CN111577357A - Drilling and anchoring integrated hollow anchor rod and anchoring method - Google Patents
Drilling and anchoring integrated hollow anchor rod and anchoring method Download PDFInfo
- Publication number
- CN111577357A CN111577357A CN202010265770.4A CN202010265770A CN111577357A CN 111577357 A CN111577357 A CN 111577357A CN 202010265770 A CN202010265770 A CN 202010265770A CN 111577357 A CN111577357 A CN 111577357A
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- anchoring
- drilling
- hollow
- hollow anchor
- Prior art date
- 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
- 238000004873 anchoring Methods 0.000 title claims abstract description 96
- 238000005553 drilling Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 239000011435 rock Substances 0.000 claims description 15
- 239000003245 coal Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring 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
- E21D20/02—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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- 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 a drilling and anchoring integrated hollow anchor rod and an anchoring method, wherein the drilling and anchoring integrated hollow anchor rod comprises a drill bit, a hollow anchor rod, a supporting plate, a locking nut and a water channel hole; one end of the hollow anchor rod is connected with the drill bit, and the other end of the hollow anchor rod is provided with a supporting plate through a locking nut; the hollow anchor rod is internally provided with a water channel hole penetrating through the hollow anchor rod in the extending direction; the drill bit and the hollow anchor rod are connected into a whole, the disposable hollow anchor rod is endowed with the function of a drill rod, the one-time dismantling of the drill rod on the anchor rod machine and the one-time installation of the anchor rod on the anchor rod machine are omitted, and the function of drilling and anchoring into a whole is realized; the tail end of the hollow anchor rod is provided with a water channel hole and communicated with the hollow anchor rod, and when the hollow anchor rod is anchored, the stored anchoring agents in various forms such as self-expansion anchoring agents, compression anchoring agents and the like are pumped into a drilled hole through the water channel hole, so that full-automatic anchoring is realized.
Description
Technical Field
The invention relates to the technical field of anchor rods, in particular to a drilling and anchoring integrated hollow anchor rod and an anchoring and grouting method.
Background
At present, the tunnel engineering and mine roadway engineering quantity in China is large, millions of workers are engaged in rock mass and coal body supporting, the working environment is very severe, the labor intensity is high, and the accident rate is high. The conventional anchoring operation completes one anchoring process as follows:
(1) installing a special drill rod on the drilling machine for drilling, and withdrawing and removing the drill rod after drilling;
(2) the method comprises the following steps of (1) filling an anchoring agent into a drilled hole, installing an anchor rod on a drilling machine, operating the drilling machine to drive the anchor rod to send the anchoring agent to the top of the hole, and rotationally stirring to solidify the anchoring agent;
(3) tightening the anchor bolt screw to complete anchoring;
generally, the drill rod is made of hollow hexagonal steel, and the anchor rod is made of round steel or threaded steel. In the traditional anchoring operation, the drill rod is specially used for drilling and can be repeatedly used for many times. The anchor rod is used for anchoring the coal body of the rock mass, and the anchor rod is not repeatedly used after being anchored.
By the above, the existing technology of drilling and anchoring separation needs a special drill rod to complete drilling, and after the drill rod is dismantled, the drill rod is replaced by an anchor rod for anchoring, so that the process has the following defects:
1. the drill rod and the anchor rod are used separately, the process is complicated, multiple persons are required to complete the process in a matching way, and the efficiency is lower;
2. the anchor rod has low precision and single function, can not realize automatic operation, and is easy to have faults and accidents;
3. the material of stock is single, can not satisfy the supporting work to the rock mass of different hardness, the different degree of depth.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a novel drilling and anchoring integrated hollow anchor rod and an anchoring method, which solve the problems that the drilling rod and the anchor rod proposed in the background technology are separately used, the working procedures are complicated, the automatic operation cannot be realized, and the efficiency is low; the anchor rod precision is low, the material singleness scheduling problem.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
the drilling and anchoring integrated hollow anchor rod comprises a drill bit, a hollow anchor rod, a supporting plate, a locking nut and a water channel hole; one end of the hollow anchor rod is connected with the drill bit, and the other end of the hollow anchor rod is provided with a supporting plate through a locking nut; in the hollow anchor rod, a water channel hole penetrating through the hollow anchor rod is formed in the extending direction of the hollow anchor rod.
