CN103076198A - Analog simulation experiment device for coal and gas simultaneous extraction - Google Patents
Analog simulation experiment device for coal and gas simultaneous extraction Download PDFInfo
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- CN103076198A CN103076198A CN2013100137226A CN201310013722A CN103076198A CN 103076198 A CN103076198 A CN 103076198A CN 2013100137226 A CN2013100137226 A CN 2013100137226A CN 201310013722 A CN201310013722 A CN 201310013722A CN 103076198 A CN103076198 A CN 103076198A
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Abstract
The invention belongs to coal mining experimental facilities and in particularly relates to an analog simulation experiment device for coal and gas simultaneous extraction. A sealing cabin body (1) is fixed above a support base in a welding manner, a main cabin (1-2) is formed in the sealing cabin body (1), a flexible loading cabin (1-1) is arranged above the main cabin (1-2), a plurality of hydrocylinders (7) are arranged on the bottom surface of the main cabin (1-2) in parallel, a plurality of earth pressure cells (15) are implanted in a model in the main cabin (1-2), each earth pressure cell (15) is connected with a dynamic data acquisition instrument (14), a front panel (3) is fixed in front of the sealing cabin body (1), peripheral reinforcing bars (19) are arranged on the sealing cabin body (1), two strength reinforcing beams (18) are arranged in front of the sealing cabin body (1) at an equal interval, a liquid-injecting eight-way valve (10) is connected with a hand-operating pressure test pump (9), three gas-injecting eight-way valves (11) are arranged on the sealing cabin body (1) in parallel, and therefore coal and gas simultaneous extraction under different gas pressures can be achieved by using the experiment device. The analog simulation experiment device disclosed by the invention is used for measuring stress change data and overlying strata permeability change data of an overlying strata stress field in the exploitation process.
Description
Technical field
The invention belongs to the coal mining experimental facilities, particularly a kind of coal and gas are adopted the analog simulation experimental provision altogether.
Background technology
Because seam mining causes Coal-body Structure to change, and produces a large amount of cracks.In fissure zone, form the Gas Flow passage, the permeability of original coal and rock is along with the Seam Mining effect changes, the 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 that the coal petrography stress field changes, from and cause the growth in coal and rock distortion and crack.In the fissure zone that formed by mining influence, avoid this gathering of invar, cause Gas Disaster, need to carry out extraction to gas.In order effectively to carry out gas pumping, the migration rule that needs the research gas pressure relief, thereby to have a large amount of experimental datas to study the overlying strata characteristics of motion in coal seam in the mining active process, crack Evolution and upper overlying strata body generation crack after gas percolation flow velocity Changing Pattern and seepage field distribution feature, determine that the collaborative exploitation of scientific and reasonable gas pumping and Study on Coal and gas is theoretical.
The analog 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 the crack Evolution often adopts areal model, relates to that superincumbent stratum under the gas effect moves and the similar material simulation of crack Evolution is fewer.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, provide a kind of and control seam mining position, height and exploitation rate, simulated experiment coal and gas are adopted the analog simulation experimental provision altogether accurately and reliably.
The technical scheme that technical solution problem of the present invention adopts is: coal and gas are adopted altogether the analog simulation experimental provision and are comprised base for supporting, sealing cabin, the sealing loam cake, gas cylinder, manual pressure test pump, gas injection eight logical valves, fluid injection eight logical valves, the Dynamic Data Acquiring instrument, be characterized in above base for supporting, being welded and fixed sealing cabin, form main cabin in the sealing cabin, above main cabin, be provided with by high-pressure gasbag and form flexible load chamber, side in flexible load chamber is provided with injecting hole, injecting hole is connected with gas cylinder by pipeline two, the sealing loam cake fixedly is housed above sealing cabin, several hydraulic jacks are installed on the bottom surface in main cabin side by side, be equipped with channel-section steel above the hydraulic jack at each, insert several soil pressure cells in the model of in main cabin, laying, each soil pressure cell all passes through insulated conductor, line ball screw on the insulated conductor post, nut be connected screw and connect the Dynamic Data Acquiring instrument, the insulated conductor post is fixed on the T-shaped disk, T-shaped disk is threaded by the 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 the T-shaped disk, uniform several holes on T-shaped disk, dress conduction screw in the 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 nut and O-ring seal are arranged, at the front of sealing cabin fixed front panel, around sealing cabin, be provided with peripheral stiffener, plate is provided with several holes in front, the needle valve door is all installed in each hole, two intensity buttress braces are vertically equidistantly established in front at sealing cabin, below the back of sealing cabin, establish two parallel fluid injections, eight logical valves, fluid injection eight logical valves connect manual pressure test pump with pipeline one, establish three parallel gas injections, eight logical valves at the middle part, back of sealing cabin.
