CN219733432U - Roof cavity slip casting anchor rope truss supporting construction - Google Patents
Roof cavity slip casting anchor rope truss supporting construction Download PDFInfo
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- CN219733432U CN219733432U CN202320987233.XU CN202320987233U CN219733432U CN 219733432 U CN219733432 U CN 219733432U CN 202320987233 U CN202320987233 U CN 202320987233U CN 219733432 U CN219733432 U CN 219733432U
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- anchor cable
- roof
- hollow grouting
- steel belt
- roadway
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title description 6
- 238000007569 slipcasting Methods 0.000 title description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000003245 coal Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 238000005065 mining Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The length of the steel belt is matched with the width of the roadway top plate, the steel belt is closely paved on the lower surface of the roadway top plate in a manner perpendicular to the trend of the roadway, and a pair of anchor rope mounting holes are correspondingly formed at two end parts of the steel belt; the anchor cable truss is arranged on the lower surface of the steel belt in parallel with the steel belt, and a pair of transverse through holes are formed in the front part and the rear part of the anchor cable truss in parallel; the anchoring sections of the two hollow grouting anchor cables penetrate through a pair of anchor cable mounting holes respectively and are anchored in deep stable rock strata on two sides of a roadway roof in a relatively tilting mode; the tail parts of the two hollow grouting anchor cables reversely and alternately pass through a pair of transverse through holes on the anchor cable truss and are respectively fixedly connected with two anchor cable locks; the grouting core pipe of the hollow grouting anchor cable extends to the lower part of the steel belt; the anchor cable lockset is used for providing pretightening force for the hollow grouting anchor cable in cooperation with the anchor cable truss. The structure can effectively improve the integrity and stability of the roadway roof and can meet the supporting requirement of the control of the broken roadway roof.
Description
Technical Field
The utility model belongs to the technical field of mine roadway support, and particularly relates to a roof hollow grouting anchor cable truss support structure.
Background
With the continuous development of the coal mining industry in China, the problems of various occurrence types of coal in China, complex mining environment, common and strong mining influence and the like are gradually highlighted. Under the current history and industry development, the occurrence of coal resources in shallow coal mines in China is greatly reduced, the coal resource exploitation is gradually transferred to deep coal mines, the number of soft rock mines in China is continuously increased, the problem that tunnel roof is broken and soft in the process is more remarkable, and the underground safety production work is greatly influenced. As a ubiquitous tunnel roof form, the weak roof tunnel is extremely easy to separate and collapse after being influenced by mining disturbance due to complex roof rock layer structure, so that the tunnel supporting difficulty is increased, and the tunnel is extremely easy to deform greatly to influence the safe production of a working face. How to effectively control the deformation of surrounding rock of a weak composite roof roadway becomes a problem to be solved in the current stage.
The supporting problem of the soft broken roadway roof is mainly reflected in that the stoping roadway is easy to collapse and separate from layers due to the mining influence, so that a series of problems of large deformation of the roadway, too short roof control distance of a roof supporting structure, difficult supporting structure arrangement and the like are caused, and in the existing supporting technology for the soft broken roadway roof, the traditional methods of anchor vertical supporting, reducing row spacing among anchor cables, grouting and the like are still generally adopted. Because of poor fracture continuity of the top plate, the vertical arrangement of the common anchor cable has small roof control depth and roof control width, and the roof control depth and roof control width are easy to break in the process of stress rebalancing of surrounding rocks of a roadway to cause accidents; the method for reducing the row spacing between the anchor cables has limited use effect, and the shortest distance is reduced in partial cases, so that the stable support still cannot be achieved; the grouting reinforcement method has good close-range supporting effect on the broken coal seam roof, and the simple grouting is difficult to meet the supporting requirement under the condition of large roof breaking range.
In summary, the grouting anchor cable supporting design of the broken soft top plate is urgently required to be a new supporting technology, so that the integrity and stability of the roadway top plate are effectively improved, the construction difficulty and supporting cost are reduced, and the control and supporting requirements of the broken roadway top plate are met.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a roof hollow grouting anchor cable truss supporting structure which has the advantages of simple structure, low manufacturing cost and ideal supporting effect, can effectively improve the integrity and stability of a roadway roof, is beneficial to reducing the construction difficulty and the supporting cost, and can meet the supporting requirement of controlling the broken roadway roof.