The drilling and anchoring integrated hollow anchor rod is used for a drill rod and an anchor rod for anchoring rock mass or coal mass in tunnel or mine roadway tunneling, the drill rod and the anchor rod are combined into a whole, and the drilling and anchoring integrated hollow anchor rod has the functions of drilling and anchoring, so that the aim of anchoring the rock mass or coal mass is finally fulfilled. According to the drilling and anchoring integrated hollow anchor rod and the anchoring and grouting method, two processes are reduced in one traditional anchoring cycle, the working time is saved, the labor force is reduced, the working efficiency is improved, and the use is simpler and more convenient; along with the continuous improvement of the automation level of the anchoring equipment for installing the anchor rod and the gradual innovation of the anchoring agent material, the development of the hollow anchor rod integrating drilling and anchoring is more favorable for realizing the automatic and unmanned anchoring operation, is favorable for promoting the progress of the automatic operation and control of the anchoring industries such as rock mass, coal mass and the like, and has wide market application prospect.
As a preferable technical solution of the present invention, the hollow anchor rod has an external shape of any one of a hexagonal shape, a cylindrical shape with concave grains, a threaded shape, and a corrugated shape.
As a preferable technical scheme of the invention, the hollow anchor rod is in threaded connection with the drill bit.
As a preferable technical scheme of the invention, the hollow anchor rod is connected with the drill bit in a welding or one-step forming mode.
As a preferable technical scheme of the invention, the hollow anchor rod is made of any one of steel, glass fiber reinforced plastic and carbon fiber.
As a preferred technical solution of the present invention, the method for anchoring and grouting the drilling and anchoring integrated hollow anchor rod comprises the following steps:
s1: the anchoring agent is infiltrated into the hollow anchor rod integrated with the drilling and anchoring through the water passage hole (5);
s2: drilling a rock wall and a coal mine roadway where the anchor rod needs to be installed by using the drilling and anchoring integrated hollow anchor rod of S1;
s3: after drilling, the infiltrated anchoring agent is pumped into one end of the drilling and anchoring integrated hollow anchor rod connected with the drill bit (1) through the water passage hole (5) and then enters the drilled hole for anchoring.
In a preferred embodiment of the present invention, the anchoring agent is a self-expandable anchoring agent or a compressive anchoring agent.
(III) advantageous effects
Compared with the prior art, the invention provides a drilling and anchoring integrated hollow anchor rod and an anchoring method, which at least have the following beneficial effects:
1. the drill rod and the anchor rod are combined into a whole, and the anchoring agent is pumped into the drill hole through the water channel hole after the drill hole is drilled, so that the working procedure is simplified, the working time is saved, and the working efficiency is improved;
2. the anchor rod is machined by a machine tool, so that the specification is unified, the precision is high, the automatic operation is easy to realize, the drilling and anchoring are integrated, and the market application scene is wide;
3. the stock material is diversified, can adapt to the timbering work of the rock mass of different hardness, the different degree of depth.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view taken along the plane a-a in fig. 1.
In the figure: 1. a drill bit; 2. a hollow anchor rod; 3. a support plate; 4. locking the nut; 5. a water passage hole.
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.
Examples
Referring to fig. 1-2, the present invention provides the following technical solutions: the drilling and anchoring integrated hollow anchor rod and the anchoring method comprise a drill bit 1, a hollow anchor rod 2, a supporting plate 3, a locking nut 4 and a water channel hole 5; one end of the hollow anchor rod 2 is connected with the drill bit 1, and the other end of the hollow anchor rod is provided with a supporting plate 3 through a locking nut 4; the hollow anchor 2 has a water passage hole 5 penetrating the hollow anchor 2 in the extending direction thereof.