The invention has the beneficial effects as follows: coal and gas are adopted the automatic exploitation that the analog simulation experimental provision can be realized analog simulation experiment coal rock layer altogether, make the position of seam mining in the model, mining height and exploitation rate are controlled, flexible loading method loads the model superincumbent stratum, to guarantee that the simulated conditions drag is subjected to the time performance of load, realize that coal and gas under the different gas pressures adopts altogether, in recovery process to the STRESS VARIATION of overlying strata and the dynamic change of overlying strata permeability measure with overlying strata mining-induced stress under the gas effect all with the dynamic observation of field, crack evolutionary process, adopting altogether for coal and gas provides reliable foundation.
Description of drawings
Specify with embodiment below in conjunction with accompanying drawing.
Fig. 1 is that coal and gas are adopted analog simulation experimental provision structural front view altogether.
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.
Among the figure, the 1-sealing cabin; The flexible load chamber of 1-1-; 1-2-master cabin; The 2-base for supporting; The 3-front panel; 4-seals loam cake; The 5-injecting hole; 6-sealing strip one; The 7-hydraulic jack; The 8-channel-section steel; The 9-manual pressure test pump; 9-1-pipeline one; 10-fluid injection eight logical valves; 11-gas injection eight logical valves; The 12-high-pressure gasbag; The 13-gas cylinder; 13-1-pipeline two; 14-Dynamic Data Acquiring instrument; The 15-soil pressure cell; The 15-1-insulated conductor; 16-insulated conductor band of column shape is turned 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; The 16-6-nut; The 16-7-O-ring seal; The 16-8-pad; 17-needle valve door; 18-intensity buttress brace; 19-periphery stiffener.
Embodiment
Embodiment, with reference to accompanying drawing 1 ~ 5, coal and gas are adopted altogether the analog simulation experimental provision and are welded and fixed sealing cabin 1 and use sealing strip one 6 sealings on base for supporting 2, the main cabin 1-2 of sealing cabin 1 interior formation sealing, on main cabin 1-2, establish a high-pressure gasbag 12 and form flexible load chamber 1-1, be used for the loading of simulation cover stress, main cabin 1-2 is used for the filling of analog material under air-proof condition, the installation of coal rock layer automatic exploitation system and the installation that cover stress is measured system.Fixing seal loam cake 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, is equipped with channel-section steel 8 above the hydraulic jack 7 at each.In the 1-2 inner model of main cabin, implant some soil pressure cells 15, each soil pressure cell 15 all connects the interior conduction screw 16-5 of T shape disk 16-2 of insulated conductor post with insulated conductor 15-1, and with nut 16-6 and O-ring seal 16-7 sealing, 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 the insulated conductor post again.The T-shaped disk 16-2 of insulated conductor post is installed on the insulated conductor post cylinder iron hoop 16-4, and turns round with annular and to cover 16 and be threaded with cylinder iron hoop 16-4 and be fixed, in cylinder iron hoop 16-4 and T-shaped disk 16-2 junction with sealing strip two 16-3 sealing.Be provided with 20 conduction screw 16-5 at T-shaped disk 16-2, 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 nut 16-6 crimping insulated conductor 15-1.At the fixing front panel 3 made from acrylic material in the front of sealing cabin 1, around sealing cabin 1, be provided with peripheral stiffener 19.Plate 3 is provided with three rows, seven row totally two ten one stainless needle valve doors 17 in front, is provided with gas injection eight logical valves 11 and forms the measuring gas flow rate system below the back of sealing cabin 1.One of them side above sealing cabin 1 is provided with injecting hole 5, and injecting hole 5 usefulness pipelines two 13-1 connect gas cylinder 13.Establish two fluid injections, eight logical valves 10 in the back of sealing cabin 1 parallel beneath, fluid injection eight logical valve 10 usefulness pipelines one 9-1 connect manual pressure test pump 9.Be fixed with equidistant vertical two parallel intensity buttress braces 18 in the front of sealing cabin 1, fixing peripheral stiffener 19 around sealing cabin 1 is to increase the intensity of device.
The course of work that coal and gas are adopted the analog simulation experimental provision altogether is:
At first: the preliminary work of experiment is carried out, eight two-way release micro hydraulic oil cylinders 7 that add are raised up to the precalculated position, front panel 3, intensity buttress brace 18 and peripheral stiffener 19 are installed.
Then analog material is carried out proportioning and insert in the analog simulation experimental provision, imbed soil pressure cell 15 in the precalculated position, put into high-pressure gasbag 12, sealing loam cake 4 closes.
Connect experimental facilities, the impermeability of inspection apparatus operation and experimental provision is opened Dynamic Data Acquiring instrument 14 record data, and simultaneously, the superincumbent stratum loading system is that high-pressure gasbag 12 Slow loadings are to preset pressure.
