CN111156041A - Method for installing anchor cable through loosening and drilling - Google Patents
Method for installing anchor cable through loosening and drilling Download PDFInfo
- Publication number
- CN111156041A CN111156041A CN202010118083.XA CN202010118083A CN111156041A CN 111156041 A CN111156041 A CN 111156041A CN 202010118083 A CN202010118083 A CN 202010118083A CN 111156041 A CN111156041 A CN 111156041A
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- China
- Prior art keywords
- anchor cable
- pipe
- drilling
- wall
- hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an installation method of an anchor cable through a loose drill hole, which comprises the following steps: when the drilled hole passes through the broken rock mass, the drill rod is withdrawn, and the large-diameter drill bit is replaced to sleeve the casing pipe on the outer part of the drill rod; drilling the drill rod into the anchor cable hole again, drilling the drill bit forwards to form a drilling hole expansion section, pushing the wall protection pipe while drilling the drill bit, fixing the wall protection pipe on the drilling hole expansion section, and correspondingly lengthening the wall protection pipe when each drill rod is lengthened; when the drill bit passes through the broken layer, replacing the conventional anchor cable drill bit, and continuously drilling the rest anchor cable holes; after the drilling is finished, the drill rod is withdrawn, a section of installation pipe is pushed into the drilling hole, and the installation pipe penetrates into one end of the wall protection pipe and penetrates out of the other end of the wall protection pipe; sequentially pushing the anchoring agent and the anchor cable into the installation pipe, and delivering the anchoring agent to the bottom of the drilled hole through the anchor cable; stirring the anchoring agent to bond the anchoring agent with the anchor cable and the wall of the drilled hole; and taking out the installation pipe and the wall protection pipe, installing an anchor cable tray and an anchor cable nut on the anchor cable for fixing, and stretching the anchor cable.
Description
Technical Field
The invention relates to the technical field of anchor cable drilling, in particular to a method for installing an anchor cable through loosening and drilling.
Background
The anchor rod (cable) support is one of the most extensive techniques for coal mine roadway support, and has outstanding advantages in the aspects of improving the strength of a rock body, preventing or delaying the deformation development of surrounding rocks, keeping the integrity of the surrounding rocks and the shape of a roadway section, improving the support effect, reducing the support cost, accelerating the roadway forming speed and the like.
The hole forming rate of the anchor rod (cable) drill hole becomes a main reason influencing the tunneling speed of the tunnel, however, along with the increase of the mining depth, the coal rock body is under the action of high ground stress, and the phenomena of large deformation such as crushing and expansion of surrounding rock and the like occur after the tunnel is excavated, so that the anchor rod (cable) drill hole is difficult to form and the hole forming rate is low; in addition, due to the influences of characteristics of rock stratums of coal rock bodies, lithology between layers and occurrence structure differences, special structural surfaces such as a weak structural surface, a fracture broken zone, a weak interlayer, a broken interlayer and a argillization interlayer are formed in the rock stratums, when an anchor rod (cable) is drilled and drilled to the position, holes are easy to collapse and difficult to form, even if holes are formed, the hole wall is broken, the hole diameter of the section of the drilled hole is large, when an anchoring agent is pushed to the section, the anchoring agent is easy to bend and is accumulated at the position, and the anchoring agent is difficult to push into the bottom of the hole, so that the construction quality is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the method for installing the anchor cable through the loose broken drill hole, the method of combining the wall protection pipe and the installation pipe is adopted, the problems of easy hole collapse and difficult hole forming of the anchor cable (rod) drill hole in a broken medium are solved, and the problems that the hole diameter is increased due to the drilling of the drill hole in a broken section, and the anchor cable is bent and difficult to pass through in the hole diameter increasing section during the installation of the anchor cable are also avoided, so that the problem of the support of the loose broken rock stratum is effectively solved.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for installing a cable bolt through a loose drill hole comprises the following steps:
(1) when the drilled hole passes through the broken rock mass, the drill rod is withdrawn, and the large-diameter drill bit is replaced to sleeve the casing pipe on the outer part of the drill rod;
(2) drilling the drill rod into the anchor cable hole again, drilling the drill bit forwards to form a drilling hole expansion section, pushing the wall protection pipe while drilling the drill bit, fixing the wall protection pipe on the drilling hole expansion section, and correspondingly lengthening the wall protection pipe when each drill rod is lengthened;
(3) when the drill bit passes through the broken layer, replacing the conventional anchor cable drill bit, and continuously drilling the rest anchor cable holes;
(4) after the drilling is finished, the drill rod is withdrawn, a section of installation pipe is pushed into the drilling hole, and the installation pipe penetrates into one end of the wall protection pipe and penetrates out of the other end of the wall protection pipe;
(5) sequentially pushing the anchoring agent and the anchor cable into the installation pipe, and delivering the anchoring agent to the bottom of the drilled hole through the anchor cable;
(6) stirring the anchoring agent to bond the anchoring agent with the anchor cable and the wall of the drilled hole;
(7) and taking out the installation pipe and the wall protection pipe, installing an anchor cable tray and an anchor cable nut on the anchor cable for fixing, and stretching the anchor cable.
