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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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
This utility model relates to coal mining testing equipment technical field, particularly relates to a kind of strip coal pillar stabilizing test device.
Background technology
Along with development and the raising of coal mining intensity of urban construction, " three times " pressure coal amount under China's building, under water body, under railway increases the most rapidly, and Striping noise is one of effective way solving " three times " pressure coal.Striping noise is the band dividing certain size in limit of mining along bearing or tendency; extraction one, reservation one; extraction band is with reservation band alternately; rely on and retain strip coal pillar support overlying rock; to reduce the depression of overlying rock; control the movement of rock stratum, reduce Mining subsidence, it is achieved the purpose to the protection of earth's surface buildings or structures, landform, landforms and underground structure.In mining engineering practice, on the one hand, require that strip bearing block long term supports overlying rock effectively, but after Adjacent Working Face pushes to adopt, As time goes on, due to the impact of theomorphism, the intensity of strip coal pillar can reduce with the time lengthening of overlying rock effect；On the other hand, coal recovery rate is improved in order to reduce the wasting of resources, need to make full use of the bearing value of strip coal pillar, stay, during " three times " exploitation, the coal column set before exploitation, meanwhile, along with adopting deep increase, staying the coal column set also can be increasing, the stress of coal column, space system structure, mechanical property all there occurs the change of the most even essence.Strip coal pillar is studied the method used by prior art and mainly has theory analysis, numerical computations, field observation and laboratory test.Theoretical analysis and numerical method ignores a large amount of on-the-spot uncertain factor, and error is bigger；Strip coal pillar after field observation exploitation need to be again introduced into goaf, and difficulty is relatively big, there is certain risk；Laboratory test mainly uses MTS servo to carry out single shaft or three axle coal petrography compression tests, the intensity of main Study on Coal rock mass, have ignored the coupling of stope water in the dimensional effect of coal and rock and seam mining.
Utility model content
The purpose of this utility model is to provide a kind of strip coal pillar stabilizing test device to carry out quantitative analysis with dummy strip recovery process and to the stability of strip coal pillar.
nullThis utility model provides a kind of strip coal pillar stabilizing test device，Including test casing、Loading unit、Test stand and water supplying unit，Test casing includes lower plate、Back side panel、Front side board、Left plate、Right plate and upper plate，Lower plate is fixing connects back side panel，Back side panel connects the front side board made by transparent material through bolt，Loading unit includes hydraulic package、Left pressure head、Right pressure head、Seaming chuck、Pressurized tank and water pocket，The left pressure head of hydraulic package hydraulic connecting、Right pressure head and seaming chuck，Pressurized tank includes seepage flow plate、Pressurization upper plate、Support batten and pressurization batten，Seepage flow hole is offered on seepage flow plate，It is fixedly connected with water swivel on pressurization upper plate，Support batten and seepage flow plate、The inner surface of pressurization upper plate is fixing to be connected，Pressurization batten and seepage flow plate、The surrounding of pressurization upper plate is fixing to be connected，Test stand includes left column、Right column and crossbeam，Crossbeam and left column、Right column is fixing to be connected，Left pressure head assembly connection left column，The post assembly connection left plate alive of left pressure head，Right pressure head assembly connection right column，The post assembly connection right plate alive of right pressure head，Seaming chuck assembly connection crossbeam，The post assembly connection upper plate alive of seaming chuck，Water supplying unit connects water pocket and water swivel through water route.
Further, pressurization batten includes pressurizeing before left batten, the right batten that pressurizes, pressurization batten after batten and pressurization, pressurize left batten and be fixedly connected with semicylinder rebound on the right batten that pressurizes, the outer surface assembly connection of rebound has rubber blanket, after the front batten of pressurization and pressurization, batten offers groove, and in groove, assembly connection has cylinder rubber strip.
Further, the left margin of left plate, edge, the right and lower edge offer groove, and in groove, assembly connection has cylinder rubber strip, and the left margin of right plate, edge, the right and lower edge offer groove, and in groove, assembly connection has cylinder rubber strip.