By the gas injection in the experimental provision of the logical valves 11 of three gas injections eight, make gaseous tension keep stable, first hydraulic jack 7 that then descends, and repeat previous step, and overlying strata seepage discharge under the mining influence is measured.
At last the data of all collections are processed, reached a conclusion.
Claims (1)
1. a coal and gas are adopted the analog simulation experimental provision altogether, comprise base for supporting (2), sealing cabin (1), sealing loam cake (4), gas cylinder (13), manual pressure test pump (9), gas injection eight logical valves (11), fluid injection eight logical valves (10), Dynamic Data Acquiring instrument (14), it is characterized in that being welded and fixed sealing cabin (1) in base for supporting (2) top, form main cabin (1-2) in the 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), be provided with injecting hole (5) in the side of flexible load chamber (1-1), injecting hole (5) is connected with gas cylinder (13) by pipeline two (13-1), sealing loam cake (4) fixedly is housed in the top of sealing cabin (1), several hydraulic jacks (7) are installed on the bottom surface of main cabin (1-2) side by side, on each hydraulic jack (7), be equipped with channel-section steel (8), in the inner model of main cabin (1-2), implant several soil pressure cells (15), each soil pressure cell (15) is all by insulated conductor (15-1), line ball screw (16-1) on the insulated conductor post, nut (16-6) be connected screw (16-5) and connect Dynamic Data Acquiring instrument (14), the insulated conductor post is fixed on the T-shaped disk (16-2), T-shaped disk (16-2) is threaded by the ring-like lid (16) of turning round, on the boss cylinder iron hoop (16-4) of sealing cabin (1), seal with sealing strip two (16-3) between cylinder iron hoop (16-4) and the T-shaped disk (16-2), in upper uniform several holes of T-shaped disk (16-2), dress conduction screw (16-5) in the 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 nut (16-6) and O-ring seal (16-7) are arranged, front fixed front panel (3) at sealing cabin (1), around sealing cabin (1), be provided with peripheral stiffener (19), plate (3) is provided with several holes in front, needle valve door (17) is all installed in each hole, two intensity buttress braces (18) are vertically equidistantly established in front at sealing cabin (1), establish two parallel fluid injections, eight logical valves (10) in the below, back of sealing cabin (1), fluid injection eight logical valves (10) connect manual pressure test pump (9) with pipeline one (9-1), establish three parallel gas injections, eight logical valves (11) at the middle part, back 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535740A (en) * | 2014-12-30 | 2015-04-22 | 华北科技学院 | Analog simulation experimental device and method for coalbed gas pressure measurement |
| CN105974084A (en) * | 2016-07-11 | 2016-09-28 | 中国矿业大学(北京) | In-coal-seam gas extraction experiment simulation device |
| CN106053755A (en) * | 2016-05-08 | 2016-10-26 | 西安科技大学 | Coal and gas co-mining three-dimensional physical simulation comprehensive experiment system |
| CN106124380A (en) * | 2016-06-22 | 2016-11-16 | 太原理工大学 | A kind of similarity simulation experiment is measured the device and method of coal column breathability |
| 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 |
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN108918249A (en) * | 2018-08-20 | 2018-11-30 | 山东科技大学 | Coal-bed flooding wetting, which influences to adopt, acts lower coal deformation test method |
| CN109725356A (en) * | 2018-12-29 | 2019-05-07 | 中国地质调查局油气资源调查中心 | A kind of gas hydrates exploitation imitative experimental appliance |
| 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 |
| CN112504936A (en) * | 2020-11-30 | 2021-03-16 | 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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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535740A (en) * | 2014-12-30 | 2015-04-22 | 华北科技学院 | Analog simulation experimental device and method for coalbed gas pressure measurement |
| 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 |
| CN106053755A (en) * | 2016-05-08 | 2016-10-26 | 西安科技大学 | Coal and gas co-mining three-dimensional physical simulation comprehensive experiment system |
| CN106124380A (en) * | 2016-06-22 | 2016-11-16 | 太原理工大学 | A kind of similarity simulation experiment is measured the device and method of coal column breathability |
| 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 |
| CN105974084A (en) * | 2016-07-11 | 2016-09-28 | 中国矿业大学(北京) | In-coal-seam gas extraction experiment 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 |
| CN106640043A (en) * | 2017-02-08 | 2017-05-10 | 中国地质大学（武汉） | Simulation device for movement state of coal powder under coal seam disturbance |
| CN108918249A (en) * | 2018-08-20 | 2018-11-30 | 山东科技大学 | Coal-bed flooding wetting, which influences to adopt, acts lower coal deformation test method |
| 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 |
| CN109725356A (en) * | 2018-12-29 | 2019-05-07 | 中国地质调查局油气资源调查中心 | A kind of gas hydrates exploitation imitative experimental appliance |
| 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 |
| CN112504936A (en) * | 2020-11-30 | 2021-03-16 | 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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