CN220226913U - Gob-side entry retaining supporting structure for fragile surrounding rock mass of extremely-close thin coal seam group - Google Patents
Gob-side entry retaining supporting structure for fragile surrounding rock mass of extremely-close thin coal seam group Download PDFInfo
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- CN220226913U CN220226913U CN202322010649.9U CN202322010649U CN220226913U CN 220226913 U CN220226913 U CN 220226913U CN 202322010649 U CN202322010649 U CN 202322010649U CN 220226913 U CN220226913 U CN 220226913U
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- wall
- buffer
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- groove
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- 239000003245 coal Substances 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 title claims abstract description 12
- 239000000872 buffer Substances 0.000 claims abstract description 54
- 238000013016 damping Methods 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Vibration Dampers (AREA)
Abstract
The utility model discloses an extremely-close thin coal seam group fragile surrounding rock mass gob-side entry supporting structure, which relates to the field of coal mine supporting and comprises a plurality of arc-shaped frame bodies, wherein one end of each arc-shaped frame body is connected with a movable column, the outer wall of each movable column is provided with a fixed seat, the inner wall of each fixed seat is provided with a through groove, the inner wall of each through groove is filled with a buffer layer, and a cavity is formed below each through groove in the fixed seat. According to the utility model, the movable column is matched with the fixed seat to buffer the pressure borne by the arc-shaped frame body, after the arc-shaped frame body is stressed, the movable column is pushed to move towards the inside of the fixed seat to buffer the pressure through the buffer layer, meanwhile, when the buffer layer is stressed, the movable plug moves downwards along the cavity, air is arranged in the cavity, and under a sealed environment, the air can be used as a buffer medium to buffer the pressure and is matched with the buffer mechanism on the inner wall of the fixed seat, so that the compression resistance effect of the whole arc-shaped frame body is effectively improved.
Description
Technical Field
The utility model relates to the field of coal mine support, in particular to an extremely-close thin coal seam group fragile surrounding rock body gob-side entry supporting structure.
Background
Coal mines are areas where human beings mine coal resources in mining areas rich in coal and are generally divided into underground coal mines and open pit coal mines, coal is generally selected to be mined into underground mining tunnels when a coal bed is far away from the ground surface, the underground coal mines are the underground coal mines, and the direct stripping of earth surface soil layers is generally selected to mine coal when the coal bed is very close to the ground surface, the open pit coal mines are the open pit coal mines, and most of coal mines in China belong to the underground coal mines.
The existing tunnel protection method for the coal mine tunnel with the extremely close thin coal seam adopts a mode of retaining a tunnel protection coal pillar or building a cement pier wall to carry out gob-side entry protection, and in the construction process of the tunnel, a steel arch frame is required to support the tunnel.
In the use process of the steel arch, one of the functions is to serve as a fulcrum of the advanced support, but the fulcrum is required to support more weight, and in the use process of the existing steel arch, the supporting capacity of the arch is mostly supported through the bearing of steel, so that the steel arch can deform, and the safety of tunnel construction is endangered.
Disclosure of Invention
Based on the above, the utility model aims to provide the gob-side entry supporting structure for the fragile surrounding rock body of the extremely-close thin coal seam group, so as to solve the technical problem that the support of a common steel arch is mostly carried out by self bearing.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an extremely near thin coal seam crowd breakable surrounding rock body gob-side entry supporting construction, includes a plurality of arc frame bodies, the one end of arc frame body is connected with movable column, the outer wall of movable column is provided with the fixing base, logical groove has been seted up to the inner wall of fixing base, the inner wall packing of logical groove has the buffer layer, the cavity has been seted up to the inside of fixing base below that lies in logical groove, the inner wall of cavity is provided with movable plug, the inner wall of fixing base is provided with buffer gear.
The utility model further provides that the buffer mechanism comprises a buffer groove, a fixed block, a connecting column and a spring, wherein the buffer groove is formed in the inner wall of the fixed seat, the fixed block is arranged on the outer wall of the movable column, the connecting column is arranged at the bottom of the fixed block, and the bottom wall of the buffer groove is connected with the spring.
The utility model further provides that the inner wall of the buffer tank is provided with a damping layer.
The utility model is further characterized in that the bottom of the fixing seat is provided with supporting legs, and the supporting legs are fixed on the side wall of the tunnel.
The utility model is further characterized in that the arc-shaped frame bodies can be connected in a combined mode, and the arc-shaped frame bodies are connected through the connecting seat.
In summary, the utility model has the following advantages: according to the utility model, the movable column is matched with the fixed seat to buffer the pressure borne by the arc-shaped frame body, after the arc-shaped frame body is stressed, the movable column is pushed to move towards the inside of the fixed seat to buffer the pressure through the buffer layer, meanwhile, when the buffer layer is stressed, the movable plug moves downwards along the cavity, air is arranged in the cavity, and under a sealed environment, the air can be used as a buffer medium to buffer the pressure and is matched with the buffer mechanism on the inner wall of the fixed seat, so that the compression resistance effect of the whole arc-shaped frame body is effectively improved.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a schematic diagram showing the structural connection between a fixed base and a movable column according to the present utility model;
fig. 3 is a schematic view of the internal structure of the fixing base of the present utility model.
In the figure: 1. an arc-shaped frame body; 2. a movable column; 3. a fixing seat; 4. support legs; 5. a through groove; 6. a cavity; 7. a movable plug; 8. a buffer layer; 9. a buffer tank; 10. a fixed block; 11. a connecting column; 12. a spring; 13. and a connecting seat.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.