In order to achieve the above purpose, the utility model provides a roof hollow grouting anchor cable truss support structure, which comprises a steel belt, an anchor cable truss and two hollow grouting anchor cables;
the length of the steel belt is matched with the width of the roadway top plate, the steel belt is closely paved on the lower surface of the roadway top plate in a manner of being perpendicular to the trend of the roadway, and a pair of anchor cable mounting holes are correspondingly formed at two end parts of the steel belt;
the anchor cable truss is arranged on the lower surface of the steel belt in parallel with the steel belt and is positioned in the area between the pair of anchor cable mounting holes;
the anchoring sections of the two hollow grouting anchor cables respectively penetrate through a pair of anchor cable mounting holes and are anchored in the stable rock stratum at the two sides of the roadway roof in a relatively tilting mode; the tail parts of the two hollow grouting anchor cables reversely and alternately penetrate through the anchor cable truss and are fixedly connected with two anchor cable locks respectively; the grouting core pipe in each hollow grouting anchor cable extends out of the steel belt from the anchor cable mounting hole at the corresponding side;
the anchor cable lockset is used for providing pretightening force for the hollow grouting anchor cable by matching with the anchor cable truss and compacting the steel belt on the tunnel roof.
Further, in order to improve the overall supporting effect, the included angle between the direction of the hollow grouting anchor cable which is driven into the tunnel top plate and the vertical plane is 8-90 degrees.
Further, in order to remarkably improve the supporting capability of the supporting structure on the soft top plate, the grouting section of the hollow grouting anchor cable is positioned at a part between the stable rock stratum and the soft top plate, and grouting materials are filled in the rock stratum of the area where the grouting section is positioned. Through adding grouting material between stable stratum and soft roof, not only can utilize grouting material to strengthen the bonding strength of soft roof part's self, simultaneously, can carry out effectual bonding with soft roof and stable stratum, in addition, can also utilize cavity slip casting anchor rope 1 to further strengthen the joint strength between soft roof and the stable stratum to can multiple improvement to the supporting effect of soft roof.
Preferably, the grouting material is cement slurry, chemical slurry or other slurry suitable for reinforcing coal mine roadways.
Preferably, the length of the hollow grouting anchor cable is 3-15 m.
Further, in order to improve the overall supporting effect, the distance between the anchor cable installation hole and the adjacent roadway side part is 200-2000 mm.
Preferably, the steel strip is an M-type steel strip, a W-type steel strip, a T-type steel strip, an H-type steel strip, a steel strip made of I-steel or a steel strip made of channel steel.
According to the utility model, the anchoring sections of the pair of hollow grouting anchor cables are anchored in the stable rock stratum in a relatively inclined manner, and the anchoring sections are fixedly connected with the rock stratum in the region through the anchoring agent, so that stable and reliable force supporting points can be provided for the hollow grouting anchor cables, and the hollow grouting anchor cables can have more stable bearing capacity in the subsequent supporting process. Steel strips are arranged at the roadway roof, two hollow grouting anchor cables penetrate through a pair of anchor cable mounting holes at two ends of the steel strips, and then the two hollow grouting anchor cables are connected by utilizing anchor cable trusses which are arranged below the steel strips in parallel and matched with anchor cable locks, so that the application angle of the prestress of the hollow grouting anchor cables can be changed by utilizing the anchor cable mounting holes and the anchor cable trusses on the steel strips, and therefore, the steel strips can obtain certain prestress in the horizontal direction and the vertical direction, and then the hollow grouting anchor cables can be matched for effectively anchoring the broken soft roof, and the problem of anchor cable support design of the broken soft roof is solved. The grouting core pipe in the hollow grouting anchor cable extends out of the steel belt from the anchor cable mounting hole at the corresponding side, grouting materials can be conveniently injected into the grouting section of the hollow grouting anchor cable by using the grouting core pipe, so that the anchoring strength of the anchor cable to the top plate can be further enhanced by the grouting materials after the supporting is finished, and compared with a structure in the prior art that the supporting capability can be remarkably improved by only supporting the anchor cable.
According to the utility model, the anchor cable lockset, the anchor cable truss, the steel belt and the hollow grouting anchor cable are combined to form the combined supporting structure, the hollow grouting anchor cable and the steel belt are applied with pretightening force to change the hollow grouting anchor cable and the steel belt into an active stress system, so that the hollow grouting anchor cable and the steel belt become the first step of effectively controlling and preventing deformation and displacement of a broken soft top plate, meanwhile, the supporting capability is further improved by utilizing the grouting core pipe in a grouting mode after the combined supporting structure is formed, the integral stability of the top plate of the roadway is obviously improved, the control effect of the top plate of the broken roadway is effectively improved, meanwhile, the plate integrity and the stability of the top plate of the broken roadway are enhanced, the surrounding rock safety coefficient of the top plate of the broken roadway is improved, the construction difficulty and the supporting cost are reduced, and the requirement of controlling and supporting the top plate of the broken roadway is fully met.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view of the assembly of the anchor line truss and hollow grouting anchor line of the present utility model.