In the embodiment, the drill bit and the hollow anchor rod are connected into a whole, and the disposable hollow anchor rod is endowed with the function of a drill rod; the method is characterized in that a disposable drill bit is added for drilling, so that the hollow anchor rod has the functions of a drill rod and an anchor rod at the same time, namely, one-time dismantling of the drill rod on an anchor rod machine and one-time installation of the anchor rod on the anchor rod machine are omitted in one-time anchoring circulation process, namely, the anchor rod integrating drilling and anchoring is used, and the drill rod is not required to be dismantled after drilling to realize the function of integrating drilling and anchoring; the drill bit is a disposable drill bit, so that the cost can be saved; the tail thread of the hollow anchor rod adopts a processing mode of roll forming, a water channel hole is formed in the tail end of the hollow anchor rod and communicated with the hollow anchor rod, stored anchoring agents in various forms such as self-expansion anchoring agents and compression anchoring agents are pumped into the front end (connected with one end of a drill bit) of the hollow anchor rod through the water channel hole in the anchoring process, the automatic anchoring degree is further improved, the anchor rod is directly anchored after the anchoring agents are filled, and finally full-automatic anchoring is achieved.
Specifically, the hollow anchor rod 2 is in any one of a hexagonal shape, a cylindrical shape with concave grains, a threaded shape and a corrugated shape.
In this embodiment, the hollow anchor rod 2 is in one of a hexagonal shape, a polygonal shape, a cylindrical shape with concave lines, a threaded shape or a corrugated shape, so as to facilitate slag discharge and enhance adhesion and friction force.
Specifically, the hollow anchor rod 2 is in threaded connection with the drill bit 1.
In this embodiment, hollow stock 2 and drill bit 1 come to be connected through the screw thread, can dismantle drill bit 1 and hollow stock 2, the convenient change.
Specifically, the hollow anchor rod 2 is connected with the drill bit 1 in a welding or one-step forming mode.
In this embodiment, the hollow anchor rod 2 is connected with the drill bit 1 by welding or one-step forming, so that the effect of firm connection can be achieved.
Specifically, the hollow anchor rod 2 is made of any one of steel, glass fiber reinforced plastic and carbon fiber.
In the embodiment, a proper material can be selected to be used as the drilling and anchoring integrated anchor rod according to the hardness and the depth of the rock mass of the drilling and anchoring; the anchor rod is machined by a machine tool, the specification standard is unified, the precision and the quality are improved, and the automatic control is convenient to realize.
Specifically, the method for anchoring and grouting the drilling and anchoring integrated hollow anchor rod comprises the following steps:
s1: the anchoring agent is infiltrated into the hollow anchor rod integrated with the drilling and anchoring through the water passage hole (5);
s2: drilling a rock wall and a coal mine roadway where the anchor rod needs to be installed by using the drilling and anchoring integrated hollow anchor rod of S1;
s3: after drilling, the infiltrated anchoring agent is pumped into one end of the drilling and anchoring integrated hollow anchor rod connected with the drill bit (1) through the water passage hole (5) and then enters the drilled hole for anchoring.
In this embodiment, go into the drilling with the anchor agent pump that stores in advance and anchor in, compare in traditional anchor circulation, avoided drilling rod and stock separately to use, the process of filling in the anchor agent alone has reduced the anchor process, has practiced thrift man-hour, has improved work efficiency.
Specifically, the anchoring agent is a self-expanding anchoring agent or a compression anchoring agent.
In the embodiment, the self-expansion anchoring agent or the compression anchoring agent has strong permeability, can be strongly bonded with surrounding rocks around the drill hole, has the effect of filling fractured rocks, and enhances the anchoring force of the anchor rod.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The drilling and anchoring integrated hollow anchor rod is characterized by comprising a drill bit (1), a hollow anchor rod (2), a supporting plate (3), a locking nut (4) and a water channel hole (5); one end of the hollow anchor rod (2) is connected with the drill bit (1), and the other end of the hollow anchor rod is provided with a supporting plate (3) through a locking nut (4); the hollow anchor rod (2) is internally provided with a water channel hole (5) which penetrates through the hollow anchor rod (2) in the extending direction.
2. The hollow anchor-drilling integrated bolt according to claim 1, wherein the shape of the hollow bolt (2) is any one of hexagonal type, cylindrical and concave-grained type, threaded type or corrugated type.
3. A drill-anchor integrated hollow rock bolt according to claim 1, characterized in that the hollow rock bolt (2) is in threaded connection with a drill bit (1).
4. A drill-anchor integrated hollow bolt according to claim 1, characterized in that the hollow bolt (2) is welded or one-shot formed with the drill bit (1).