The utility model provides an extremely near thin coal seam crowd breakable surrounding rock body gob-side entry supporting construction, as shown in fig. 1-3, includes a plurality of arc frame body 1, and fixing base 3 bottom is provided with supporting leg 4, and supporting leg 4 is fixed in the tunnel lateral wall, but arc frame body 1 composite connection, but be connected through connecting seat 13 between the arc frame body 1, arc frame body 1 is accomplished through connecting seat 13 combination after, supports colliery tunnel, and supporting leg 4 is connected whole supporting construction and colliery tunnel.
The one end of arc frame body 1 is connected with movable column 2, the outer wall of movable column 2 is provided with fixing base 3, logical groove 5 has been seted up to the inner wall of fixing base 3, the buffer layer 8 has been filled to the inner wall of logical groove 5, cavity 6 has been seted up to the inside of fixing base 3 is located the below of logical groove 5, the inner wall of cavity 6 is provided with movable stopper 7, the inner wall of fixing base 3 is provided with buffer gear, the pressure that receives arc frame body 1 through movable column 2 and fixing base 3 cooperation, after arc frame body 1 received the pressure, promote movable column 2 to fixing base 3 internal motion, buffer pressure through buffer layer 8, simultaneously after buffer layer 8 received the pressure, movable stopper 7 moves down along cavity 6, cavity 6 inside is the air, under the sealing environment, the air can be as buffer medium, buffer pressure, the buffer gear of cooperation fixing base 3 inner wall, the effectual resistance to compression effect that has promoted whole arc frame body 1.
In the above-mentioned structure, buffer gear includes buffer tank 9, fixed block 10, spliced pole 11 and spring 12, set up buffer tank 9 in the inner wall of fixing base 3, the outer wall of movable column 2 is provided with fixed block 10, the bottom of fixed block 10 is provided with spliced pole 11, the diapire of buffer tank 9 is connected with spring 12, after arc frame body 1 receives the pressure, movable column 2 downstream, fixed block 10 and spliced pole 11 downstream synchronous motion, buffer the pressure by spring 12, cooperation buffer layer 8 and air buffer medium have realized the better cushioning effect to arc frame body 1.
Further, the inner wall of the buffer groove 9 is provided with a damping layer, and the damping layer can promote friction between the buffer groove 9 and the connecting column 11, so that the buffer effect is better.
The buffer layer 8 is made of silica gel, and when the movable column 2 extrudes the buffer layer 8, the silica gel can be extruded into a gap between the movable column 2 and the fixed seat 3, so that a better buffer effect on the arc-shaped frame body 1 is further achieved.
Working principle: the pressure that receives arc frame body 1 through movable column 2 and fixing base 3 cooperation is buffered, after arc frame body 1 received the pressure, promotes movable column 2 to fixing base 3 inside motion, buffers pressure through buffer layer 8, and simultaneously when buffer layer 8 received the pressure after, movable plug 7 was along cavity 6 downstream, and cavity 6 inside is the air, and under the sealed environment, the air can be regarded as buffer medium, buffers the pressure, cooperates the buffer mechanism of fixing base 3 inner wall, the effectual resistance to compression effect that has promoted whole arc frame body 1.
Although embodiments of the utility model have been illustrated and described, the specific embodiments are illustrative of the utility model and are not to be construed as limiting the utility model, as the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (5)
1. Friable surrounding rock body gob-side entry retaining support structure of extremely close thin coal seam crowd, including a plurality of arc frame bodies (1), its characterized in that: the one end of arc frame body (1) is connected with movable column (2), the outer wall of movable column (2) is provided with fixing base (3), logical groove (5) have been seted up to the inner wall of fixing base (3), the inner wall of leading to groove (5) is filled with buffer layer (8), cavity (6) have been seted up to the inside of fixing base (3) below that is located logical groove (5), the inner wall of cavity (6) is provided with movable stopper (7), the inner wall of fixing base (3) is provided with buffer gear.
2. The ultra-short distance thin coal seam group fragile surrounding rock mass gob-side entry retaining structure according to claim 1, wherein: the buffering mechanism comprises a buffering groove (9), a fixed block (10), a connecting column (11) and a spring (12), wherein the buffering groove (9) is formed in the inner wall of the fixed seat (3), the fixed block (10) is arranged on the outer wall of the movable column (2), the connecting column (11) is arranged at the bottom of the fixed block (10), and the spring (12) is connected with the bottom wall of the buffering groove (9).
3. The ultra-short distance thin coal seam group fragile surrounding rock mass gob-side entry retaining structure according to claim 2, wherein: the inner wall of the buffer groove (9) is provided with a damping layer.
4. The ultra-short distance thin coal seam group fragile surrounding rock mass gob-side entry retaining structure according to claim 1, wherein: the bottom of the fixing seat (3) is provided with supporting legs (4), and the supporting legs (4) are fixed on the side wall of the tunnel.
5. The ultra-short distance thin coal seam group fragile surrounding rock mass gob-side entry retaining structure according to claim 1, wherein: the arc-shaped frame bodies (1) can be connected in a combined mode, and the arc-shaped frame bodies (1) are connected through connecting seats (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322010649.9U CN220226913U (en) | 2023-07-28 | 2023-07-28 | Gob-side entry retaining supporting structure for fragile surrounding rock mass of extremely-close thin coal seam group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322010649.9U CN220226913U (en) | 2023-07-28 | 2023-07-28 | Gob-side entry retaining supporting structure for fragile surrounding rock mass of extremely-close thin coal seam group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220226913U true CN220226913U (en) | 2023-12-22 |
Family
ID=89182907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322010649.9U Active CN220226913U (en) | 2023-07-28 | 2023-07-28 | Gob-side entry retaining supporting structure for fragile surrounding rock mass of extremely-close thin coal seam group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220226913U (en) |
-
2023
- 2023-07-28 CN CN202322010649.9U patent/CN220226913U/en active Active
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