Preferably, the one end of protecting the wall pipe is the public head of grafting, and the other end of protecting the wall pipe is female head of grafting be equipped with the dog on the public head's of grafting the lateral wall, be equipped with annular and spout on the inner wall of female head of grafting, the annular passes through spout and outside intercommunication, the dog cooperates with spout and annular respectively.
Preferably, the installation pipe in the step (4) penetrates out of the other end of the wall protection pipe by a length of more than 50 cm.
Preferably, in the step (5), before the anchor cable is pushed in, the anchor cable is mounted with a hard resin stop ring, the hard resin stop ring is close to the anchoring section, and the anchoring agent is separated from the end of the mounting pipe by the hard resin stop ring.
Preferably, in the step (6), the mounting pipe is tightly clamped by a clamp ring when the anchoring agent is stirred, so that the mounting pipe and the retaining pipe are fixed.
Preferably, the diameter of the large-diameter drill in the step (1) is 50-75mm, and the wall protecting pipe is an iron pipe or a seamless steel pipe with the outer diameter of 50mm and the wall thickness of 4 mm.
Preferably, the diameter of the conventional anchor cable drill bit in the step (3) is 27-32 mm.
Preferably, the installation pipe in the step (4) is a thin-walled stainless steel pipe with the inner diameter of 25-32 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the mode of combining the wall protection pipe and the installation pipe, solves the problems of easy hole collapse and difficult hole forming of the drilled hole of the anchor cable (rod) in the crushing medium, and simultaneously avoids the problem that the hole diameter is increased due to the drilling of the drilled hole in the crushing section, so that the anchoring agent is bent in the hole diameter increasing section and is difficult to pass through when the anchor cable is installed, thereby effectively solving the problem of supporting the loosened rock stratum; the method is easy to construct, simple and convenient to operate, remarkable in effect, safe and reliable.
2. By utilizing the installation pipe, the anchoring agent can smoothly pass through the drilling hole expansion section, and the problem of insufficient stirring of the anchoring agent caused by bending of the anchor cable in the anchoring agent stirring process is also avoided.
3. And a hard resin baffle ring is arranged at the tail end of the anchor cable to separate the anchoring agent from the end part of the installation pipe, so that the installation pipe can be conveniently withdrawn.
Drawings
FIG. 1 is a schematic view of the present invention during drilling;
FIG. 2 is a schematic structural view of the anchor cable after installation;
FIG. 3 is a first schematic structural diagram of a wall protection pipe;
fig. 4 is a second schematic structural diagram of the wall protection pipe.
In the figure: 1-protecting the wall pipe; 101-a stopper; 102-male plug-in; 103-ring groove; 104-a chute; 105-a female plug; 2-installing a pipe; 3-breaking the rock mass; 4-anchor cable; 5-hard resin baffle ring; 6-an anchoring section; 7-anchor cable trays; 8-anchor cable nuts; 9-drilling hole enlarging section; 10-anchor cable holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, when the drill hole passes through the broken area, the hole collapse and the drill clamping occur, and when the problem of difficult hole forming of the drill hole occurs, by adopting the method, the anchor cable installation method through the loose drill hole comprises the following steps:
(1) when the drilled hole passes through the fractured rock mass 3, withdrawing the drill rod, and replacing the large-diameter drill bit to sleeve the casing pipe 1 on the outer part of the drill rod; the diameter of the large-diameter drill is 50-75mm, and the wall protection pipe 1 is an iron pipe or a seamless steel pipe with the outer diameter of 50mm and the wall thickness of 4 mm.