Further, left plate or right plate offer test connecting hole.
Further, hydraulic package includes hydraulic oil container, hydraulic motor, hydraulic valve and the hydralic pressure gauge through fluid pressure line concatenation.
Further, water supplying unit includes water tank, water pressure pump, water pressure gauge and the hydraulic control valve through water route concatenation.
Compared with prior art, strip coal pillar stabilizing test device of the present utility model has the characteristics that and advantage:
Strip coal pillar stabilizing test device of the present utility model, sound construction, assemble simple, easy to operate, the data obtained can be tested accurate with dummy strip recovery process, carry out quantitative analysis with the stability to strip coal pillar.
After reading in conjunction with the accompanying detailed description of the invention of the present utility model, feature of the present utility model and advantage will become clearer from.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is structural representation during strip coal pillar stabilizing test device dummy level coal seam in this utility model embodiment；
Fig. 2 is structural representation during strip coal pillar stabilizing test device simulation inclined seam in this utility model embodiment；
Fig. 3 is the part-structure schematic diagram of strip coal pillar stabilizing test device in this utility model embodiment；
Fig. 4 is the structural representation of pressurized tank in strip coal pillar stabilizing test device in this utility model embodiment；
Fig. 5 is left plate and the structural representation of right plate in strip coal pillar stabilizing test device in this utility model embodiment；
Fig. 6 is water supplying unit and the structural representation of water pocket in strip coal pillar stabilizing test device in this utility model embodiment；
Wherein,
null11、Lower plate，12、Back side panel，13、Front side board，14、Left plate，15、Right plate，16、Upper plate，2、Bolt，311、Hydraulic oil container，312、Hydraulic motor，313、Hydraulic valve，314、Hydralic pressure gauge，315、Fluid pressure line，321、Left pressure head，322、Right pressure head，323、Seaming chuck，33、Pressurized tank，331、Seepage flow plate，332、Pressurization upper plate，333、Support batten，334、Pressurization batten，3341、Rebound，335、Water swivel，34、Water pocket，41、Left column，42、Right column，43、Crossbeam，51、Water tank，52、Water pressure pump，53、Water pressure gauge，54、Hydraulic control valve，55、Water pipe，6、Test connecting hole，7、Coal column，81、Roof strata，82、Floor strata，83、Concrete corner block，9、Groove.
Detailed description of the invention
As shown in Figures 1 to 6, the present embodiment provides a kind of strip coal pillar stabilizing test device, including test casing, loading unit, test stand and water supplying unit.Test casing includes lower plate 11, back side panel 12, front side board 13, left plate 14, right plate 15 and upper plate 16.The left margin of left plate 14, edge, the right and lower edge offer groove 9, and in groove 9, assembly connection has cylinder rubber strip, the left margin of right plate 15, edge, the right and lower edge to offer groove 9, and in groove 9, assembly connection has cylinder rubber strip.Left plate 14 or right plate 15 offer test connecting hole 6, the water pipe 55 of the holding wire of sensor and connection water pocket 34 connects computer through test connecting hole 6, after having laid desired signal line and water pipe 55, use seccotine to fill whole experimental port connecting hole 6, prevent infiltration.Lower plate 11 fixing welding back side panel 12, is evenly arranged 10 screws in back side panel 12 both sides, and back side panel 12 connects the front side board 13 made by clear perspex material through bolt 2.Front side board 13 is transparent material, can realize visual operation in process of the test, and pmma material intensity is high, meets the mechanical requirements needed for test.Loading unit includes hydraulic package, left pressure head 321, right pressure head 322, seaming chuck 323, pressurized tank 33 and water pocket 34.Water pocket 34 includes several, and water pocket 34 can simulate in unquarried coal seam the obturator when coal seam in addition to coal column 7 or filling mining.When simulating the coal seam of certain altitude, injecting the water body of corresponding height in water pocket 34, close hydraulic control valve 54, now water pocket 34 can bear certain pressure, to simulate coal seam stress.During exploitation, several water pockets 34 release the water in water pocket 34, the excavation in simulation coal seam in a certain order according to the direction of seam mining.It should be noted that water pocket 34 can share water supplying unit water supply at water swivel 335, but the hydraulic pressure at water pocket 34 and at water swivel 335 is