CN209855832U - Self-rotating anchoring pipe - Google Patents
Self-rotating anchoring pipe Download PDFInfo
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- CN209855832U CN209855832U CN201822059485.8U CN201822059485U CN209855832U CN 209855832 U CN209855832 U CN 209855832U CN 201822059485 U CN201822059485 U CN 201822059485U CN 209855832 U CN209855832 U CN 209855832U
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- pipe
- anchor
- steel pipe
- grouting
- tensioning
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Abstract
The utility model relates to a self-rotating anchor pipe, which comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe, one end of the steel pipe is provided with a longitudinal crack, the other end of the steel pipe is provided with a reducing sleeve head, a tray, a check ring, a rubber grout stop plug and an anchoring rotary wire are sequentially arranged between the reducing sleeve head and the longitudinal crack, the check ring is welded on the steel pipe and is 200-400 mm away from the reducing sleeve head, the rubber grout stop plug is tightly close to the check ring, and the anchoring rotary wire is welded on the steel pipe body; the inner injection tensioning sleeve comprises an inner injection tensioning pipe penetrating through the steel pipe, one end of the inner injection tensioning pipe, which is close to the longitudinal crack, is welded with a cone, and the other end of the inner injection tensioning pipe is provided with a primary anchor nut outside the reducing sleeve head. The self-rotating anchor grouting pipe has the advantages that the diffusion radius can be improved, the anchor pipe supporting performance is improved, grouting is reliable, and construction is convenient.
Description
Technical Field
The utility model relates to a spin anchor pipe.
Background
In recent years, along with the increasing of mining scale, the mining depth is increased year by year, the coal mining depth is increased at the speed of 8-12 m/year per year, the east mine is developing at the speed of 10-25 m/year per year, the pressure of surrounding rocks of a coal mine tunnel is also increased more and more, particularly, a deep tunnel is located in unstable rock bodies such as mining influences, weak rock layers and broken zones, the surrounding rocks of the tunnel develop on a weak surface, the stability of the surrounding rocks of the tunnel is poor, and great difficulty is brought to the control and maintenance of the surrounding rocks of the tunnel. Under the complicated and difficult conditions, the conventional anchor rods/anchor cables or shed frames are adopted for supporting, the requirement of controlling the surrounding rock of the roadway cannot be met, the roadway is seriously deformed and damaged, and the maintenance cost is high.
The high-strength anchoring and grouting support technology is a new roadway support technology developed in recent years under complex and difficult conditions, and adopts high-strength hollow anchor pipes, high-strength shrinkage-resistant grouting materials and high grouting pressure to anchor and reinforce large-range surrounding rocks, namely a so-called 'three-high-one-large' anchoring and grouting system. The hollow anchor pipe adopts a one-step forming technology, can immediately bear load after being installed, and has the support timeliness; the anchor pipe is stretched manually, can apply high pretightening force, and has supporting initiative; after grouting, the end anchor is changed into the full anchor, and meanwhile, the surrounding rock is reinforced by the diffusion of grouting materials, so that the integrity and the bearing capacity of the surrounding rock are improved, and the characteristics have very obvious effect in roadway support under complicated and difficult conditions.
The basic theory of modern rock mechanics shows that the core and key of the roadway surrounding rock control technology is to maintain and improve the surrounding rock strength by adopting engineering means and to fully utilize the strength of the surrounding rock to maintain the stability of a surrounding rock supporting system. The anchor grouting support technology can reinforce or modify rock soil in situ by improving physical and mechanical properties of broken surrounding rock, so that rock soil bodies in a certain range become an integral part of an engineering structure, further the strength of the surrounding rock of a rock body is improved, the deformation of the surrounding rock is effectively controlled by means of exerting the self bearing capacity of the surrounding rock and the like, further the roadway support effect is obviously improved, and the problems of stability and safety of some troublesome geotechnical engineering are solved more perfectly
A roadway surrounding rock control technology with great potential not only accords with the roadway surrounding rock control theory under modern complex conditions, but also proves that the technology has great superiority in technical economy as a result of practice, and becomes a leading-edge theoretical technology in the mining boundary at home and abroad.
