CN103076198B - Coal and gas power phenomenon analog simulation experimental device - Google Patents
Coal and gas power phenomenon analog simulation experimental device Download PDFInfo
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- CN103076198B CN103076198B CN201310013722.6A CN201310013722A CN103076198B CN 103076198 B CN103076198 B CN 103076198B CN 201310013722 A CN201310013722 A CN 201310013722A CN 103076198 B CN103076198 B CN 103076198B
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Abstract
The invention belongs to coal mining experimental facilities, in particular to a kind of coal and gas power phenomenon analog simulation experimental device, sealing cabin (1) is welded and fixed in base for supporting (2) top, main cabin (1-2) is formed in sealing cabin (1), flexible load chamber (1-1) is provided with in the top of main cabin (1-2), several hydraulic jack (7) is installed side by side in the bottom surface of main cabin (1-2), several soil pressure cell (15) is implanted in main cabin (1-2) inner model, each soil pressure cell (15) connects Dynamic Data Acquiring instrument (14), fixed front panel (3) before sealing cabin (1), periphery stiffener (19) is provided with at sealing cabin (1), vertically two intensity buttress braces (18) are equidistantly established before sealing cabin (1), fluid injection eight is led to valve (10) and is connected manual pressure test pump (9), three parallel gas injections eight are established to lead to valve (11) at sealing cabin (1), realize the coal and gas power phenomenon under different gas pressure in experimental provision, in recovery process, the STRESS VARIATION data of cover stress field and overlying strata permeability variation data are measured.
Description
Technical field
The invention belongs to coal mining experimental facilities, particularly a kind of coal and gas power phenomenon analog simulation experimental device.
Background technology
Due to seam mining, cause Coal-body Structure to change, produce a large amount of crack.In fissure zone, form Gas Flow passage, the permeability of original coal and rock changes along with Seam Mining effect, coal-seam gas gas penetration potential enlarges markedly, affect the gathering of gas and the distribution of gas pressure, and the pore pressure that gas migration produces can cause coal petrography stress field to change, from and cause coal and rock to be out of shape and the growth in crack.In the fissure zone formed by mining influence, avoid because of gas accumulation, cause Gas Disaster, need to carry out extraction to gas.In order to effectively carry out gas pumping, need the migration rule studying gas pressure relief, thus a large amount of experimental datas to be had to produce crack after gas percolation flow velocity Changing Pattern and seepage field distribution feature to study the coal seam overlying strata characteristics of motion, crack Evolution and top covering rockmass in mining active process, determine scientific and reasonable gas pumping and study the collaborative exploitation of coal and non-coal theoretical.
Similarity simulation experiment becomes a kind of important means of coal field reaction practical site problems gradually, research coal seam recovery process superincumbent stratum moves and crack Evolution often adopts areal model, the superincumbent stratum related under gas effect move and the similar material simulation of crack Evolution fewer.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, provide one can control seam mining position, height and exploitation rate, simulated experiment coal and gas power phenomenon analog simulation experimental device accurately and reliably.
The technical scheme that technical solution problem of the present invention adopts is: coal and gas power phenomenon analog simulation experimental device comprises base for supporting, sealing cabin, sealing upper cover, gas cylinder, manual pressure test pump, valve is led in gas injection eight, valve is led in fluid injection eight, Dynamic Data Acquiring instrument, be characterized in being welded and fixed sealing cabin above base for supporting, main cabin is formed in sealing cabin, be provided with above main cabin and form flexible load chamber by high-pressure gasbag, injecting hole is provided with in the side of flexible load chamber, injecting hole is connected with gas cylinder by pipeline two, above sealing cabin, sealing upper cover is fixedly housed, several hydraulic jack is installed side by side in the bottom surface in main cabin, channel-section steel is equipped with on each hydraulic jack, several soil pressure cell is inserted in the model laid in main cabin, each soil pressure cell all passes through insulated conductor, line ball screw on insulated conductor post, nut is connected Dynamic Data Acquiring instrument with conduction screw, insulated conductor post is fixed on T-shaped disk, T-shaped disk is threaded by ring-like lid of turning round, on the boss cylinder iron hoop of sealing cabin, seal with sealing strip two between cylinder iron hoop and T-shaped disk, uniform several hole on T-shaped disk, dress conduction screw in hole, the outer end of conduction screw is provided with threaded hole has the line ball screw of pad to be connected with cover, conduction screw two ends are overlapped respectively and are had nut and O-ring seal, fixed front panel before sealing cabin, periphery stiffener is provided with in the surrounding of sealing cabin, front panel is provided with several holes, needle-like valve is all installed in each hole, vertically two intensity buttress braces are equidistantly established before sealing cabin, two parallel fluid injections eight are established to lead to valve in the below below of sealing cabin, fluid injection eight is led to valve pipeline one and is connected manual pressure test pump, three parallel gas injections eight are established to lead to valve at the middle part below of sealing cabin.