In the figure: 1. hollow grouting anchor cable; 2. an anchor section; 3. grouting section; 4. an anchor cable lockset; 5. an anchor cable truss; 6. a steel strip; 7. anchor cable mounting holes, 8, grouting core tubes, 9 and grouting materials.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model provides a roof hollow grouting anchor cable truss support structure, which comprises a steel belt 6, an anchor cable truss 5 and two hollow grouting anchor cables 1;
the length of the steel belt 6 is matched with the width of the roadway top plate, the steel belt is closely paved on the lower surface of the roadway top plate in a manner of being perpendicular to the trend of the roadway, and a pair of anchor cable mounting holes 7 are correspondingly formed at two end parts of the steel belt;
the anchor cable truss 5 is arranged on the lower surface of the steel belt 6 in parallel with the steel belt 6 and is positioned in the area between the pair of anchor cable mounting holes 7;
the anchoring sections 2 of the two hollow grouting anchor cables 1 respectively penetrate through a pair of anchor cable mounting holes 7 and are anchored in stable rock strata on two sides of a roadway roof in a relatively tilting manner, namely the anchoring sections 2 are fixedly connected with the rock strata in the area through anchoring agents; the tail parts of the two hollow grouting anchor cables 1 reversely and alternately pass through anchor cable trusses 5 and are respectively fixedly connected with two anchor cable locks 4; as a preference, the inclined portions of the two hollow grouting anchor lines 1 are relatively symmetrical, and the anchor sections 2 extend obliquely in directions away from each other; the grouting core pipe 8 in each hollow grouting anchor cable 1 extends out of the steel belt 6 from the anchor cable mounting hole 7 at the corresponding side;
the anchor cable lockset 4 is used for providing pretightening force for the hollow grouting anchor cable 1 by matching with the anchor cable truss 5 and compacting the steel belt 6 on the roadway roof.
In order to improve the overall supporting effect, the included angle between the direction of the hollow grouting anchor cable 1 which is driven into the tunnel roof and the vertical plane is 8-90 degrees.
In order to remarkably improve the supporting capability of the supporting structure on the soft top plate, the grouting section 3 of the hollow grouting anchor cable 1 is positioned at the part between the stable rock stratum and the soft top plate, and the rock stratum of the area where the grouting section 3 is positioned is filled with grouting materials 9. Through adding grouting material 9 between stable stratum and soft roof, not only can utilize grouting material 9 to strengthen the bonding strength of soft roof part self, simultaneously, can carry out effectual bonding with soft roof and stable stratum, in addition, can also utilize cavity slip casting anchor rope 1 to further strengthen the joint strength between soft roof and the stable stratum to can multiple improvement to the supporting effect of soft roof.
In the supporting process, the corresponding hollow grouting anchor cable 1 is fully pre-tightened by using the anchor cable lockset 4, and then the top plate is grouting reinforced by using the grouting section 3.
Preferably, the grouting material 9 is cement slurry, chemical slurry or other slurry suitable for reinforcing coal mine tunnels.
Preferably, the length of the hollow grouting anchor cable 1 is 3-15 m.
Preferably, the distance between the anchor cable installation hole 7 and the adjacent roadway side part is 200-2000 mm.
The steel belt 6 is an M-shaped steel belt or a W-shaped steel belt or a T-shaped steel belt or an H-shaped steel belt or a steel belt made of I-steel or a steel belt made of channel steel.
According to the utility model, the anchoring sections of the pair of hollow grouting anchor cables are anchored in the stable rock stratum in a relatively inclined manner, and the anchoring sections are fixedly connected with the rock stratum in the region through the anchoring agent, so that stable and reliable force supporting points can be provided for the hollow grouting anchor cables, and the hollow grouting anchor cables can have more stable bearing capacity in the subsequent supporting process. Steel strips are arranged at the roadway roof, two hollow grouting anchor cables penetrate through a pair of anchor cable mounting holes at two ends of the steel strips, and then the two hollow grouting anchor cables are connected by utilizing anchor cable trusses which are arranged below the steel strips in parallel and matched with anchor cable locks, so that the application angle of the prestress of the hollow grouting anchor cables can be changed by utilizing the anchor cable mounting holes and the anchor cable trusses on the steel strips, and therefore, the steel strips can obtain certain prestress in the horizontal direction and the vertical direction, and then the hollow grouting anchor cables can be matched for effectively anchoring the broken soft roof, and the problem of anchor cable support design of the broken soft roof is solved. The grouting core pipe in the hollow grouting anchor cable extends out of the steel belt from the anchor cable mounting hole at the corresponding side, grouting materials can be conveniently injected into the grouting section of the hollow grouting anchor cable by using the grouting core pipe, so that the anchoring strength of the anchor cable to the top plate can be further enhanced by the grouting materials after the supporting is finished, and compared with a structure in the prior art that the supporting capability can be remarkably improved by only supporting the anchor cable.