inconsistent.Hydraulic package includes hydraulic oil container 311, hydraulic motor 312, hydraulic valve 313 and the hydralic pressure gauge 314 through fluid pressure line 315 concatenation.Hydraulic package connects left pressure head 321, right pressure head 322 and seaming chuck 323 through fluid pressure line 315.The length of pressurized tank 33 and width are less than left plate 14 and the right plate 15 of proof box, in order to pressurized tank and left plate 14, the contact position of right plate 15 have certain stroke.Pressurized tank 33 includes seepage flow plate 331, pressurization upper plate 332, supports batten 333 and pressurization batten 334.Pressurization batten 334 includes pressurizeing before left batten, the right batten that pressurizes, pressurization batten after batten and pressurization, pressurize left batten and be fixedly connected with semicylinder rebound 3341 on the right batten that pressurizes, it is easy to pressurized tank 33 realize loading in the test of different coal inclination angle, the outer surface assembly connection of rebound 3341 has rubber blanket, to realize the sealing at pressurized tank 33 edge.After the front batten of pressurization and pressurization, batten offers groove 9, and in groove 9, assembly connection has cylinder rubber strip, to realize the sealing of pressurized tank 33 lateral edges.Uniformly offer seepage flow hole on seepage flow plate 331, can realize coal column 7, roof strata 81, floor strata 82 are applied hydraulic pressure, it is achieved study the impact on stability of coal pillar of certain hydraulic pressure.Being fixedly connected with water swivel 335 on pressurization upper plate 332, support batten 333 is fixing with the inner surface of seepage flow plate 331, pressurization upper plate 332 to be connected, and pressurization batten 334 is fixed with the surrounding of seepage flow plate 331, pressurization upper plate 332 and is connected.Test stand includes that left column 41, right column 42 and crossbeam 43, crossbeam 43 are fixed be connected with left column 41, right column 42.Left pressure head 321 assembly connection left column 41, the post assembly connection left plate 14 alive of left pressure head 321, right pressure head 322 assembly connection right column 42, the post assembly connection right plate 15 alive of right pressure head 322, seaming chuck 323 assembly connection crossbeam 43, the post assembly connection upper plate 16 alive of seaming chuck 323.Water supplying unit includes water tank 51, water pressure pump 52, water pressure gauge 53 and the hydraulic control valve 54 through water pipe 55 concatenation, and water supplying unit connects water pocket 34 and water swivel 335 through water pipe 55.
This utility model also provides for a kind of strip coal pillar stability testing method, applies above-mentioned strip coal pillar stabilizing test device, comprises the following steps:
Step one, roof strata 81, floor strata 82 select the analog materials such as concrete, and the coal column 7 retained in coal seam selects the sampling analog material such as coal or concrete；
Step 2, in the proof box body of strip coal pillar stabilizing test device, successively lay pressurized tank 33, floor strata 82, coal seam (coal column 7 and water pocket 34), roof strata 81, pressurized tank 33, the water pocket 34 contour with coal column 7 is laid in compartment of terrain, position, coal seam, the excavation in coal seam can be simulated by releasing the water in water pocket 34, by the filling to coal work face goaf can be simulated toward water-filling in water pocket 34, bury strain gauge, displacement transducer and pore water pressure sensor underground at floor strata 82 and roof strata 81 position；
Step 3, by loading unit, roof strata 81, coal seam, floor strata 82 are applied longitudinal pressure or transverse pressure, or apply longitudinal pressure and transverse pressure simultaneously, in water pocket 34, fill the water of relevant pressure；
After step 4, strain gauge reach stress criterion, apply water under high pressure by the pressurized tank 33 on roof strata 81 top and the pressurized tank 33 of floor strata 82 bottom through seepage flow plate 331；
Step 5, water pocket 34 release the water in water pocket 34 to simulate the excavation in coal seam according to the direction set；
After step 6, coal seam excavation, according to the needs of test, seepage flow plate 331 discharges water through seepage flow hole, and roof strata 81, coal seam, floor strata 82 are loaded for a long time；
Step 7, carry out the data such as monitor stress, displacement, pore water pressure through strain gauge, displacement transducer and pore water pressure sensor, record strain gauge, displacement transducer and the data of pore water pressure sensor, carry out quantitative analysis with the stability to coal column 7.