5. The hollow anchor-drilling integrated bolt according to claim 1, characterized in that the material of the hollow anchor rod (2) is any one of steel, glass fiber reinforced plastic and carbon fiber.
6. An anchoring method based on the drilling and anchoring integrated hollow anchor rod of any one of claims 1 to 5, characterized by comprising the following steps:
s1: the anchoring agent is infiltrated into the hollow anchor rod integrated with the drilling and anchoring through the water passage hole (5);
s2: drilling a rock wall and a coal mine roadway where the anchor rod needs to be installed by using the drilling and anchoring integrated hollow anchor rod of S1;
s3: after drilling, the infiltrated anchoring agent is pumped into one end of the drilling and anchoring integrated hollow anchor rod connected with the drill bit (1) through the water passage hole (5) and then enters the drilled hole for anchoring.
7. The method of anchoring a drill-anchor integrated hollow bolt according to claim 6, wherein the anchoring agent is a self-expanding anchoring agent or a compression anchoring agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265770.4A CN111577357A (en) | 2020-04-07 | 2020-04-07 | Drilling and anchoring integrated hollow anchor rod and anchoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265770.4A CN111577357A (en) | 2020-04-07 | 2020-04-07 | Drilling and anchoring integrated hollow anchor rod and anchoring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111577357A true CN111577357A (en) | 2020-08-25 |
Family
ID=72124426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010265770.4A Pending CN111577357A (en) | 2020-04-07 | 2020-04-07 | Drilling and anchoring integrated hollow anchor rod and anchoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111577357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090313A (en) * | 2021-04-30 | 2021-07-09 | 中煤科工开采研究院有限公司 | Multifunctional anchor rod |
| CN113638757A (en) * | 2021-08-13 | 2021-11-12 | 安徽金日晟矿业有限责任公司 | Pipe seam type anchor rod support and application method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002075116A1 (en) * | 2001-03-15 | 2002-09-26 | Atlas Copco Rock Drills Ab | A method for stabilization of rock and soil masses, and a rock bolt for practicing the method |
| JP2003253999A (en) * | 2002-03-01 | 2003-09-10 | Okabe Co Ltd | Work execution method for self-drilling lock bolt and anchor structure |
| WO2007059580A1 (en) * | 2005-11-24 | 2007-05-31 | Peter Andrew Gray | Self drilling rock bolt |
| CN202450523U (en) * | 2012-03-09 | 2012-09-26 | 贵州省水利水电勘测设计研究院 | Hollow self-drilling anchor rod support structure |
| CN204299597U (en) * | 2014-11-13 | 2015-04-29 | 罗宗帆 | The self-expanding anchor pole of rotation |
| CN204476444U (en) * | 2015-01-30 | 2015-07-15 | 安徽理工大学 | A kind of self-drilling hollow grouting cable anchor |
| CN107401417A (en) * | 2017-08-23 | 2017-11-28 | 山西煤炭运销集团裕兴煤业有限公司 | A kind of mine coal helps anchor recovering method |
| CN109779665A (en) * | 2019-03-29 | 2019-05-21 | 攀枝花学院 | Bore anchoring integrated anchor rod |
| CN109826656A (en) * | 2019-03-29 | 2019-05-31 | 攀枝花学院 | The anchor of drilling anchor one |
| CN109869172A (en) * | 2019-03-29 | 2019-06-11 | 攀枝花学院 | The anchor of drilling anchor high-pressure slip-casting one |
| CN212250092U (en) * | 2020-04-07 | 2020-12-29 | 山西海洁机电科技有限公司 | Drilling and anchoring integrated hollow anchor rod |
-
2020
- 2020-04-07 CN CN202010265770.4A patent/CN111577357A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002075116A1 (en) * | 2001-03-15 | 2002-09-26 | Atlas Copco Rock Drills Ab | A method for stabilization of rock and soil masses, and a rock bolt for practicing the method |
| JP2003253999A (en) * | 2002-03-01 | 2003-09-10 | Okabe Co Ltd | Work execution method for self-drilling lock bolt and anchor structure |
