CN212376670U - Broken roof supporting device of underground mine - Google Patents
Broken roof supporting device of underground mine Download PDFInfo
- Publication number
- CN212376670U CN212376670U CN202020952997.1U CN202020952997U CN212376670U CN 212376670 U CN212376670 U CN 212376670U CN 202020952997 U CN202020952997 U CN 202020952997U CN 212376670 U CN212376670 U CN 212376670U
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- anchor cable
- anchor
- concrete
- long
- anchor rod
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Abstract
The utility model relates to an underground mine broken roof supporting device, which comprises a concrete guniting layer sprayed on the surface of a broken roof and a reinforcing mesh fixed on the surface of the concrete guniting layer; the concrete grouting layer is arranged on the wall of the surrounding rock, and the reinforcing mesh is arranged on the wall of the surrounding rock; the lower end part of the anchor cable hole is sequentially provided with a pipe seam type anchor rod, an anchor rod tray and a grout stopping plug from top to bottom; the long anchor cable penetrates through the centers of the pipe seam type anchor rod, the anchor rod tray and the grout stop plug, and the lower end of the long anchor cable is connected with I-shaped steel. The problem of slurry leakage in the grouting process is solved, and the support firmness and safety are further improved.
Description
Technical Field
The utility model relates to an underground mine roof supporting device. The method is mainly used for supporting the broken roof of the underground mine.
Background
In the underground mine exploitation and quasi-engineering construction, a broken top plate is often encountered. In order to ensure the safety of the construction of the roadway engineering, roof support is required. The existing supporting device mainly comprises an anchor rod active supporting device, a U-shaped steel support passive supporting device and an anchor cable supporting device.
The strength of the pure anchor rod active support is insufficient, and the U-shaped steel support passive support cannot limit the top plate to collapse, so that the safety and the reliability of the two support modes cannot be guaranteed, and the top plate in a broken area is usually recommended to be supported by an anchor rope. In the anchor cable support, the fact that the integrity of the surface layer of the surrounding rock is seriously damaged in a certain range due to the fact that the top plate of the broken area is damaged by multiple actions such as stress, gravity, anchor rod support and the like is found, the surface layer of the surrounding rock is seriously damaged, slurry leakage is serious when the conventional anchor cable grouting method is used, the grouting efficiency is extremely low, and the grouting effect cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a broken roof supporting device in underground mine is provided to solve and run the hourglass thick liquid problem, and further improve and strut fastness and security.
The technical scheme of the utility model as follows:
a supporting device for a broken top plate of an underground mine is characterized by comprising a concrete guniting layer sprayed on the surface of the broken top plate and a reinforcing mesh fixed on the surface of the concrete guniting layer; the concrete grouting layer is arranged on the wall of the surrounding rock, and the reinforcing mesh is arranged on the wall of the surrounding rock; the lower end part of the anchor cable hole is sequentially provided with a pipe seam type anchor rod, an anchor rod tray and a grout stopping plug from top to bottom; the long anchor cable penetrates through the centers of the pipe seam type anchor rod, the anchor rod tray and the grout stop plug, and the lower end of the long anchor cable is connected with I-shaped steel; the upper side edge of the I-shaped steel is abutted against the lower surface of the anchor rod tray.
One I-shaped steel corresponds to a row of a plurality of anchor cable holes and is connected with all the long anchor cables in the row of anchor cable holes; the upper side edge of the I-shaped steel is abutted against the lower surfaces of all the anchor rod trays.
The middle part of the I-shaped steel is provided with a longitudinal through hole, the long anchor cable penetrates through the through hole, and the long anchor cable is connected with the I-shaped steel through the anchor cable fixing piece.
The thickness of the concrete guniting layer is not less than 3 cm.
The utility model has the advantages of:
1. the supporting effect is good. The method adopts guniting to seal firstly, pre-reinforces the anchor rod and the anchor net, supports after the anchor rope to ensure that the support strength of the broken roof is high, and ensures the support effect.
2. The construction safety is high. Multiple supporting of the broken top plate is all carried out on the basis of pre-supporting, and the operation safety is higher during construction of the anchor rod and the anchor cable.
3. The supporting strength is high. The full-length anchoring is carried out on the surface surrounding rock by adopting a pipe seam type anchor rod, and the damage and the movement of the surrounding rock are limited by matching with a high-strength steel netting; the anchor cable is adopted to anchor the 'deep' surrounding rock in full length, and the I-shaped steel is matched to perform secondary reinforcement on the top plate, so that excessive deformation of the surrounding rock is limited, and high strength of top plate support is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1-surrounding rock; 2-grouting a material layer; 3, a long anchor cable; 4-concrete guniting layer; 5, a pipe seam type anchor rod; 6-reinforcing mesh; 7-anchor rod tray; 8-I-steel; 9-anchor cable fixing parts; 10-stop plug; and 11, crushing the top plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1, the embodiment of the present invention includes spraying on the concrete guniting layer 4 on the surface of the broken roof 11 and the reinforcing mesh 6 fixed on the surface of the concrete guniting layer 4, and further includes an anchor cable hole vertically running through the inside of the surrounding rock 1, the concrete guniting layer 4 and the reinforcing mesh 6, a long anchor cable 3 is installed in the anchor cable hole, and a grouting material layer 2 is provided between the anchor cable hole wall and the long anchor cable 3. The lower end part of the anchor cable hole is sequentially provided with a pipe seam type anchor rod 5, an anchor rod tray 7 and a grout stop plug 10 from top to bottom. The grout stop plug 10 adopts a hollow rubber plug. The long anchor cable 3 penetrates through the center positions of the pipe seam type anchor rod 5, the anchor rod tray 7 and the grout stop plug 10, and the lower end of the long anchor cable is connected with an I-shaped steel 8. The upper side edge of the I-shaped steel 8 is abutted against the lower surface of the anchor rod tray 7.