It should be noted that in the present embodiment, when there is certain inclination angle in coal seam, for ensureing the balance of strip coal pillar stabilizing test device, according to the needs of seam inclination, step 2 is laid the concrete corner block 83 at suitable inclination angle in the outside of pressurized tank 33, to carry out inclined seam simulation test.If carrying out filling mining, according to the process of exploitation, certain interval of time in step 5, roof strata 81 is made to continue the most certain to be caving movement time, according to the difference of pack completeness to water pocket 34 filling respective heights or the water of corresponding pressure.
Certainly; described above is not to restriction of the present utility model; this utility model is also not limited to the example above, change that those skilled in the art are made in essential scope of the present utility model, retrofits, adds or replaces, and also should belong to protection domain of the present utility model.
Claims (6)
- null1. a strip coal pillar stabilizing test device，It is characterized in that: include testing casing、Loading unit、Test stand and water supplying unit，Test casing includes lower plate、Back side panel、Front side board、Left plate、Right plate and upper plate，Lower plate is fixing connects back side panel，Back side panel connects the front side board made by transparent material through bolt，Loading unit includes hydraulic package、Left pressure head、Right pressure head、Seaming chuck、Pressurized tank and water pocket，The left pressure head of hydraulic package hydraulic connecting、Right pressure head and seaming chuck，Pressurized tank includes seepage flow plate、Pressurization upper plate、Support batten and pressurization batten，Seepage flow hole is offered on seepage flow plate，It is fixedly connected with water swivel on pressurization upper plate，Support batten and seepage flow plate、The inner surface of pressurization upper plate is fixing to be connected，Pressurization batten and seepage flow plate、The surrounding of pressurization upper plate is fixing to be connected，Test stand includes left column、Right column and crossbeam，Crossbeam and left column、Right column is fixing to be connected，Left pressure head assembly connection left column，The post assembly connection left plate alive of left pressure head，Right pressure head assembly connection right column，The post assembly connection right plate alive of right pressure head，Seaming chuck assembly connection crossbeam，The post assembly connection upper plate alive of seaming chuck，Water supplying unit connects water pocket and water swivel through water route.
- Strip coal pillar stabilizing test device the most according to claim 1, it is characterized in that: pressurization batten includes pressurizeing before left batten, the right batten that pressurizes, pressurization batten after batten and pressurization, pressurize left batten and be fixedly connected with semicylinder rebound on the right batten that pressurizes, the outer surface assembly connection of rebound has rubber blanket, after the front batten of pressurization and pressurization, batten offers groove, and in groove, assembly connection has cylinder rubber strip.
- Strip coal pillar stabilizing test device the most according to claim 1 and 2, it is characterized in that: the left margin of left plate, edge, the right and lower edge offer groove, in groove, assembly connection has cylinder rubber strip, the left margin of right plate, edge, the right and lower edge offer groove, and in groove, assembly connection has cylinder rubber strip.
- Strip coal pillar stabilizing test device the most according to claim 3, it is characterised in that: left plate or right plate offer test connecting hole.
- Strip coal pillar stabilizing test device the most according to claim 4, it is characterised in that: hydraulic package includes hydraulic oil container, hydraulic motor, hydraulic valve and the hydralic pressure gauge through fluid pressure line concatenation.
- Strip coal pillar stabilizing test device the most according to claim 5, it is characterised in that: water supplying unit includes water tank, water pressure pump, water pressure gauge and the hydraulic control valve through water route concatenation.
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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