| WO2007059580A1 (en) * | 2005-11-24 | 2007-05-31 | Peter Andrew Gray | Self drilling rock bolt |
| CN202450523U (en) * | 2012-03-09 | 2012-09-26 | 贵州省水利水电勘测设计研究院 | Hollow self-drilling anchor rod support structure |
| CN204299597U (en) * | 2014-11-13 | 2015-04-29 | 罗宗帆 | The self-expanding anchor pole of rotation |
| CN204476444U (en) * | 2015-01-30 | 2015-07-15 | 安徽理工大学 | A kind of self-drilling hollow grouting cable anchor |
| CN107401417A (en) * | 2017-08-23 | 2017-11-28 | 山西煤炭运销集团裕兴煤业有限公司 | A kind of mine coal helps anchor recovering method |
| CN109779665A (en) * | 2019-03-29 | 2019-05-21 | 攀枝花学院 | Bore anchoring integrated anchor rod |
| CN109826656A (en) * | 2019-03-29 | 2019-05-31 | 攀枝花学院 | The anchor of drilling anchor one |
| CN109869172A (en) * | 2019-03-29 | 2019-06-11 | 攀枝花学院 | The anchor of drilling anchor high-pressure slip-casting one |
| CN212250092U (en) * | 2020-04-07 | 2020-12-29 | 山西海洁机电科技有限公司 | Drilling and anchoring integrated hollow anchor rod |
Non-Patent Citations (1)
| Title |
|---|
| 中国岩石力学工程学会岩石锚固与注浆技术专业委员会: "《锚固与注浆新技术 第二届全国岩石锚固与注浆学术会议论文集》", 30 June 2002, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090313A (en) * | 2021-04-30 | 2021-07-09 | 中煤科工开采研究院有限公司 | Multifunctional anchor rod |
| CN113638757A (en) * | 2021-08-13 | 2021-11-12 | 安徽金日晟矿业有限责任公司 | Pipe seam type anchor rod support and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10767480B2 (en) | Extensible reaming self-anchoring anchor rod and supporting method thereof | |
| CN206352481U (en) | Pipe-following drilling system and the anti-collapse aperture apparatus of steel floral tube | |
| CN204716272U (en) | Mining Assembled slip-casting roofbolt | |
| CN103382817B (en) | The anti-blocking drilling rod of a kind of mine floor anchoring | |
| CN212250092U (en) | Drilling and anchoring integrated hollow anchor rod | |
| CN111577357A (en) | Drilling and anchoring integrated hollow anchor rod and anchoring method | |
| CN111764940B (en) | Double-layer primary supporting structure of weak surrounding rock tunnel and construction method thereof | |
| CN202882966U (en) | Recoverable soft rock self-tapping anchor rod | |
| CN203248178U (en) | Downward-hole self-drilling grouting anchor rod | |
| CN108035742B (en) | Active and passive harmonious support method for extremely soft coal seam roadway | |
| CN103643976B (en) | Callable nylon separate assembling anchor pole and the installation of anchor pole and recovery method | |
| CN206448830U (en) | A kind of self-advancing type Hollow non-metallic screw thread reinforced resin anchor pole | |
| CN104790992A (en) | Simple anchor cable and lockset demounting connector device | |
| CN2568815Y (en) | Strengthening slip casting anchor stock | |
| CN110043301A (en) | A kind of ultimate soft rock anchor structure and construction method | |
| CN109736865B (en) | Gob-side entry driving coal pillar anchor bar structure and assembly and field installation method thereof | |
| AU2015387576A1 (en) | Mining chemical anchor cable anchor-unhooking apparatus and method | |
| CN100434655C (en) | Advanced supporting and protecting technology for cracked top plate of digging operation face | |
| CN209875198U (en) | Inverted expansion type high-strength tensile anchor rod for tunnel support | |
| CN213016407U (en) | Sleeve type recoverable anchor rod | |
| CN210141147U (en) | Prefabricated reinforced concrete anchor rod | |
| CN207944973U (en) | A kind of gib anchor pole | |
| CN1073501A (en) | Hydraulic expansion type anchor stock is prevented the roof fall of coal face wall caving | |
| CN111810207B (en) | Drilling and anchoring integrated anchoring device and method | |
| CN212079351U (en) | Improved anchor rod stirrer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |