CN205449675U - Strip coal column stability test device - Google Patents
Strip coal column stability test device Download PDFInfo
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- CN205449675U CN205449675U CN201620248918.2U CN201620248918U CN205449675U CN 205449675 U CN205449675 U CN 205449675U CN 201620248918 U CN201620248918 U CN 201620248918U CN 205449675 U CN205449675 U CN 205449675U
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- 239000003245 coal Substances 0.000 title claims abstract description 78
- 238000013112 stability test Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000012360 testing method Methods 0.000 claims abstract description 29
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- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
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- 238000004445 quantitative analysis Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 22
- 238000005065 mining Methods 0.000 description 17
- 238000012430 stability testing Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- MCSOAHVAIJXNDN-ZTFGCOKTSA-N ram-322 Chemical compound C1C(=O)CC[C@@]2(O)[C@H]3CC4=CC=C(OC)C(O)=C4[C@]21CCN3C MCSOAHVAIJXNDN-ZTFGCOKTSA-N 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
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- 239000004830 Super Glue Substances 0.000 description 1
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- 238000007792 addition Methods 0.000 description 1
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- 238000012669 compression test Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a strip coal column stability test device, the system comprises a test box, the loading unit, test stand and water supply unit, experimental box includes the hypoplastron, the posterior lateral plate, curb plate before transparent, the left side board, right side board and roof, the loading unit includes hydraulic assembly, left side pressure head, right side pressure head, go up the pressure head, pressurization case and water pocket, left pressure head is connected to hydraulic assembly hydraulic pressure, right side pressure head and last pressure head, the test stand includes left stand, right side stand and crossbeam, left stand is connected to left side pressure head, the support connnection alive left side board of left side pressure head, right stand is connected to right side pressure head, the support connnection right side alive board of right side pressure head, go up the pressure head and connect the crossbeam, go up the support connnection roof alive of pressure head, the water supply unit is through water path connection water pocket and water swivel. The beneficial effects of the utility model are that: strip coal column stability test device, the sound construction, the equipment is simple, and convenient operation can simulate strip exploitation process, and the experimental data that obtain are accurate to quantitative analysis is carried out to stability to the strip coal column.
Description
Technical Field
The utility model relates to a coal mining test equipment technical field especially relates to a strip coal pillar stability test device.
Background
Along with the development of urban construction and the improvement of coal mining intensity, the coal pressing quantity under buildings, water bodies and railways in China is rapidly increased, and strip mining is one of effective ways for solving the coal pressing quantity under the buildings, the water bodies and the railways. The strip mining is to divide strips with a certain size along the coal seam trend or trend in a mining range, extract one strip and reserve one strip, arrange the extracted strip and the reserved strip at intervals, support an overlying rock layer by means of a reserved strip coal pillar so as to reduce the subsidence of the overlying rock layer, control the movement of the rock layer, reduce mining damage and achieve the purpose of protecting earth surface buildings (structures), landforms and underground structures. In the practice of mining engineering, on one hand, the strip coal pillar is required to effectively support the overlying strata for a long time, but after the adjacent working face is completely pushed and mined, the strength of the strip coal pillar is reduced along with the prolonging of the acting time of the overlying strata due to the influence of rheological action along with the passage of time; on the other hand, in order to reduce resource waste and improve the coal recovery rate, the supporting capacity of the strip coal pillars needs to be fully utilized, the coal pillars reserved during the 'three lower' mining before the mining are adopted, meanwhile, the reserved coal pillars are larger and larger along with the increase of the mining depth, and the stress state, the space system structure and the mechanical property of the coal pillars are greatly and even essentially changed. The method adopted for researching the strip coal pillar in the prior art mainly comprises theoretical analysis, numerical calculation, field observation and indoor test. Theoretical analysis and numerical calculation ignore a large number of site uncertain factors, and the error is large; the strip coal pillar after the on-site observation and mining needs to enter the goaf again, so that the difficulty is high and certain danger exists; in the indoor test, a single-shaft or three-shaft coal rock compression test is mainly carried out by adopting an MTS (maximum Transmission System) servo, the strength of a coal rock body is mainly researched, and the size effect of the coal rock body and the coupling effect of stope water in coal seam mining are neglected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a strip coal pillar stability test device carries out quantitative analysis with simulation strip exploitation process and to the stability of strip coal pillar.