In China, the roadway is reinforced by adopting the anchor-grouting support in the coal mine from the eighties of the last century, for example, the soft rock is treated by adopting the combination of grouting reinforcement and anchor-grouting support in the Shandong Longkou mining area, and the roadway is successfully maintained by applying the anchor-grouting support technology to the Xuzhou Qishan mine. In recent years, anchor grouting support and grouting reinforcement technologies are rapidly developed in deep well tunnels and soft rock tunnels. If the concept of 'grouting after repair and not grouting after repair' is proposed in the Huainan mining area, the roadway is repaired by using the anchor grouting support, corresponding grouting reinforcement construction specifications and acceptance standards are formulated, the anchor grouting support is actively popularized to a newly excavated main roadway and a coal roadway, and good technical and economic benefits are obtained by popularizing and applying the anchor grouting support if gob-side excavation is carried out and gob-side entry retaining is carried out. In other deep well mining areas in China, such as mining areas in Xinwen, iron method, Crane hillock, Huaibei and the like, anchor grouting and supporting are also actively tested and popularized to replace shed supporting, high-performance anchor grouting and supporting materials and matched construction machines are continuously researched and developed, high-strength and large-diameter grouting anchor rods, grouting anchor cables, high-pressure grouting pumps, floor drilling machines and the like are developed, and the anchor grouting and supporting technology is continuously improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a self-rotating anchor pipe, which comprises an anchor pipe body and an inner injection tensioning external member; the anchor pipe body comprises a steel pipe 11, one end of the steel pipe 11 is provided with a longitudinal crack 12, the other end of the steel pipe is provided with a reducing sleeve head 13, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal crack 12, the check ring 15 is welded on the steel pipe 11 and is 13200-400 mm away from the reducing sleeve head, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 penetrating through the steel pipe 11, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13.
The self-rotating anchor injection pipe construction process comprises the following steps: 1. drilling a hole perpendicular to the rock surface, and drilling the hole by using a drill bit with the diameter of 42-45 mm; 2. rotationally mounting the self-rotating anchoring pipe on the tray 14 to be tightly attached to the rock surface; 3. rotating the inner screwed pipe, and initially anchoring the self-rotating anchor pipe; 4. preparing slurry, adding water and the grouting material according to the use instruction of a special stirring barrel by adopting special expansive penetrating fluid for grouting, and stirring for later use; 5. linking the grouting nozzle and grouting under the condition that the sealing is ensured by the linking inspection rubber grout stop plug 16; 6. and (4) suspending grouting after the grouting slurry leaks out, waiting for one minute, and then supplementing the slurry, and repeating the steps until the grouting pressure reaches 1 Mpa.
In one embodiment of the present invention, the inner tensioning tube 21 has a bore diameter of T4-phi 8.
In one embodiment of the present invention, the outer diameter of the retainer ring 15 is phi 40.
In an embodiment of the present invention, the number of the longitudinal cracks 12 is 2 to 6.
In one embodiment of the present invention, the rubber grout stopper 16 is an ellipsoid of 48mm × 30 mm.
Adopt the technical scheme of the utility model, there is following profitable technological effect:
(1) water resistance, corrosion resistance and service life prolongation;
by adopting the high-strength anticorrosion self-rotation anchor-grouting pipe support, the slurry can be used for plugging the cracks of the surrounding rock, isolating air and preventing the surrounding rock from weathering, and the surrounding rock can be prevented from being wetted by water to reduce the strength of the surrounding rock, in addition, the full-length anchoring of the anchor pipe can be realized through grouting, and the continuous corrosion infringement of water and air to the anchor pipe is prevented.
(2) The strength of the surrounding rock is improved, and the self-bearing capacity of the surrounding rock of the roadway is enhanced;
after grouting, slurry glues the loose and broken roadway surrounding rock into a whole, so that the physical and mechanical properties of the rock, such as cohesion, internal friction angle, elastic modulus and the like, are improved, the overall strength of the roadway surrounding rock is further improved, and the surrounding rock is utilized as a part of a supporting structure; and the rock and the original rock form a whole, so that the roadway is kept stable and is not easy to damage.
(3) The wall rock is immediately loaded after being installed, so that deformation and damage of the wall rock are prevented;
after the supporting device is installed, the supporting device can bear a larger load action immediately under the condition of no grouting, so that active supporting is achieved, and deformation and damage of surrounding rocks of the roadway are limited.
(4) Grouting at high pressure to improve the diffusion radius;
the high-strength grouting anchor cable adopts high pre-tightening force for fastening and hole sealing, so that high-pressure grouting (7 MPa at most) can be realized, the slurry diffusion radius and the compaction effect on broken surrounding rocks are greatly improved, and the bearing capacity of the surrounding rocks is improved.
(5) The anchor pipe is anchored in full length, so that the supporting performance of the anchor pipe is improved;
by adopting a high-strength anchoring and grouting supporting form, the anchor pipe is changed into full-length anchoring from end anchoring, the slurry is solidified to meet the pre-tightening force requirement, the anchoring strength and the anchoring reliability are greatly improved, the load can be effectively transferred, the axial constraint and radial constraint effects of the supporting body are improved, and the unloading or shearing and breaking of the anchor pipe due to the influence of dynamic pressure are avoided.
(6) Grouting is reliable, and construction is convenient;
the high-strength anticorrosion self-rotating grouting anchor pipe is of a hollow structure, is provided with a core pipe, adopts reverse grouting during installation, eliminates the possibility of generating air pocket holes, ensures that grouting slurry is filled in drilled holes, saves a special joint for an exhaust pipe and the grouting pipe compared with the original grouting anchor rod, does not need to tie the grouting pipe, the exhaust pipe and block the grouting hole on site, and greatly simplifies the construction steps.
(7) Grouting is simple and convenient, the curing time of the slurry is adjustable, and the strength is high;
the pneumatic grouting system is adopted, safety and reliability are realized, construction is simple and convenient, the grouting material can be mud-based material or chemical-based material according to the field condition, the curing time of slurry can be adjusted according to the reinforcement requirements of different damage types of the roadway, and the cured strength is more than 55Mpa and higher than that of the original broken rock blocks.
Compared with the method that the anchor rod/anchor cable support is adopted, the anchor-grouting support not only strengthens surrounding rock through grouting, but also provides a reliable acting foundation for the anchor pipe; the support method has the advantages that the self strength of surrounding rock can be effectively improved, the support characteristic of a support body can be improved, the bearing capacity of the surrounding rock is obviously improved, the deformation of a roadway is obviously reduced, the support method is a very good active support form, has the characteristics of strong primary support, rapid resistance increase and high bearing, can well solve the problems of rapid attenuation and loss of anchoring force caused by loosening and crushing and large deformation of the surrounding rock of the roadway in a high stress area, a fault zone and a three-soft stratum, and has a good effect of anchoring and grouting the surrounding rock of the roadway in a stress concentration area with a large loosening range and a large loosening degree.
Test data show that the actual anchoring force of the anchor pipe can be improved by 1-3 times compared with that of a non-anchored anchor pipe under the same condition, and the severe deformation of a stress concentration area and surrounding rock of a three-soft stratum roadway with larger crushing and loosening range and degree can be effectively controlled, so that the application range of anchor pipe support is expanded, and the anchor pipe support has practical significance for solving the problem of supporting the stress concentration area and the surrounding rock of the three-soft stratum roadway.
From the comprehensive consideration of technology and economy, the high-strength anchor pipe has more obvious effect and obvious technical economy for supporting and reinforcing the coal mine soft rock tunnel, gob-side tunnel, dynamic pressure tunnel, deep tunnel, large-section chamber, intersection and other special conditions, and is an ideal novel supporting technology under complicated and difficult conditions.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
Spin anchor notes pipe, its characterized in that: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe 11, one end of the steel pipe 11 is provided with a longitudinal crack 12, the other end of the steel pipe is provided with a reducing sleeve head 13, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal crack 12, the check ring 15 is welded on the steel pipe 11 and is 13200-400 mm away from the reducing sleeve head, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 penetrating through the steel pipe 11, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13.
Example 2
Spin anchor notes pipe, its characterized in that: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe 11, wherein 2 longitudinal cracks 12 are uniformly arranged at one end of the steel pipe 11, a reducing sleeve head 13 is arranged at the other end of the steel pipe 11, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal cracks 12, the check ring 15 is welded on the steel pipe 11 and is 13200mm away from the reducing sleeve head, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 with the inner diameter phi 4 and penetrating through the steel pipe 11, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13.
Example 3
Spin anchor notes pipe, its characterized in that: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe 11, wherein 3 longitudinal cracks 12 are uniformly arranged at one end of the steel pipe 11, a reducing sleeve head 13 is arranged at the other end of the steel pipe 11, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal cracks 12, the check ring 15 is welded on the steel pipe 11 and is 13300mm away from the reducing sleeve head, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 with the inner diameter phi 6 and penetrating through the steel pipe 11, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13. The outer diameter of the retainer ring 15 is phi 40.
