CN201170783Y - Simulation pressure-testing case for rock formation stress - Google Patents

Simulation pressure-testing case for rock formation stress Download PDF

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Publication number
CN201170783Y
CN201170783Y CNU2008200975196U CN200820097519U CN201170783Y CN 201170783 Y CN201170783 Y CN 201170783Y CN U2008200975196 U CNU2008200975196 U CN U2008200975196U CN 200820097519 U CN200820097519 U CN 200820097519U CN 201170783 Y CN201170783 Y CN 201170783Y
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China
Prior art keywords
box
case
plate
coal
simulation pressure
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Expired - Fee Related
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CNU2008200975196U
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Chinese (zh)
Inventor
尹光志
许江
鲜学福
魏作安
王维忠
陶云奇
赵洪宝
王登科
李树春
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Chongqing University
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Chongqing University
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Abstract

The utility model discloses a terrane stress simulation pressure test box, which is primarily provided with a case body. The case body is hexahedral. The terrane stress simulation pressure test case is characterized in that the front erect plate, the back erect plate, the left erect plate and the right erect plate of the case body are erect surfaces; the upper plate and the lower plate of the case body are cant plates at an angle of Alpha from the level; the upper plate of the case body is provided with a opening, and is provided with a mobile press plate; the mobile press plate glides up and down along the opening of the upper plate; the right erect plate of the case body is provided with an outburst opening; the outburst opening is provided with a sliding door; when the sliding door is closed, the sliding door seals up the outburst opening. The terrane stress simulation pressure test box has the remarkable effects that the terrane stress simulation pressure test box can simulate various horizontal tilts of actual gas and coal seam, in particular in inclined coal seam simulation tests in case of outburst for exposing coal seam in roof and floor crosscut. In addition, the inner chamber of the case body can be inflated through faces, and the gas pressure in the actual coal seam can be simulated.

Description

Terrane stress simulation pressure testing box
Technical field
The utility model relates to a kind of test unit of simulating terrane stress, specifically, be a kind of in coal and gas burst experiment the terrane stress simulation pressure testing box of multi-angle simulation terrane stress.
Background technology
Aspect coal and the gas outburst mechanism research by numerous scholars generally accepted be the combined action hypothesis, it think coal and gas outstanding be result by the mechanical property combined action of stress, gas pressure and coal, but up to the present, the mechanism of action of the mechanical property of terrestrial stress, gas pressure and coal in outstanding process is not clear and definite as yet yet.USSR (Union of Soviet Socialist Republics) has just been carried out the outstanding simulated experiment of one dimension in the 1950's, 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.Early 1960s, Japanese Xue Zheshi is flat increase carry out gas impelling coal particle test in the laboratory, utilize CO 2Crystal ice, rosin, cement, coal grain to have made porous media model 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 Soviet Union at last.Compare with the outstanding simulation test of the Soviet Union, the advantage of Japanese analogue means is to have in the model cement section of one section simulation country rock, can carry out operations such as " drivings "; Its shortcoming is to make model with the material of these no gas adsorptive poweies such as ice, cement or rosin, no matter its physico-chemical property or mechanical property all differ greatly with coal.Can not real at last simulation, can only can be regarded as is " duplicating ".
At home, early 1980s, professor Wang Youan of Fushun branch of coal in China research institute has at first carried out coal and the outstanding one dimension simulation test research of gas, the collection in worksite coal sample, the laboratory moulding, Simulation with I V, V class outburst danger coal have 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 outstanding experimental provision of gas that terrestrial stress can change gas pressure again.The Guo Li of China Mining University in 2000 is steady, Yu Qixiang, Jiang Chenglin give prominence to device by coal and gas and studied 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, temperature reduces then because methane gas desorb and expansion cause, and its variation is to raise earlier afterwards to reduce and continually varying.The Niu Guoqing of Jiaozuo Institute of Technology in 2002, 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.Cai of Jiaozuo Institute of Technology in 2004 successfully waits and has designed three-dimensional coal and the outstanding analogue experiment installation of gas according to similarity theory, experimental simulation coal under different coal type intensity, three-dimensional stress, the gas pressure condition and the outstanding process of gas, the same gas pressure of intensity of outburst, coal type intensity, three-dimensional stress, gas pressure relation mathematic model have been drawn, think that the mechanical property of stress and coal is the principal element of decision intensity of outburst.Cai Chenggong etc. improve on original experimental provision, have designed three-dimensional coal and the outstanding analogue experiment installation of gas by similarity theory again.The length that this experimental provision is used for simulating outstanding coal sample moulded dimension is 225mm * 225mm * 137mm.The stress application system is a TYS-500 type rock stress testing machine.The Z-axis straightening connects by the testing machine axial system and applies.Lateral stress is a confined pressure, applies with special-purpose side hydraulic oil cylinder, and hydraulic oil is by testing machine side pressure system feed flow.When outstanding simulation, measure applied pressure jointly with standard precision pressure gauge and testing machine metering system.After the coal sample moulding, continuous degassing 48h is then more than the inflation absorption 48h.When stress, gas pressure no change, when promptly device does not have gas leakage, unloading, adopt mechanical system to throw open aspis, make it that outstanding experiment of finishing take place.For safety, inflation medium adopts CO 2
Existing coal and gas are given prominence to experimental provision, though deepened the progress of coal and gas outburst mechanism to a certain extent, but its common shortcoming that exists is: the model of several experimental provisions all is levels, and reality, the down-hole is that the coal seam of level inclination is less relatively, the coal seam that run into of the outstanding situation of simulated field actual coal containing methane gas layer, especially roof and floor stone door punching coal all tilts fully, and existing apparatus can't be simulated.
The utility model content
The purpose of this utility model provides a kind of terrane stress simulation pressure testing box, and situation, especially the roof and floor stone door punching coal that can simulate the various horizontal tilts of on-the-spot actual gassy seam are given prominence to the inclined seam simulation test that situation is run into.
For achieving the above object, the utility model has been described a kind of terrane stress simulation pressure testing box, mainly be provided with box body, this box body is a hexahedron, its key is: the front, rear, left and right riser of described box body is a vertical surface, upper and lower base plate is a skewback, and this skewback and horizontal sextant angle are α, and the scope of described angle α is 0~45 °;
The upper plate opening of described box body, and cooperate movable pressing board is installed, this movable pressing board slides up and down along described upper plate opening;
Have aspis on the right riser of described box body, this aspis place is provided with slide, and when slide cut out, this slide sealed up described aspis.
Slide is controlled by cylinder, can realize opening fast of aspis, is convenient to coal and gas burst experiment.
The upper plate opening of described box body and the faying face of movable pressing board are provided with rubber seal.
Upper surface at described box body lower shoe has groove, and this groove has air admission hole and communicates with the external world, and metal foam is installed in the described groove, the netted capillary through holes that is distributed with in the described metal foam, and capillary through holes makes described air admission hole communicate with box body inner chamber air;
Utilize the capillary through holes of net distribution in the metal foam, the gases at high pressure that air admission hole is sent into are inflated to the box body inner chamber in the mode of " face inflation ", more can simulate gas air pressure in the actual coal seam.
Described movable pressing board has venthole and communicates with the external world.
The lower surface of described movable pressing board has groove, and described venthole is positioned at this groove, in this groove filtrator is installed, and the capillary through holes in this filtrator makes described venthole communicate with box body inner chamber air.
Venthole is sent the high pressure gas in the box body, and filtrator guarantees that other materials in the box body can not blown out box body by air-flow.
Quick gas joint all is installed in described air admission hole and the venthole.
The front vertical plate opening of described box body, and bolt has front end end cover, described front end end cover seals up the front vertical plate opening of this box body.
Remarkable result of the present utility model is: a kind of terrane stress simulation pressure testing box is provided, can simulate the situation of the various horizontal tilts of on-the-spot actual gassy seam, especially the roof and floor stone door punching coal is given prominence to the inclined seam simulation test that situation is run into, simultaneously, can also inflate to the box body inner chamber in the mode of " face inflation ", simulate gas air pressure in the actual coal seam.
Description of drawings
Fig. 1 is the structural representation of box body;
Fig. 2 is the structural representation of slide and aspis;
Fig. 3 is the structural representation of air admission hole and venthole,
Fig. 4 is a user mode synoptic diagram of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figure 1, 2: a kind of terrane stress simulation pressure testing box, mainly be provided with box body 1, this box body 1 is a hexahedron, the front, rear, left and right riser of described box body 1 is a vertical surface, upper and lower base plate is a skewback, and this skewback and horizontal sextant angle are α, and the scope of described angle α is 0~45 °;
Angle α can get 6 °, 15 °, 30 °, 45 °, makes the box body 1 of different angle, to satisfy the simulation needs of different gradient lithospheres.
The upper plate opening of described box body 1, and cooperate movable pressing board 2 is installed, this movable pressing board 2 slides up and down along described upper plate opening;
Have aspis c on the right riser of described box body 1, this aspis c place is provided with slide 4, and when slide 4 cut out, this slide 4 sealed up described aspis c.
Slide 4 can be realized opening fast of aspis c by cylinder control, is convenient to coal and gas burst experiment.
The upper plate opening of described box body 1 and the faying face of movable pressing board 2 are provided with rubber seal 7.
As shown in Figure 3: the upper surface at described box body 1 lower shoe has groove, this groove has air admission hole 1a and communicates with the external world, metal foam 5 is installed in the described groove, the netted capillary through holes that is distributed with in the described metal foam 5, capillary through holes makes described air admission hole 1a communicate with box body 1 inner chamber air;
Utilize the capillary through holes of net distribution in the metal foam 5, the gases at high pressure that air admission hole 1a sends into are inflated to box body 1 inner chamber in the mode of " face inflation ", more can simulate gas air pressure in the actual coal seam.
Described movable pressing board 2 has venthole 2a and communicates with the external world.
The lower surface of described movable pressing board 2 has groove, and described venthole 2a is positioned at this groove, in this groove filtrator 5 ' is installed, and the capillary through holes in this filtrator 5 ' makes described venthole 2a communicate with box body 1 inner chamber air.
Venthole 2a sends the high pressure gas in the box body 1, and filtrator 5 ' guarantees that other materials in the box body 1 can not blown out box body 1 by air-flow.Filtrator 5 ' can adopt metal foam 5.
Metal foam 5 can transmit airflow, has and has very high hardness, can sustain high pressure and indeformable, guarantees the accuracy of high-potting.
Quick gas joint 6 all is installed among described air admission hole 1a and the venthole 2a.Gas joint 6 is realized charging and discharging fast of gas fast.
Can be provided with 1,3 or more air admission hole 1a and venthole 2a, to adapt to the needs of box body 1 size.
The front vertical plate opening of described box body 1, and bolt has front end end cover 8, described front end end cover 8 seals up the front vertical plate opening of this box body 1.
Open front end end cover 8, can simulate texture of coal seam and fill coal dust toward box body 1.
Its principle of work is:
As shown in Figure 4: a rectangle reaction frame is set, four limit inwalls at this reaction frame all are fixed with hydraulic cylinder, wherein inwall fixing hydraulic cylinder 3 in top connects movable pressing board 2, this top hydraulic cylinder 3 promotes movable pressing board 2 and moves up and down, hydraulic cylinder following and that left side inwall is fixing is connected to the outer wall of box body 1, when slide 4 cut out aspis c, inwall fixing hydraulic cylinder in the right was connected on the slide 4, helped slide 4 to seal up described aspis c.
The faying face of described box body 1 upper surface opening and movable pressing board 2 is provided with rubber seal.
After will pulverizing with comminutor from the projecting coal bed institute in the scene coal sample of getting, will be coal powder filled go into box body 1, slide 4 closure on, restart the hydraulic cylinder that inwall is installed around the reaction frame, and box body 1 interior coal dust is pressurizeed, and simulate underground pressure.
Can also feed " gas " in the above-mentioned box body 1, after box body 1 internal pressure reaches predetermined value, stable firmly hydraulic cylinder, make in the box body 1 and keep-up pressure, unclamp the hydraulic cylinder on the right, open slide 4 rapidly by cylinder again, obtain the data of coal and gas burst experiment from aspis c.
Cylinder block can be fixedlyed connected with box body 1, to keep closely cooperating of slide 4 and aspis c, if box body 1 volume is too small, also cylinder block can be fixedlyed connected with reaction frame, promptly at the base and the web joint fixed connecting plate of cylinder body, web joint and reaction frame are fixed together, and keep closely cooperating of slide 4 and aspis c.

Claims (6)

1, a kind of terrane stress simulation pressure testing box, mainly be provided with box body (1), this box body (1) is a hexahedron, it is characterized in that: the front, rear, left and right riser of described box body (1) is a vertical surface, upper and lower base plate is a skewback, this skewback and horizontal sextant angle are α, and the scope of described angle α is 0~45 °;
The upper plate opening of described box body (1), and cooperate movable pressing board (2) is installed, this movable pressing board (2) slides up and down along described upper plate opening;
Have aspis (c) on the right riser of described box body (1), this aspis (c) locates to be provided with slide (4), and when slide (4) when closing, this slide (4) seals up described aspis (c).
2, terrane stress simulation pressure testing box according to claim 1 is characterized in that: the faying face of the upper plate opening of described box body (1) and movable pressing board (2) is provided with rubber seal (7).
3, terrane stress simulation pressure testing box according to claim 1, it is characterized in that: the upper surface at described box body (1) lower shoe has groove, this groove has air admission hole (1a) and communicates with the external world, metal foam (5) is installed in the described groove, the netted capillary through holes that is distributed with in the described metal foam (5), capillary through holes makes described air admission hole (1a) communicate with box body (1) inner chamber air;
Described movable pressing board (2) has venthole (2a) and communicates with the external world.
4, terrane stress simulation pressure testing box according to claim 3, it is characterized in that: the lower surface of described movable pressing board (2) has groove, described venthole (2a) is positioned at this groove, filtrator (5 ') is installed in this groove, and the capillary through holes in this filtrator (5 ') makes described venthole (2a) communicate with box body (1) inner chamber air.
5, according to claim 3 or 4 described terrane stress simulation pressure testing boxes, it is characterized in that: in described air admission hole (1a) and the venthole (2a) quick gas joint (6) is installed all.
6, terrane stress simulation pressure testing box according to claim 1 is characterized in that: the front vertical plate opening of described box body (1), and bolt has front end end cover (8), described front end end cover (8) seals up the front vertical plate opening of this box body (1).
CNU2008200975196U 2008-01-22 2008-01-22 Simulation pressure-testing case for rock formation stress Expired - Fee Related CN201170783Y (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102706528A (en) * 2012-05-25 2012-10-03 中国矿业大学(北京) Gas flow characteristic testing device of fragmented coal rock mass
CN102735802A (en) * 2012-07-03 2012-10-17 淮南矿业(集团)有限责任公司 Coal gas surface filling device applicable to model test
CN104596855A (en) * 2015-01-09 2015-05-06 山东科技大学 Physical similar simulation test device and physical similar simulation test method for tilted stratums

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102706528A (en) * 2012-05-25 2012-10-03 中国矿业大学(北京) Gas flow characteristic testing device of fragmented coal rock mass
CN102735802A (en) * 2012-07-03 2012-10-17 淮南矿业(集团)有限责任公司 Coal gas surface filling device applicable to model test
CN104596855A (en) * 2015-01-09 2015-05-06 山东科技大学 Physical similar simulation test device and physical similar simulation test method for tilted stratums
CN104596855B (en) * 2015-01-09 2017-03-08 山东科技大学 A kind of tilted stratum physical simulation assay device and method

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081224

Termination date: 20100222

C17 Cessation of patent right