The utility model provides a strip coal pillar stability test device, including the test box, the loading unit, test stand and water supply unit, the test box includes the hypoplastron, the posterior lateral plate, the preceding lateral plate, left side board, right side board and upper plate, hypoplastron fixed connection posterior lateral plate, the anterior lateral plate that the posterior lateral plate was made by transparent material through bolted connection, the loading unit includes hydraulic assembly, left pressure head, right pressure head, the upper pressure head, pressurization case and water pocket, hydraulic assembly hydraulic connection left pressure head, right pressure head and upper pressure head, the pressurization case includes the seepage board, the pressurization upper plate, support slat and pressurization slat, the seepage hole has been seted up on the seepage board, fixedly connected with water swivel on the pressurization upper plate, support slat and seepage board, the fixed surface of pressurization upper plate is connected, pressurization slat and seepage board, the fixed connection all around of pressurization upper plate, the test stand includes left stand, right stand and crossbeam, crossbeam and left stand, right stand fixed connection, left pressure head assembly connection left stand, the pillar assembly connection left side board of a left side pressure head, right pressure head assembly connection right stand, the pillar assembly connection right side board of right pressure head, go up pressure head assembly connection crossbeam, go up the pillar assembly connection upper plate of pressure head, water supply unit is through water path connection water pocket and water swivel.
Furthermore, the pressurizing ribbon board comprises a pressurizing left ribbon board, a pressurizing right ribbon board, a pressurizing front ribbon board and a pressurizing rear ribbon board, the pressurizing left ribbon board and the pressurizing right ribbon board are fixedly connected with a semi-cylinder transition board, the outer surface of the transition board is in assembly connection with a rubber pad, grooves are formed in the pressurizing front ribbon board and the pressurizing rear ribbon board, and cylindrical rubber strips are in assembly connection with the grooves.
Further, the left edge, the right edge and the lower edge of the left side plate are provided with grooves, cylindrical rubber strips are arranged in the grooves in an assembly connection mode, the left edge, the right edge and the lower edge of the right side plate are provided with grooves, and the cylindrical rubber strips are arranged in the grooves in an assembly connection mode.
Furthermore, the left side plate or the right side plate is provided with a test connecting hole.
Furthermore, the hydraulic assembly comprises a hydraulic oil tank, a hydraulic motor, a hydraulic valve and a hydraulic meter which are connected in series through a hydraulic pipeline.
Furthermore, the water supply unit comprises a water tank, a water pressure pump, a water pressure gauge and a water pressure valve which are connected in series through a water path.
Compared with the prior art, the utility model discloses a strip coal pillar stability test device has following characteristics and advantage:
the utility model discloses a strip coal pillar stability test device, the sound construction, the equipment is simple, and convenient operation can simulate strip exploitation process, and the data that the experiment obtained are accurate to carry out quantitative analysis to the stability of strip coal pillar.
After reading the detailed description of the present invention in conjunction with the drawings, the features and advantages of the present invention will become more apparent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a strip coal pillar stability testing device for simulating a horizontal coal seam according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the strip coal pillar stability testing apparatus according to the embodiment of the present invention when simulating an inclined coal seam;
FIG. 3 is a schematic view of a part of the structure of the strip coal pillar stability testing apparatus in the embodiment of the present invention;
FIG. 4 is a schematic structural view of a pressure box in the strip coal pillar stability testing apparatus according to the embodiment of the present invention;
FIG. 5 is a schematic structural view of a left side plate and a right side plate of the strip coal pillar stability testing device in the embodiment of the present invention;
FIG. 6 is a schematic structural view of a water supply unit and a water bag in the strip coal pillar stability testing device according to the embodiment of the present invention;
wherein,
11. lower plate, 12, rear plate, 13, front plate, 14, left plate, 15, right plate, 16, upper plate, 2, bolt, 311, hydraulic tank, 312, hydraulic motor, 313, hydraulic valve, 314, hydraulic meter, 315, hydraulic pipeline, 321, left pressure head, 322, right pressure head, 323, upper pressure head, 33, pressure tank, 331, seepage plate, 332, pressure upper plate, 333, support strip, 334, pressure strip, 3341, transition plate, 335, water joint, 34, water pocket, 41, left upright, 42, right upright, 43, beam, 51, water tank, 52, water pressure pump, 53, water pressure meter, 54, water pressure valve, 55, water pipe, 6, test connection hole, 7, coal pillar, 81, top plate rock layer, 82, bottom plate rock layer, 83, concrete triangle block, 9, groove.
