edge of said lower floor sieve plate, woven wire, upper strata sieve plate and panel is through the rubber weather strip sealing; And fixedly press strip is set in the upper sieve panel edges of topmost, fixedly press strip is fixed on lower floor's sieve plate, woven wire, upper strata sieve plate on the panel through bolt.
2. device as claimed in claim 1 is characterized in that, said woven wire is the softness 1000 order woven wires that formed by ultra-fine tough high tensile steel wire braiding.
3. according to claim 1 or claim 2 device is characterized in that, said upper strata sieve plate and lower floor's sieve plate are the high tensile thin steel plate of the regularly arranged round through hole that gathers on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227229.XA CN102735802B (en) | 2012-07-03 | 2012-07-03 | Coal gas surface filling device applicable to model test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227229.XA CN102735802B (en) | 2012-07-03 | 2012-07-03 | Coal gas surface filling device applicable to model test |
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| CN102735802A true CN102735802A (en) | 2012-10-17 |
| CN102735802B CN102735802B (en) | 2014-06-25 |
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| CN201210227229.XA Expired - Fee Related CN102735802B (en) | 2012-07-03 | 2012-07-03 | Coal gas surface filling device applicable to model test |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU796459A1 (en) * | 1978-12-11 | 1981-01-15 | Восточный Научно-Исследовательскийинститут По Безопасности Работ Вгорной Промышленности | Device for simulating instant coal and gas outburst |
| CN201170783Y (en) * | 2008-01-22 | 2008-12-24 | 重庆大学 | Simulation pressure-testing case for rock formation stress |
| CN201285392Y (en) * | 2008-11-14 | 2009-08-05 | 重庆大学 | Mold for coal and firedamp projecting simulator experiment |
| CN102507865A (en) * | 2011-10-21 | 2012-06-20 | 山东科技大学 | Simulation test system of coal-gas outburst during rock cross-cut coal uncovering |
| CN202693549U (en) * | 2012-07-03 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Plane-type coal gas filling device applicable to model test |
-
2012
- 2012-07-03 CN CN201210227229.XA patent/CN102735802B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU796459A1 (en) * | 1978-12-11 | 1981-01-15 | Восточный Научно-Исследовательскийинститут По Безопасности Работ Вгорной Промышленности | Device for simulating instant coal and gas outburst |
| CN201170783Y (en) * | 2008-01-22 | 2008-12-24 | 重庆大学 | Simulation pressure-testing case for rock formation stress |
| CN201285392Y (en) * | 2008-11-14 | 2009-08-05 | 重庆大学 | Mold for coal and firedamp projecting simulator experiment |
| CN102507865A (en) * | 2011-10-21 | 2012-06-20 | 山东科技大学 | Simulation test system of coal-gas outburst during rock cross-cut coal uncovering |
| CN202693549U (en) * | 2012-07-03 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Plane-type coal gas filling device applicable to model test |
Non-Patent Citations (1)
| Title |
|---|
| 许江等: "煤与瓦斯突出模拟试验台的改进及应用", 《岩石力学与工程学报》 * |
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