Example 4
Spin anchor notes pipe, its characterized in that: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe 11, wherein 4 longitudinal cracks 12 are uniformly arranged at one end of the steel pipe 11, a reducing sleeve head 13 is arranged at the other end of the steel pipe 11, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal cracks 12, the check ring 15 is welded on the steel pipe 11 and is 13400mm away from the reducing sleeve head, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 with the inner diameter phi 8 and penetrating through the steel pipe 11, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13. The rubber grout stop plug 16 is in an ellipsoidal shape with the diameter of 48mm multiplied by 30 mm.
Example 5
Spin anchor notes pipe, its characterized in that: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe 11, wherein 6 longitudinal cracks 12 are uniformly arranged at one end of the steel pipe 11, a reducing sleeve head 13 is arranged at the other end of the steel pipe 11, a tray 14, a check ring 15, a rubber grout stopping plug 16 and an anchoring rotary screw 17 are sequentially arranged between the reducing sleeve head 13 and the longitudinal cracks 12, the check ring 15 is welded on the steel pipe 11 and is spaced from the reducing sleeve head by 13260mm, the rubber grout stopping plug 16 is close to the check ring 15, and the anchoring rotary screw 17 is welded on the steel pipe 11; the internal injection tensioning external member comprises an internal injection tensioning pipe 21 which penetrates through the steel pipe 11 and has the inner diameter of phi 5, one end of the internal injection tensioning pipe 21, which is close to the longitudinal crack 12, is welded with a cone 22, and the other end of the internal injection tensioning pipe is provided with a primary anchor nut 23 on the outer side of the reducing sleeve head 13.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A spin anchor tube, characterized by: comprises an anchor pipe body and an internal injection tensioning external member; the anchor pipe body comprises a steel pipe (11), one end of the steel pipe (11) is provided with a longitudinal crack (12), the other end of the steel pipe is provided with a reducing sleeve head (13), a tray (14), a check ring (15), a rubber grout stopping plug (16) and an anchoring rotary screw (17) are sequentially arranged between the reducing sleeve head (13) and the longitudinal crack (12), the check ring (15) is welded on the steel pipe (11) and is 200-400 mm away from the reducing sleeve head (13), the rubber grout stopping plug (16) is close to the check ring (15), and the anchoring rotary screw (17) is welded on the steel pipe body (11); interior notes stretch-draw external member is including interior stretch-draw pipe (21) that pass steel pipe (11), interior stretch-draw pipe (21) are close to longitudinal crack (12) one end welding centrum (22), and the other end is equipped with first anchor nut (23) in reducing pullover (13) outside.
2. A spin anchor tube according to claim 1, wherein: the aperture of the internal stretching tube (21) is phi 4-phi 8.
3. A spin anchor tube according to claim 1, wherein: the outer diameter of the retainer ring (15) is phi 40.
4. A spin anchor tube according to claim 1, wherein: the number of the longitudinal cracks (12) is 2-6.
5. A spin anchor tube according to claim 1, wherein: the rubber slurry stopper (16) is in an ellipsoid shape of 48mm multiplied by 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822059485.8U CN209855832U (en) | 2018-12-10 | 2018-12-10 | Self-rotating anchoring pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822059485.8U CN209855832U (en) | 2018-12-10 | 2018-12-10 | Self-rotating anchoring pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855832U true CN209855832U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822059485.8U Expired - Fee Related CN209855832U (en) | 2018-12-10 | 2018-12-10 | Self-rotating anchoring pipe |
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| Country | Link |
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| CN (1) | CN209855832U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519202A (en) * | 2018-12-10 | 2019-03-26 | 陕西蒲白矿山支护有限公司 | A kind of spin anchor note pipe |
| CN111173548A (en) * | 2020-01-20 | 2020-05-19 | 黑龙江工业学院 | Elastic spiral anchoring type roadway supporting method |
-
2018
- 2018-12-10 CN CN201822059485.8U patent/CN209855832U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519202A (en) * | 2018-12-10 | 2019-03-26 | 陕西蒲白矿山支护有限公司 | A kind of spin anchor note pipe |
| CN111173548A (en) * | 2020-01-20 | 2020-05-19 | 黑龙江工业学院 | Elastic spiral anchoring type roadway supporting method |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20191227 Termination date: 20211210 |