Detailed Description
As shown in fig. 1 to 6, the present embodiment provides a strip coal column stability testing apparatus, which includes a testing box, a loading unit, a testing frame, and a water supply unit. The test box body comprises a lower plate 11, a rear side plate 12, a front side plate 13, a left side plate 14, a right side plate 15 and an upper plate 16. The left edge, the right edge and the lower edge of the left side plate 14 are provided with grooves 9, cylindrical rubber strips are assembled and connected in the grooves 9, the left edge, the right edge and the lower edge of the right side plate 15 are provided with grooves 9, and cylindrical rubber strips are assembled and connected in the grooves 9. The left side plate 14 or the right side plate 15 is provided with a test connecting hole 6, a signal wire of the sensor and a water pipe 55 connected with the water bag 34 penetrate through the test connecting hole 6 to be connected with a computer, and after the required signal wire and the water pipe 55 are laid, the whole test hole connecting hole 6 is filled with super glue to prevent water seepage. The lower plate 11 is fixedly welded with a rear side plate 12, 10 screw holes are evenly distributed on two sides of the rear side plate 12, and the rear side plate 12 is connected with a front side plate 13 made of transparent organic glass material through bolts 2. The front side plate 13 is made of transparent materials, so that visual operation can be realized in the test process, and the organic glass material is high in strength and meets the mechanical requirements required by the test. The loading unit comprises a hydraulic assembly, a left ram 321, a right ram 322, an upper ram 323, a pressurized tank 33 and a water bladder 34. The water bladder 34 includes a plurality of water bladders 34 that may simulate the coal seam other than the coal pillar 7 in an unmined coal seam or fill in mining. When a coal seam with a certain height is simulated, water with a corresponding height is injected into the water bag 34, the water valve 54 is closed, and the water bag 34 can bear a certain pressure so as to simulate the stress of the coal seam. During mining, the water in the water bags 34 is discharged in a certain sequence according to the mining direction of the coal seam, and the excavation of the coal seam is simulated. It should be noted that the water bladder 34 may be supplied with water from a common water supply unit at the water connection 335, but the water pressure at the water bladder 34 is not the same as the water pressure at the water connection 335. The hydraulic assembly comprises a hydraulic oil tank 311, a hydraulic motor 312, a hydraulic valve 313 and a hydraulic gauge 314 which are connected in series through a hydraulic pipeline 315. The hydraulic assembly is connected to a left ram 321, a right ram 322 and an upper ram 323 via hydraulic lines 315. The length and width of the pressurizing box 33 are smaller than those of the left and right side plates 14 and 15 of the test box, so that the contact position of the pressurizing box with the left and right side plates 14 and 15 has a certain stroke. The pressurizing tank 33 includes a seepage plate 331, a pressurizing upper plate 332, a support slat 333, and a pressurizing slat 334. The pressurizing lath 334 comprises a pressurizing left lath, a pressurizing right lath, a pressurizing front lath and a pressurizing rear lath, the pressurizing left lath and the pressurizing right lath are fixedly connected with a semi-cylinder transition plate 3341, so that the pressurizing box 33 can be loaded in different coal seam inclination angle tests conveniently, and the outer surface of the transition plate 3341 is connected with a rubber pad in an assembling manner to seal the edge of the pressurizing box 33. The slat has seted up recess 9 before the pressurization with the slat behind the pressurization, and the assembly connection has the cylinder rubber strip in the recess 9 to realize the sealed of pressurization case 33 side reason. Seepage holes are uniformly formed in the seepage plate 331, so that water pressure can be applied to the coal pillar 7, the top plate rock stratum 81 and the bottom plate rock stratum 82, and the influence of certain water pressure on the stability of the coal pillar can be researched. The upper pressurizing plate 332 is fixedly connected with a water connector 335, the supporting strip plate 333 is fixedly connected with the inner surfaces of the seepage plate 331 and the upper pressurizing plate 332, and the pressurizing strip plate 334 is fixedly connected with the peripheries of the seepage plate 331 and the upper pressurizing plate 332. The test stand comprises a left upright column 41, a right upright column 42 and a cross beam 43, wherein the cross beam 43 is fixedly connected with the left upright column 41 and the right upright column 42. The left pressure head 321 is assembled and connected with the left upright post 41, the plunger of the left pressure head 321 is assembled and connected with the left side plate 14, the right pressure head 322 is assembled and connected with the right upright post 42, the plunger of the right pressure head 322 is assembled and connected with the right side plate 15, the upper pressure head 323 is assembled and connected with the cross beam 43, and the plunger of the upper pressure head 323 is assembled and connected with the upper plate 16. The water supply unit comprises a water tank 51, a water pressure pump 52, a water pressure gauge 53 and a water pressure valve 54 which are connected in series through a water pipe 55, and the water supply unit is connected with the water bag 34 and the water joint 335 through the water pipe 55.
