CN220791239U - Coal mine tunnel ledge supporting structure - Google Patents
Coal mine tunnel ledge supporting structure Download PDFInfo
- Publication number
- CN220791239U CN220791239U CN202322754567.5U CN202322754567U CN220791239U CN 220791239 U CN220791239 U CN 220791239U CN 202322754567 U CN202322754567 U CN 202322754567U CN 220791239 U CN220791239 U CN 220791239U
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- cantilever
- roadway
- piles
- ledge
- coal mine
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 210000000051 wattle Anatomy 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a coal mine roadway ledge supporting structure, and belongs to the technical field of coal mine supporting; solves the problem that the existing supporting structure is unstable and has the risk of collapse of broken surrounding rock bands; the supporting structure is characterized in that a plurality of cantilever piles are sequentially arranged on a broken roadway side part, a truss is connected between two adjacent cantilever piles, two ends of the truss are respectively pressed on the left cantilever pile and the right cantilever pile, and the truss is fixedly connected with the cantilever piles and the roadway side part through a plurality of driven anchor rod ropes; a steel belt is arranged between two adjacent cantilever piles and is fixedly connected with the roadway side part through an anchor rod cable; according to the utility model, the cantilever piles are arranged on the broken roadway side to form stable support for the roadway side structure, and the complete support structure is formed by the anchor rod ropes and the steel belts of the side, so that the truss anchor rod ropes and the cantilever piles together support the side to break surrounding rock.
Description
Technical Field
The utility model belongs to the technical field of coal mine support, and particularly relates to a coal mine roadway ledge support structure.
Background
After the ore bed is mined out, the roof strata of the goaf is suspended, the pressure of the roof strata is transferred to the coal wall, the pressure born by the coal wall is increased to form a pressurizing area, and part of coal is crushed and extruded to the goaf under the action of additional load, and the phenomenon is called ledge. The supporting pressure in front of the working face is a main reason for the generation of coal wall caving, and different coal seam conditions, including hardness, joint fracture development degree and geological structure development condition, lead to different working face coal wall caving forms. Some working surfaces are not ledge-splitted, and some working surfaces are ledge-splitted seriously. Because the lateral pressure of two sides of the roadway is large, the leg of the bracket is crushed, if the bracket is not processed in time, the sides can be sliced; if the coal and rock on the two sides of the roadway are loose and soft, the back sides of the support are not tight, and water on the sides is sprayed, the sides can be sliced. Along with the continuous development of the ledge, the cross section of the roadway is wider, and the pressure is larger and larger until the whole roadway collapses. Therefore, the roadway panel must be repaired in time.
The existing processes of the ledge are divided into two types, one is a ledge on one side of a roadway, but the ledge does not fall off, and the leg is crushed, namely broken or folded. At this time, a prop can be arranged below the top beam to support the top beam, the broken prop leg is taken off, coal gangue is cleaned, the prop nest is dug, and a new prop leg is replaced. If the side empty roof of the caving side is too large after the gangue is cleaned, a simple wood pile can be made by using old materials, the support is backed by using the back plate and the wattle piece to prevent continuous collapse, and finally, the top column is removed, thus the maintenance is finished. The other is that the side wall of the roadway is serious, and the roadway is treated by a collision wedge: the surrounding rock of the roadway is particularly soft, the top plate is damaged, if the crushed column leg is removed, coal gangue flows out, the sheet is continuously developed and enlarged, and the roof is easy to fall. At this point, the ledge area is passed by way of a ledge strike. The method is to select a better column leg outside the lasting area, strike a wedge from the column leg and cross the wedge obliquely. The length of the collision wedge is preferably 1.2m to 1.5m, after collides with the wedge, the top beam is supported on the lower support, the broken column leg is removed, a new column leg is replaced, the top wall is carried, and the support is orderly trimmed. However, the existing methods have certain defects that the supporting structure is unstable, and the broken surrounding rock belt still has the risk of slumping.