According to the utility model, the anchor cable lockset, the anchor cable truss, the steel belt and the hollow grouting anchor cable are combined to form the combined supporting structure, the hollow grouting anchor cable and the steel belt are applied with pretightening force to change the hollow grouting anchor cable and the steel belt into an active stress system, so that the hollow grouting anchor cable and the steel belt become the first step of effectively controlling and preventing deformation and displacement of a broken soft top plate, meanwhile, the supporting capability is further improved by utilizing the grouting core pipe in a grouting mode after the combined supporting structure is formed, the integral stability of the top plate of the roadway is obviously improved, the control effect of the top plate of the broken roadway is effectively improved, meanwhile, the plate integrity and the stability of the top plate of the broken roadway are enhanced, the surrounding rock safety coefficient of the top plate of the broken roadway is improved, the construction difficulty and the supporting cost are reduced, and the requirement of controlling and supporting the top plate of the broken roadway is fully met.
Claims (7)
1. The roof hollow grouting anchor cable truss supporting structure comprises a steel belt (6), an anchor cable truss (5) and two hollow grouting anchor cables (1), and is characterized in that;
the length of the steel belt (6) is matched with the width of the roadway top plate, the steel belt is tightly paved on the lower surface of the roadway top plate in a manner of being perpendicular to the trend of the roadway, and a pair of anchor cable mounting holes (7) are correspondingly formed at two end parts of the steel belt;
the anchor cable truss (5) and the steel belt (6) are arranged on the lower surface of the steel belt (6) in parallel and are positioned in the area between the pair of anchor cable mounting holes (7);
the anchoring sections (2) of the two hollow grouting anchor cables (1) respectively penetrate through a pair of anchor cable mounting holes (7) and are anchored in deep stable rock strata on two sides of a roadway roof in a relatively tilting mode; the tail parts of the two hollow grouting anchor cables (1) reversely and alternately pass through the anchor cable truss (5) and are respectively fixedly connected with the two anchor cable locks (4); the grouting core pipe (8) in each hollow grouting anchor cable (1) extends out of the steel belt (6) from the anchor cable mounting hole (7) at the corresponding side;
the anchor cable lockset (4) is used for providing pretightening force for the hollow grouting anchor cable (1) by matching with the anchor cable truss (5) and compacting the steel belt (6) on the roadway roof.
2. The roof hollow grouting anchor cable truss support structure according to claim 1, wherein the included angle between the direction in which the hollow grouting anchor cable (1) is driven into the tunnel roof and the vertical plane is 8-90 degrees.
3. The roof hollow grouting anchor cable truss support structure according to claim 1 or 2, wherein the grouting section (3) of the hollow grouting anchor cable (1) is positioned at a part between a stable rock stratum and a soft roof, and the rock stratum of the area where the grouting section (3) is positioned is filled with grouting materials (9).
4. A roof hollow grouting anchor cable truss support structure according to claim 3, characterized in that the grouting material (9) is cement slurry, chemical slurry or slurry suitable for reinforcement of coal mine roadways.
5. The roof hollow grouting anchor cable truss support structure according to claim 4, wherein the length of the hollow grouting anchor cable (1) is 3-15 m.
6. The roof hollow grouting anchor cable truss support structure according to claim 1, wherein the distance between the anchor cable installation holes (7) and the adjacent roadway side is 200-2000 mm.
7. A roof hollow grouting anchor line truss support structure according to claim 1, characterized in that the steel strip (6) is an M-type steel strip or a W-type steel strip or a T-type steel strip or an H-type steel strip or a steel strip made of i-steel or a steel strip made of channel steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987233.XU CN219733432U (en) | 2023-04-27 | 2023-04-27 | Roof cavity slip casting anchor rope truss supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987233.XU CN219733432U (en) | 2023-04-27 | 2023-04-27 | Roof cavity slip casting anchor rope truss supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219733432U true CN219733432U (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320987233.XU Active CN219733432U (en) | 2023-04-27 | 2023-04-27 | Roof cavity slip casting anchor rope truss supporting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219733432U (en) |
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2023
- 2023-04-27 CN CN202320987233.XU patent/CN219733432U/en active Active
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