The utility model also provides a strip coal pillar stability test method uses foretell strip coal pillar stability test device, including following step:
firstly, selecting concrete and other similar materials for a top plate rock stratum 81 and a bottom plate rock stratum 82, and selecting sampling coal or concrete and other similar materials for a coal pillar 7 reserved in a coal bed;
step two, paving a pressurizing box 33, a bottom plate rock stratum 82, a coal bed (a coal pillar 7 and a water bag 34), a top plate rock stratum 81 and the pressurizing box 33 in a test box body of the strip coal pillar stability test device layer by layer, paving water bags 34 which are as high as the coal pillar 7 at intervals at the positions of the coal bed, simulating the excavation of the coal bed by discharging water in the water bags 34, simulating the filling of a coal face goaf by filling water into the water bags 34, and burying a stress sensor, a displacement sensor and a pore water pressure sensor at the positions of the bottom plate rock stratum 82 and the top plate rock stratum 81;
step three, applying longitudinal pressure or transverse pressure or applying longitudinal pressure and transverse pressure simultaneously to the top rock stratum 81, the coal bed and the bottom rock stratum 82 through the loading unit, and filling water with corresponding pressure into the water bag 34;
step four, after the stress sensor reaches the stress standard, applying high-pressure water through the pressurizing box 33 at the upper part of the top plate rock stratum 81 and the pressurizing box 33 at the lower part of the bottom plate rock stratum 82 through the seepage plate 331;
Fifthly, the water bag 34 discharges water in the water bag 34 according to a set direction to simulate the excavation of a coal seam;
after the coal seam is excavated, releasing water through seepage holes in the seepage plates 331 according to the requirements of the test, and loading the top rock stratum 81, the coal seam and the bottom rock stratum 82 for a long time;
and seventhly, monitoring data such as stress, displacement and pore water pressure through the stress sensor, the displacement sensor and the pore water pressure sensor, and recording the data of the stress sensor, the displacement sensor and the pore water pressure sensor so as to perform quantitative analysis on the stability of the coal pillar 7.
In this embodiment, in order to ensure the balance of the strip coal pillar stability test apparatus when the coal seam has a certain inclination angle, a concrete triangular block 83 with an appropriate inclination angle is laid on the outer side of the pressure tank 33 in the second step according to the requirement of the coal seam inclination angle, so as to perform an inclined coal seam simulation test. If the filling mining is carried out, according to the mining process, in the step five, at intervals, the roof strata 81 are made to continue for a certain collapse movement time, and water with corresponding height or corresponding pressure is filled in the water bag 34 according to different filling rates.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (6)
1. The utility model provides a strip coal column stability test device which characterized in that: the test box comprises a lower plate, a rear side plate, a front side plate, a left side plate, a right side plate and an upper plate, wherein the lower plate is fixedly connected with the rear side plate, the rear side plate is connected with the front side plate made of a transparent material through a bolt, the loading unit comprises a hydraulic assembly, a left pressure head, a right pressure head, an upper pressure head, a pressurizing box and a water sac, the hydraulic assembly is hydraulically connected with the left pressure head, the right pressure head and the upper pressure head, the pressurizing box comprises a seepage plate, a pressurizing upper plate, a supporting strip plate and a pressurizing strip plate, seepage holes are formed in the seepage plate, a water joint is fixedly connected to the pressurizing upper plate, the supporting strip plate is fixedly connected with the seepage plate and the inner surface of the pressurizing upper plate, the pressurizing strip plate is fixedly connected with the seepage plate and the periphery of the pressurizing upper plate, the test frame comprises a left upright post, a right upright post and a cross beam, the cross beam is fixedly, the plunger assembly connection left side board of left side pressure head, right pressure head assembly connection right stand, the plunger assembly connection right side board of right side pressure head, go up pressure head assembly connection crossbeam, go up the plunger assembly connection upper plate of pressure head, water supply unit is through water path connection water pocket and water swivel.