Disclosure of utility model
The utility model overcomes the defects of the prior art, provides a coal mine roadway ledge supporting structure, and solves the problems that the existing supporting structure is unstable and the collapse risk of broken surrounding rock strips exists.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme.
A coal mine roadway ledge supporting structure comprises cantilever piles, steel belts, trusses and anchor ropes; a plurality of cantilever piles are sequentially arranged on the broken roadway side part, the distance C between two adjacent cantilever piles is less than or equal to 3A, and A is the width of a roadway crack zone; connecting trusses between two adjacent cantilever piles, respectively pressing two ends of each truss on the left cantilever pile and the right cantilever pile, and connecting and fixing the trusses with the cantilever piles and the roadway side parts through a plurality of driven anchor rods; the distance between two adjacent anchor rods connected to the truss is less than or equal to 3d, and d is the diameter of a broken block in the roadway side part; and steel belts are arranged between two adjacent cantilever piles and fixedly connected with the roadway side parts through anchor rod ropes.
Further, the anchoring depth of the anchor rod rope is more than 1.2L, wherein L is the thickness of the broken coal rock of the upper part.
Further, the number of the steel belts arranged between two adjacent cantilever piles is more than or equal to 2.
Furthermore, a plurality of anchor rods are uniformly connected on the steel belt along the length direction.
Furthermore, the cantilever pile is prepared by arranging a cantilever pile groove at the roadway side part, then bundling reinforcing steel bars in the pile groove for supporting a mould, and pouring concrete.
Further, the steel belt is arranged along the length direction of the cantilever pile.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model can play a good role in supporting the maintenance of underground permanent and semi-permanent roadways. The cantilever pile groove is cut on the broken roadway side, the reinforcing steel bar formwork is pricked in the pile groove, and concrete is poured to form a cantilever pile structure, so that stable support can be formed on the roadway side structure. On the basis, through repairing and beating the anchor rod rope and the steel belt at the upper part, the cantilever pile and the broken coal rock on the surface of the upper part can be effectively integrally supported, and a complete supporting structure is formed. And the truss anchor rope is constructed on the cantilever pile, the anchor rope is constructed on the cantilever pile, and the anchor rope is constructed to break surrounding rock bands with the upper part, so that the aim of supporting the upper part together with the cantilever pile to break the surrounding rock is fulfilled.
Drawings
FIG. 1 is a schematic view of a coal mine roadway ledge support structure according to the present utility model;
Fig. 2 is a front view of the coal mine roadway ledge supporting structure.
In the figure: 1-cantilever pile, 2-steel belt, 3-truss, 4-anchor rope, 5-tunnel upper part and 6-deep complete coal rock.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. The following describes the technical scheme of the present utility model in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Referring to fig. 1 and 2, the embodiment provides a coal mine roadway ledge supporting structure, which comprises cantilever piles 1, steel belts 2, trusses 3 and anchor ropes 4; a plurality of cantilever piles 1 are sequentially arranged on a broken roadway side part 5 (namely, a broken coal rock layer on the surface of the side part), and a deep complete coal rock 6 is arranged at the rear part of the roadway side part 5.
The distance C between two adjacent cantilever piles 1 is less than or equal to 3A, and A is the width of a roadway crack zone; a truss 3 is connected between two adjacent cantilever piles 1, two ends of the truss 3 are respectively pressed on the left cantilever pile 1 and the right cantilever pile 1, and the truss 3 is fixedly connected with the cantilever piles 1 and the roadway side part 5 through a plurality of driven anchor rods 4; the distance between two adjacent anchor rod ropes 4 connected to the truss 3 is less than or equal to 3d, and d is the diameter of a broken block in the roadway side part 5; a steel strip 2 is arranged between two adjacent cantilever piles 1, the steel strip 2 being arranged along the length direction of the cantilever piles 1. The steel belt 2 is uniformly connected with a plurality of anchor rods 4 along the length direction, and the steel belt 2 is fixedly connected with the roadway side part 5 through the anchor rods 4.