One I-steel 8 corresponds to a row of a plurality of anchor cable holes and is connected with all the long anchor cables 3 in the row of anchor cable holes; the upper side edge of the I-shaped steel 8 is abutted against the lower surfaces of all the anchor rod trays 7.
The connection mode between the I-shaped steel 8 and the long anchor cable 3 is as follows: the middle part of the I-shaped steel 8 is provided with a longitudinal through hole, the long anchor cable 3 penetrates through the through hole, and the long anchor cable 3 is connected with the I-shaped steel 8 through an anchor cable fixing part 9 (such as a fastening nut).
The following is the construction the embodiment of the utility model discloses the concrete step:
1) after the operation surface is blasted, the pumice on the surface of the broken top plate 11 is cleaned, the surface of the broken top plate 11 is washed, and dust is cleaned;
2) then, spraying and sealing the top plate of the working face by adopting C20 concrete to form a concrete spraying layer 4, wherein the thickness of the concrete spraying layer 4 is not less than 3 cm;
3) after the guniting is finished, constructing a phi 28mm anchor cable hole into the surrounding rock 1 according to the design by adopting a special anchor cable drilling machine;
4) after anchor rope hole construction, adopt roofbolter to carry out reaming, reaming size to the anchor rope hole of having under construction immediately: phi is 40mm, and the length is 2.0 m;
5) after reaming, firstly, laying a reinforcing mesh 6 (high-strength steel woven mesh) on the surface of the concrete guniting layer 4, wherein the diameter of the reinforcing steel bar is 6mm, and the specification of the reinforcing mesh is 3m x 1.2 m; then installing MF40/1800 type seam type anchor rods 5 for fixing;
6) after the pipe seam type anchor rod 5 is installed, a long anchor cable 3 and a grout stop plug 10 are sequentially installed, and full-length grouting is carried out on anchor cable holes to form a grouting material layer 2; the long anchor cable 3 is a grouting anchor cable;
7) and after the grouting slurry is completely cured, tensioning the long anchor cable 3, sleeving the outer end of the long anchor cable 3 with the I-shaped steel 8, and connecting the long anchor cable 3 and the I-shaped steel 8 through an anchor cable fixing piece 9.
The method for supporting the broken top plate of the underground mine realizes high-strength and high-safety supporting of the broken top plate by adopting a multiple reinforcing supporting method.
Claims (5)
1. The support device for the broken top plate of the underground mine is characterized by comprising a concrete guniting layer (4) sprayed on the surface of the broken top plate (11) and a reinforcing mesh (6) fixed on the surface of the concrete guniting layer (4); the concrete grouting material is characterized by also comprising anchor cable holes longitudinally penetrating through the inside of the surrounding rock (1), the concrete grouting layer (4) and the reinforcing mesh (6), wherein long anchor cables (3) are installed in the anchor cable holes, and a grouting material layer (2) is arranged between the wall of each anchor cable hole and each long anchor cable (3); the lower end part of the anchor cable hole is sequentially provided with a pipe seam type anchor rod (5), an anchor rod tray (7) and a grout stop plug (10) from top to bottom; the long anchor cable (3) penetrates through the centers of the pipe seam type anchor rod (5), the anchor rod tray (7) and the grout stop plug (10), and the lower end of the long anchor cable is connected with an I-shaped steel (8); the upper side edge of the I-shaped steel (8) is abutted against the lower surface of the anchor rod tray (7).
2. An underground mine crushing roof support device according to claim 1, characterized in that one i-steel (8) corresponds to a row of several anchor cable holes and is connected with all the long anchor cables (3) of the row of anchor cable holes; the upper side edge of the I-shaped steel (8) is propped against the lower surfaces of all the anchor rod trays (7).
3. The underground mine crushed roof support device according to claim 1 or 2, characterized in that a longitudinal through hole is opened in the middle of the i-beam (8) and the long anchor cable (3) passes through the through hole, and the long anchor cable (3) is connected with the i-beam (8) through the anchor cable fixing member (9).
4. An underground mine broken roof support apparatus according to claim 1 or claim 2, characterised in that the thickness of the concrete shotcrete layer (4) is not less than 3 cm.
5. An underground mine crushing roof support apparatus according to claim 3, characterised in that the thickness of the concrete shotcrete layer (4) is not less than 3 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020952997.1U CN212376670U (en) | 2020-05-30 | 2020-05-30 | Broken roof supporting device of underground mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020952997.1U CN212376670U (en) | 2020-05-30 | 2020-05-30 | Broken roof supporting device of underground mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212376670U true CN212376670U (en) | 2021-01-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020952997.1U Expired - Fee Related CN212376670U (en) | 2020-05-30 | 2020-05-30 | Broken roof supporting device of underground mine |
Country Status (1)
| Country | Link |
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| CN (1) | CN212376670U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542146A (en) * | 2022-03-29 | 2022-05-27 | 嵩县金牛有限责任公司 | Top plate protection method for underground blasting of mine |
-
2020
- 2020-05-30 CN CN202020952997.1U patent/CN212376670U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542146A (en) * | 2022-03-29 | 2022-05-27 | 嵩县金牛有限责任公司 | Top plate protection method for underground blasting of mine |
| CN114542146B (en) * | 2022-03-29 | 2024-04-26 | 嵩县金牛有限责任公司 | Roof protection method for underground mine blasting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210119 Termination date: 20210530 |