The invention has the beneficial effects as follows: coal and gas power phenomenon analog simulation experimental device can realize the automatic exploitation of similarity simulation experiment coal rock layer, make the position of seam mining in model, mining height and exploitation rate controlled, flexible loading method loads model superincumbent stratum, to ensure the time performance of simulated conditions drag by load effect, realize the coal and gas power phenomenon under different gas pressure, in recovery process, dynamic observation that is equal with overlying strata mining-induced stress under gas effect and crack evolvement process is measured to the STRESS VARIATION of overlying strata and the dynamic change of overlying strata permeability, for coal and gas power phenomenon provides reliable foundation.
Accompanying drawing explanation
Illustrate with embodiment below in conjunction with accompanying drawing.
Fig. 1 is coal and gas power phenomenon analog simulation experimental device structural front view.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the rear view of Fig. 1.
Fig. 4 is the left view of Fig. 1.
Fig. 5 is the A-A cut-open view of Fig. 4.
In figure, 1-sealing cabin; The flexible load chamber of 1-1-; The main cabin of 1-2-; 2-base for supporting; 3-front panel; 4-seals upper cover; 5-injecting hole; 6-sealing strip one; 7-hydraulic jack; 8-channel-section steel; 9-manual pressure test pump; 9-1-pipeline one; Valve is led in 10-fluid injection eight; Valve is led in 11-gas injection eight; 12-high-pressure gasbag; 13-gas cylinder; 13-1-pipeline two; 14-Dynamic Data Acquiring instrument; 15-soil pressure cell; 15-1-insulated conductor; 16-annular turns round lid; 16-1-line ball screw; 16-2-T type disk; 16-3-sealing strip two; 16-4-cylinder iron hoop; 16-5-conducts screw; 16-6-nut; 16-7-O-ring seal; 16-8-pad; 17-needle-like valve; 18-intensity buttress brace; 19-periphery stiffener.
Embodiment
Embodiment, with reference to accompanying drawing 1 ~ 5, coal and gas power phenomenon analog simulation experimental device on base for supporting 2, is welded and fixed sealing cabin 1 and seals with sealing strip 1, the main cabin 1-2 of sealing is formed in sealing cabin 1, on main cabin 1-2, establish a high-pressure gasbag 12 to form flexible load chamber 1-1, for simulating the loading of cover stress, main cabin 1-2 is used for the installation of the filling of analog material under air-proof condition, the installation of coal rock layer automatic exploitation system and cover stress Analytical system.Fixing seal upper cover 4 above flexible load chamber 1-1 and sealing cabin 1, is provided with eight hydraulic jacks 7 arranged side by side at main cabin 1-2 inner bottom surface, on each hydraulic jack 7, is equipped with channel-section steel 8.Some soil pressure cells 15 are implanted in the 1-2 inner model of main cabin, each soil pressure cell 15 all connects the conduction screw 16-5 in the T-shaped disk 16-2 of insulated conductor post with insulated conductor 15-1, and seal with nut 16-6 and O-ring seal 16-7, insulated conductor 15-1 is connected with Dynamic Data Acquiring instrument 14 by the line ball screw 16-1 of the conduction screw 16-5 outer end on insulated conductor post again.The T-shaped disk 16-2 of insulated conductor post is installed on insulated conductor post cylinder iron hoop 16-4, and turns round lid 16 by annular and to be threaded with cylinder iron hoop 16-4 and to be fixed, and seals at cylinder iron hoop 16-4 and T-shaped disk 16-2 junction sealing strip two 16-3.T-shaped disk 16-2 is provided with 20 conduction screw 16-5, and the outer end of conduction screw 16-5 is provided with threaded hole, has the line ball screw 16-1 of pad 16-8 to be connected with cover.The inside of conduction screw 16-5 crimps insulated conductor 15-1 with nut 16-6.The front panel 3 that fixing acrylic material is made before sealing cabin 1, is provided with periphery stiffener 19 in the surrounding of sealing cabin 1.Front panel 3 is provided with three rows seven and arranges totally two ten one stainless needle-like valves 17, be provided with gas injection eight in the below below of sealing cabin 1 and lead to valve 11 and form measuring gas flow rate system.One of them side above sealing cabin 1 is provided with injecting hole 5, and injecting hole 5 pipeline two 13-1 connects gas cylinder 13.Establish two fluid injections eight to lead to valve 10 in the parallel beneath below of sealing cabin 1, fluid injection eight is led to valve 10 pipeline one 9-1 and is connected manual pressure test pump 9.Before sealing cabin 1, be fixed with two equidistant vertically parallel intensity buttress braces 18, fix periphery stiffener 19 in the surrounding of sealing cabin 1, to increase the intensity of device.
The course of work of coal and gas power phenomenon analog simulation experimental device is:
First: the preliminary work of experiment carried out, eight two-way release micro hydraulic oil cylinders 7 that add are raised up to precalculated position, front panel 3, intensity buttress brace 18 and periphery stiffener 19 are installed.
Then analog material being carried out proportioning inserts in analog simulation experimental device, imbeds soil pressure cell 15 in precalculated position, puts into high-pressure gasbag 12, and close sealing upper cover 4.