(2) Drilling the drill rod into the anchor cable hole 10 again, drilling the drill bit forwards to form a drilling hole expansion section 9, pushing the wall protection pipe 1 by the drill bit while drilling, fixing the wall protection pipe 1 on the drilling hole expansion section 9, and correspondingly lengthening the wall protection pipe 1 when the drill rod is lengthened;
(3) after the drill bit passes through the crushed layer, replacing the conventional anchor cable drill bit, and continuously drilling the rest anchor cable hole 10, wherein the diameter of the conventional anchor cable drill bit is 27-32 mm;
(4) after the drilling is finished, withdrawing the drill rod, pushing a section of the installation pipe 2 in the drilling hole, penetrating the installation pipe 2 into one end of the wall protection pipe 1 and penetrating out of the other end of the wall protection pipe 1, and penetrating out of the installation pipe 2 from the other end of the wall protection pipe 1 for a length of more than 50 cm; the installation pipe 2 is a thin-wall stainless steel pipe with the inner diameter of 25-32mm, and the length is preferably within the range of penetrating through the crushed rock body 3;
(5) sequentially pushing an anchoring agent and an anchor cable into the installation pipe 2, delivering the anchoring agent to the bottom of a drilled hole through the anchor cable, installing a hard resin retaining ring 5 on the anchor cable 4 before pushing the anchor cable, wherein the hard resin retaining ring 5 is close to the anchoring section 6, and the anchoring agent is separated from the end part of the installation pipe 2 through the hard resin retaining ring 5 so as to facilitate the withdrawal of the installation pipe 2;
(6) stirring the anchoring agent to bond the anchoring agent with the anchor cable and the wall of the drilled hole, and clamping the mounting pipe 2 by using a clamping ring during stirring the anchoring agent to fix the mounting pipe 2 and the wall protection pipe 1;
(7) and taking out the mounting pipe 2 and the wall protecting pipe 1, mounting an anchor cable tray 7 and an anchor cable nut 8 on the anchor cable 4 for fixing, and tensioning the anchor cable.
The mode of combining the wall protection pipe 1 and the installation pipe 2 is adopted, so that the problems of easy hole collapse and difficult hole forming of the drilled hole of the anchor cable (rod) in the crushing medium are solved, and the problems that the hole diameter is increased due to the drilling of the drilled hole in the crushing section and the anchoring agent is bent in the hole diameter increasing section and is difficult to pass when the anchor cable is installed are also avoided, so that the problem of loose rock stratum support is effectively solved; the method is easy to construct, simple and convenient to operate, remarkable in effect, safe and reliable.
In addition, as shown in fig. 3-4, one end of the wall protection pipe 1 is a male plug 102, the other end of the wall protection pipe 1 is a female plug 105, a stopper 101 is arranged on the side wall of the male plug 102, an annular groove 103 and a sliding groove 104 are arranged on the inner wall of the female plug 105, the annular groove 103 is communicated with the outside through the sliding groove 104, and the stopper 101 is respectively matched with the sliding groove 104 and the annular groove 103. The butt joint between the two wall protection pipes 1 is realized through the structure, the pipe diameter cannot be changed after the butt joint, and the smoothness of the inner diameter after the connection is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for installing an anchor cable through a loose drill hole is characterized in that: the method comprises the following steps:
(1) when the drilled hole passes through the broken rock mass, the drill rod is withdrawn, and the large-diameter drill bit is replaced to sleeve the casing pipe on the outer part of the drill rod;
(2) drilling the drill rod into the anchor cable hole again, drilling the drill bit forwards to form a drilling hole expansion section, pushing the wall protection pipe while drilling the drill bit, fixing the wall protection pipe on the drilling hole expansion section, and correspondingly lengthening the wall protection pipe when each drill rod is lengthened;
(3) when the drill bit passes through the broken layer, replacing the conventional anchor cable drill bit, and continuously drilling the rest anchor cable holes;
(4) after the drilling is finished, the drill rod is withdrawn, a section of installation pipe is pushed into the drilling hole, and the installation pipe penetrates into one end of the wall protection pipe and penetrates out of the other end of the wall protection pipe;
(5) sequentially pushing the anchoring agent and the anchor cable into the installation pipe, and delivering the anchoring agent to the bottom of the drilled hole through the anchor cable;
(6) stirring the anchoring agent to bond the anchoring agent with the anchor cable and the wall of the drilled hole;
(7) and taking out the installation pipe and the wall protection pipe, installing an anchor cable tray and an anchor cable nut on the anchor cable for fixing, and stretching the anchor cable.
2. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: protect the one end of wall pipe for the public head of grafting, protect the other end of wall pipe for the female head of grafting be equipped with the dog on the lateral wall of the public head of grafting, be equipped with annular and spout on the inner wall of the female head of grafting, the annular passes through spout and outside intercommunication, the dog cooperates with spout and annular respectively.
3. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: and (4) penetrating the installation pipe out of the other end of the wall protection pipe by a length of more than 50 cm.
4. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: in the step (5), before the anchor cable is pushed in, the anchor cable is installed with a hard resin retaining ring, the hard resin retaining ring is close to the anchoring section, and the anchoring agent is separated from the end part of the installation pipe through the hard resin retaining ring.
5. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: and (6) clamping the mounting pipe by using a clamping ring when the anchoring agent is stirred so as to fix the mounting pipe and the retaining pipe.
6. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: the diameter of the large-diameter drill in the step (1) is 50-75mm, and the wall protection pipe is an iron pipe or a seamless steel pipe with the outer diameter of 50mm and the wall thickness of 4 mm.
7. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: the diameter of the conventional anchor cable drill bit in the step (3) is 27-32 mm.
8. A method of installing a cable bolt through a loose borehole as claimed in claim 1, wherein: the installation pipe in the step (4) is a thin-wall stainless steel pipe with the inner diameter of 25-32 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010118083.XA CN111156041A (en) | 2020-02-25 | 2020-02-25 | Method for installing anchor cable through loosening and drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010118083.XA CN111156041A (en) | 2020-02-25 | 2020-02-25 | Method for installing anchor cable through loosening and drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111156041A true CN111156041A (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010118083.XA Pending CN111156041A (en) | 2020-02-25 | 2020-02-25 | Method for installing anchor cable through loosening and drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111156041A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706372A (en) * | 2020-07-21 | 2020-09-25 | 河南理工大学 | Collapse anchoring hole through hole and anchoring agent positioning and pushing device and operation method |
| CN113820059A (en) * | 2021-10-20 | 2021-12-21 | 辽宁工程技术大学 | Earth stress measurement hollow inclusion positioning device and using method |
| CN113882441A (en) * | 2021-10-13 | 2022-01-04 | 河海大学 | Early warning method for earthquake instability of high and steep slope under interaction of pier stud-pile-soil foundation and application of early warning method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003194A (en) * | 2010-10-30 | 2011-04-06 | 中国矿业大学 | Rapid installation process of resin anchor bar and device thereof |
| CN103410542A (en) * | 2013-08-08 | 2013-11-27 | 中国矿业大学 | Device and method for improving hole forming efficiency and anchoring performance of anchor rod and anchor cable of roadway floor |
| CN107503681A (en) * | 2017-09-21 | 2017-12-22 | 中建五局土木工程有限公司 | Karst area is grown up anchor cable forming hole method |
| CN210067990U (en) * | 2018-12-28 | 2020-02-14 | 中国石油天然气股份有限公司 | Petroleum drill pipe |
-
2020
- 2020-02-25 CN CN202010118083.XA patent/CN111156041A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003194A (en) * | 2010-10-30 | 2011-04-06 | 中国矿业大学 | Rapid installation process of resin anchor bar and device thereof |
| CN103410542A (en) * | 2013-08-08 | 2013-11-27 | 中国矿业大学 | Device and method for improving hole forming efficiency and anchoring performance of anchor rod and anchor cable of roadway floor |
| CN107503681A (en) * | 2017-09-21 | 2017-12-22 | 中建五局土木工程有限公司 | Karst area is grown up anchor cable forming hole method |
| CN210067990U (en) * | 2018-12-28 | 2020-02-14 | 中国石油天然气股份有限公司 | Petroleum drill pipe |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706372A (en) * | 2020-07-21 | 2020-09-25 | 河南理工大学 | Collapse anchoring hole through hole and anchoring agent positioning and pushing device and operation method |
| CN111706372B (en) * | 2020-07-21 | 2022-01-14 | 河南理工大学 | Collapse anchoring hole through hole and anchoring agent positioning and pushing device and operation method |
| CN113882441A (en) * | 2021-10-13 | 2022-01-04 | 河海大学 | Early warning method for earthquake instability of high and steep slope under interaction of pier stud-pile-soil foundation and application of early warning method |
| CN113882441B (en) * | 2021-10-13 | 2022-05-03 | 河海大学 | Earthquake instability early warning method for high and steep slope and application thereof |
| CN113820059A (en) * | 2021-10-20 | 2021-12-21 | 辽宁工程技术大学 | Earth stress measurement hollow inclusion positioning device and using method |
| CN113820059B (en) * | 2021-10-20 | 2024-01-05 | 辽宁工程技术大学 | Positioning device for hollow inclusion for ground stress measurement and use method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200515 |
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| RJ01 | Rejection of invention patent application after publication |