Specifically, the anchoring depth of all the anchor rod ropes 4 is more than 1.2L, wherein L is the thickness of the broken coal rock of the upper part.
Specifically, the number of the steel strips 2 arranged between two adjacent cantilever piles 1 is more than or equal to 2.
The cantilever pile 1 is prepared by arranging a cantilever pile groove in a roadway side part 5, then bundling reinforcing steel bars in the pile groove for supporting a mould, and pouring concrete.
According to the supporting structure, the cantilever pile grooves are cut in the broken roadway side parts, the steel bar formwork is pricked in the pile grooves, and concrete is poured to form the cantilever pile structure, so that stable supporting can be formed on the roadway side part structure. On the basis, through repairing and beating the anchor rod rope and the steel belt at the upper part, the cantilever pile and the broken coal rock on the surface of the upper part can be effectively integrally supported, and a complete supporting structure is formed. And the truss anchor rope is constructed on the cantilever pile, the anchor rope is constructed on the cantilever pile, and the anchor rope is constructed to break surrounding rock bands with the upper part, so that the aim of supporting the upper part together with the cantilever pile to break the surrounding rock is fulfilled.
While the utility model has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the utility model pertains without departing from the scope of the utility model defined by the appended claims.
Claims (6)
1. The coal mine roadway ledge supporting structure is characterized by comprising cantilever piles (1), steel belts (2), trusses (3) and anchor rods (4); a plurality of cantilever piles (1) are sequentially arranged on a broken roadway side part (5), the distance C between two adjacent cantilever piles (1) is less than or equal to 3A, and A is the width of a roadway crack zone; a truss (3) is connected between two adjacent cantilever piles (1), two ends of the truss (3) are respectively pressed on the left cantilever pile (1) and the right cantilever pile (1), and the truss (3) is connected and fixed with the cantilever piles (1) and the roadway side part (5) through a plurality of driven anchor rods (4); the distance between two adjacent anchor rod ropes (4) connected to the truss (3) is less than or equal to 3d, and d is the diameter of a broken block in the roadway side part (5); a steel belt (2) is arranged between two adjacent cantilever piles (1), and the steel belt (2) is fixedly connected with a roadway side part (5) through an anchor rod rope (4).
2. The coal mine roadway ledge support structure of claim 1, wherein the anchoring depth of the anchor rod rope (4) is more than 1.2L, and L is the thickness of the ledge broken coal rock.
3. The coal mine roadway ledge supporting structure according to claim 1, wherein the number of steel belts (2) arranged between two adjacent cantilever piles (1) is more than or equal to 2.
4. The coal mine roadway ledge supporting structure according to claim 2 is characterized in that a plurality of anchor rods (4) are uniformly connected to the steel belt (2) along the length direction.
5. The coal mine roadway ledge supporting structure according to claim 1, wherein the cantilever piles (1) are prepared by arranging cantilever pile grooves in roadway ledge parts (5), bundling reinforcing steel bars in the pile grooves for supporting forms, and pouring concrete.
6. The coal mine roadway ledge supporting structure according to claim 1, wherein the steel belts (2) are arranged along the length direction of the cantilever piles (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322754567.5U CN220791239U (en) | 2023-10-13 | 2023-10-13 | Coal mine tunnel ledge supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322754567.5U CN220791239U (en) | 2023-10-13 | 2023-10-13 | Coal mine tunnel ledge supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220791239U true CN220791239U (en) | 2024-04-16 |
Family
ID=90663603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322754567.5U Active CN220791239U (en) | 2023-10-13 | 2023-10-13 | Coal mine tunnel ledge supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220791239U (en) |
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2023
- 2023-10-13 CN CN202322754567.5U patent/CN220791239U/en active Active
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