Connect experimental facilities, the impermeability of inspection apparatus operation and experimental provision, open Dynamic Data Acquiring instrument 14 and record data, meanwhile, superincumbent stratum loading system and high-pressure gasbag 12 Slow loading are to preset pressure.
Lead to valve 11 to gas injection in experimental provision by three gas injections eight, make gaseous tension keep stable, then decline first hydraulic jack 7, and repeat previous step, and measure overlying strata seepage discharge under mining influence.
Finally the data of all collections are processed, reach a conclusion.
Claims (1)
1. a coal and gas power phenomenon analog simulation experimental device, comprise base for supporting (2), sealing cabin (1), sealing upper cover (4), gas cylinder (13), manual pressure test pump (9), valve (11) is led in gas injection eight, valve (10) is led in fluid injection eight, Dynamic Data Acquiring instrument (14), it is characterized in that being welded and fixed sealing cabin (1) in base for supporting (2) top, main cabin (1-2) is formed in sealing cabin (1), be provided with high-pressure gasbag (12) in the top of main cabin (1-2) and form flexible load chamber (1-1), injecting hole (5) is provided with in the side of flexible load chamber (1-1), injecting hole (5) is connected with gas cylinder (13) by pipeline two (13-1), in the top of flexible load chamber (1-1) and sealing cabin (1), sealing upper cover (4) is fixedly housed, several hydraulic jack (7) is installed side by side in the bottom surface of main cabin (1-2), channel-section steel (8) is equipped with on each hydraulic jack (7), several soil pressure cell (15) is implanted in main cabin (1-2) inner model, each soil pressure cell (15) all connects the conduction screw (16-5) in the T-shaped disk (16-2) of insulated conductor post with insulated conductor (15-1), and seal with nut (16-6) and O-ring seal (16-7), line ball screw (16-1) on insulated conductor post, nut (16-6) is connected Dynamic Data Acquiring instrument (14) with conduction screw (16-5), the T-shaped disk (16-2) of insulated conductor post is installed on insulated conductor post iron hoop (16-4), and turn round lid (16) and cylinder iron hoop (16-4) screw thread by annular and be fixed, seal with sealing strip two (16-3) between cylinder iron hoop (16-4) and T-shaped disk (16-2), in the upper uniform several hole of T-shaped disk (16-2), dress conduction screw (16-5) in hole, the outer end of conduction screw (16-5) is provided with threaded hole has the line ball screw (16-1) of pad (16-8) to be connected with cover, conduction screw (16-5) two ends are overlapped respectively and are had nut (16-6) and O-ring seal (16-7), the inside nut (16-6) of conduction screw (16-5) crimps insulated conductor (15-1), fixed front panel (3) before sealing cabin (1), periphery stiffener (19) is provided with in the surrounding of sealing cabin (1), front panel (3) is provided with several holes, needle-like valve (17) is all installed in each hole, vertically two intensity buttress braces (18) are equidistantly established before sealing cabin (1), two parallel fluid injections eight are established to lead to valve (10) in the below below of sealing cabin (1), fluid injection eight is led to valve (10) pipeline one (9-1) and is connected manual pressure test pump (9), three parallel gas injections eight are established to lead to valve (11) at the middle part below of sealing cabin (1).
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| CN201310013722.6A CN103076198B (en) | 2013-01-15 | 2013-01-15 | Coal and gas power phenomenon analog simulation experimental device |
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Families Citing this family (10)
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| CN104535740B (en) * | 2014-12-30 | 2016-04-13 | 华北科技学院 | A kind of determination of coal seam gas pressure analog simulation experimental device and method |
| CN106053755B (en) * | 2016-05-08 | 2018-09-28 | 西安科技大学 | A kind of coal and gas power phenomenon three-dimensional physical simulation comprehensive experimental system |
| CN106124380B (en) * | 2016-06-22 | 2019-01-15 | 太原理工大学 | The device and method of coal column gas permeability is measured in a kind of similarity simulation experiment |
| CN105974084B (en) * | 2016-07-11 | 2018-08-17 | 中国矿业大学(北京) | A kind of coal bed gas extraction experimental simulation device |
| CN106405045A (en) * | 2016-11-04 | 2017-02-15 | 山东科技大学 | Deep seam strip mining and filling simulation test system and method |
| CN106640043B (en) * | 2017-02-08 | 2023-07-11 | 中国地质大学（武汉） | Coal seam disturbance pulverized coal motion state simulation device |
| CN108918249B (en) * | 2018-08-20 | 2020-07-10 | 山东科技大学 | Coal body deformation test method under coal seam water injection wetting influence mining action |
| CN109725356B (en) * | 2018-12-29 | 2020-09-25 | 中国地质调查局油气资源调查中心 | Natural gas hydrate development simulation experiment device |
| CN111502754A (en) * | 2020-06-02 | 2020-08-07 | 西山煤电(集团)有限责任公司钻探分公司 | Simulation test device for coal face gas migration enrichment zone |
| CN112504936B (en) * | 2020-11-30 | 2021-12-03 | 中国地质大学（北京） | Testing device and testing method for simulating and researching permeability of deep coal bed methane |
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