2. The strip coal column stability test device according to claim 1, characterized in that: the pressurizing ribbon board comprises a pressurizing left ribbon board, a pressurizing right ribbon board, a pressurizing front ribbon board and a pressurizing rear ribbon board, the pressurizing left ribbon board and the pressurizing right ribbon board are fixedly connected with a semi-cylinder transition board, the outer surface of the transition board is connected with a rubber pad in an assembling mode, grooves are formed in the pressurizing front ribbon board and the pressurizing rear ribbon board, and cylindrical rubber strips are connected in the grooves in an assembling mode.
3. The strip coal column stability test device according to claim 1 or 2, characterized in that: the left edge, the right edge and the lower edge of the left side plate are provided with grooves, cylindrical rubber strips are arranged in the grooves in an assembly connection mode, the left edge, the right edge and the lower edge of the right side plate are provided with grooves, and the cylindrical rubber strips are arranged in the grooves in an assembly connection mode.
4. The strip coal column stability test device according to claim 3, characterized in that: the left side plate or the right side plate is provided with a test connecting hole.
5. The strip coal column stability test device according to claim 4, characterized in that: the hydraulic component comprises a hydraulic oil tank, a hydraulic motor, a hydraulic valve and a hydraulic meter which are connected in series through a hydraulic pipeline.
6. The strip coal column stability test device of claim 5, wherein: the water supply unit comprises a water tank, a water pressure pump, a water pressure meter and a water pressure valve which are connected in series through a water path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620248918.2U CN205449675U (en) | 2016-03-29 | 2016-03-29 | Strip coal column stability test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620248918.2U CN205449675U (en) | 2016-03-29 | 2016-03-29 | Strip coal column stability test device |
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| CN205449675U true CN205449675U (en) | 2016-08-10 |
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| CN201620248918.2U Expired - Fee Related CN205449675U (en) | 2016-03-29 | 2016-03-29 | Strip coal column stability test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716950A (en) * | 2016-03-29 | 2016-06-29 | 山东科技大学 | Strip coal pillar stability testing device and testing method |
| CN108226447A (en) * | 2018-01-31 | 2018-06-29 | 山东科技大学 | Coal underground mining surface movement three-dimensional simulation experimental rig and test method |
| CN108279297A (en) * | 2018-03-26 | 2018-07-13 | 山东科技大学 | Solid material strip filling stability simulation system, subject and method |
| CN111965327A (en) * | 2020-07-28 | 2020-11-20 | 临沂矿业集团菏泽煤电有限公司 | Plane model test device and method for stratum subsidence rule of thick surface soil and thin bedrock mining |
| CN112903462A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading |
| CN114062642A (en) * | 2020-07-30 | 2022-02-18 | 神华神东煤炭集团有限责任公司 | Horizontal loading mechanism and method for model test coal pillar under water sealing condition |
-
2016
- 2016-03-29 CN CN201620248918.2U patent/CN205449675U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716950A (en) * | 2016-03-29 | 2016-06-29 | 山东科技大学 | Strip coal pillar stability testing device and testing method |
| CN105716950B (en) * | 2016-03-29 | 2018-05-29 | 山东科技大学 | Strip coal pillar stabilizing test device and test method |
| CN108226447A (en) * | 2018-01-31 | 2018-06-29 | 山东科技大学 | Coal underground mining surface movement three-dimensional simulation experimental rig and test method |
| CN108226447B (en) * | 2018-01-31 | 2023-09-12 | 山东科技大学 | Three-dimensional simulation test device and test method for underground coal mining surface movement |
| CN108279297A (en) * | 2018-03-26 | 2018-07-13 | 山东科技大学 | Solid material strip filling stability simulation system, subject and method |
| CN111965327A (en) * | 2020-07-28 | 2020-11-20 | 临沂矿业集团菏泽煤电有限公司 | Plane model test device and method for stratum subsidence rule of thick surface soil and thin bedrock mining |
| CN111965327B (en) * | 2020-07-28 | 2021-10-08 | 临沂矿业集团菏泽煤电有限公司 | Plane model test device and method for stratum subsidence rule of thick surface soil and thin bedrock mining |
| CN114062642A (en) * | 2020-07-30 | 2022-02-18 | 神华神东煤炭集团有限责任公司 | Horizontal loading mechanism and method for model test coal pillar under water sealing condition |
| CN114062642B (en) * | 2020-07-30 | 2024-06-07 | 神华神东煤炭集团有限责任公司 | Horizontal loading mechanism and method for model test coal pillar under water sealing condition |
| CN112903462A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading |
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