CN112554921A - Hollow tensioning anchor rod surrounding rock reinforcing method - Google Patents
Hollow tensioning anchor rod surrounding rock reinforcing method Download PDFInfo
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- CN112554921A CN112554921A CN202011408721.8A CN202011408721A CN112554921A CN 112554921 A CN112554921 A CN 112554921A CN 202011408721 A CN202011408721 A CN 202011408721A CN 112554921 A CN112554921 A CN 112554921A
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- anchor rod
- anchor
- surrounding rock
- mounting hole
- reinforcing method
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- 239000011435 rock Substances 0.000 title claims abstract description 64
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 238000004873 anchoring Methods 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 239000011440 grout Substances 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
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- 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 provides a hollow tensioning anchor rod surrounding rock reinforcing method, which relates to the field of engineering supporting equipment and comprises the following steps: drilling an anchor rod mounting hole in the surrounding rock; placing an anchoring agent into the anchor rod mounting hole; driving the anchor rod to rotate to stir the anchoring agent; tensioning the anchor rod; and injecting grout into the anchor rod mounting hole through the anchor rod. The hollow tensioning anchor rod surrounding rock reinforcing method provided by the invention realizes the integrated construction of anchor rod tensioning and anchor rod mounting hole slurry injection, can meet the anchoring requirements of high pre-tightening force of difficult roadways and broken surrounding rocks, and has good reinforcing effect.
Description
Technical Field
The invention relates to the field of engineering support equipment, in particular to a method for reinforcing surrounding rock of a hollow tension anchor rod.
Background
The anchor bolt support is a reinforcing support mode adopted in surface engineering and tunnels such as underground mine engineering, side slopes, deep foundation pits of rock and soil, and has the advantages of low cost, good support effect, simplicity and convenience in operation, flexibility in use and the like.
In order to prevent the anchor bolt support from losing efficacy due to deformation of surrounding rocks, the reasonable pre-tightening force of the anchor bolt can increase the surrounding pressure of the surrounding rocks, effectively change the stress state of the surrounding rocks, exert the self-bearing capacity of the surrounding rocks and be beneficial to keeping the stability of the surrounding rocks of a roadway, so that the pre-tightening force of the anchor bolt is a main parameter of the anchor bolt support and is an important index of whether the anchor bolt material can play a role. The common hollow anchor rod for applying the pre-tightening force of the anchor rod usually adopts a nut fastening construction method, and for the broken surrounding rock, the physical and mechanical properties of the broken surrounding rock are improved after grouting, and the bearing capacity of the surrounding rock is improved. The difficult tunnel of underground works not only needs the stock to have great pretightning force, needs carry out the slip casting to the country rock moreover and consolidates, provides the bearing capacity of whole anchor bolt support system.
The anchor rod that uses at present commonly used adopts the construction method of nut fastening, screws up the nut, provides initial anchor rod pretightning force, and the moment of torsion is big more, and the anchor rod pretightning force is big more, but receives the effect of torsional shear stress in the anchor rod tightening process, and the actual stress of anchor rod is anchor rod axial pretensioning stress 1.3 times, reduces anchor rod bearing capacity, and the anchor rod is easy to split.
Disclosure of Invention
The invention provides a hollow tension anchor rod surrounding rock reinforcing method which is used for solving the problems that an anchor rod is easy to break and the function is single in the anchor rod supporting technology in the prior art.
The invention provides a hollow tension anchor rod surrounding rock reinforcing method, which comprises the following steps:
step S101, drilling an anchor rod mounting hole in surrounding rock;
step S102, placing an anchoring agent into the anchor rod mounting hole;
step S103, driving the anchor rod to rotate to stir the anchoring agent;
step S104, tensioning the anchor rod;
and S105, injecting grout into the anchor rod mounting hole through the anchor rod.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, the step S101 comprises the following steps:
step S1011, drilling holes at the preset positions of the surrounding rocks by using a drilling tool, and drilling the anchor rod mounting holes;
step S1012, cleaning water and slag in the bolt installation hole.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, before the step S1011, the following steps are further executed:
and step S1010, determining a preset position of the anchor rod mounting hole on the surrounding rock and marking the preset position.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, the step S103 comprises the following steps:
step S1031, inserting one end of the anchor rod into the anchor rod mounting hole, and pushing the anchoring agent to reach a preset position;
and step S1032, driving the anchor rod to rotate to stir the anchoring agent for a preset time.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, after the step S1032 is executed, the following steps are also executed:
and step S1033, arranging a sealing plug at the port of the anchor rod mounting hole.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, the step S104 comprises the following steps:
step S1041, fixing the other end of the anchor rod by using a tray, a ball pad and an anchor rod lock;
and step S1042, tensioning the anchor rod, and stopping tensioning when the tension applied to the anchor rod reaches a preset tension.
According to the hollow tension anchor rod surrounding rock reinforcing method provided by the invention, the surface hardness of the locking plate of the anchor rod lock is HRC 32-42.
According to the hollow tensioning anchor rod surrounding rock reinforcing method provided by the invention, one end of the anchor rod is provided with the stirring end head, and the peripheral surface of the other end of the anchor rod is provided with a plurality of grouting holes.
The hollow tensioning anchor rod surrounding rock reinforcing method provided by the invention realizes the integrated construction of anchor rod tensioning and anchor rod mounting hole slurry injection, can meet the anchoring requirements of high pre-tightening force of difficult roadways and broken surrounding rocks, and has good reinforcing effect.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic side view cross-sectional structure of a tension grouting anchor rod provided by the present invention;
FIG. 2 is a schematic side sectional view of a stirring tip according to the present invention;
FIG. 3 is a schematic diagram illustrating the use principle of the tension grouting anchor rod provided by the invention;
fig. 4 is a schematic flow chart of a hollow tension anchor rod surrounding rock reinforcing method provided by the invention.
Reference numerals:
100. an anchor body; 110. stirring the end head; 111. a liquid outlet hole; 120. a stirring section; 130. grouting holes; 140. grouting an end; 150. an anchor bolt lock; 151. a ball pad; 152. a tray; 153. sealing the plug; 154. an anchoring agent; 155. surrounding rocks; 156. a first grouting section; 157. and a second grouting section.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The hollow tension bolt surrounding rock reinforcing method of the present invention will be described with reference to fig. 1 to 4.
Fig. 1 illustrates a schematic side view sectional structure diagram of a tension grouting anchor rod, and as shown in fig. 1, the tension grouting anchor rod includes an anchor rod body 100, the anchor rod body 100 is in a rod-shaped structure, the anchor rod body 100 is made of metal, and a rated predetermined tension force that can be borne by the anchor rod body 100 is specifically determined according to engineering requirements. The anchor rod body 100 is provided with a flow passage inside, the flow passage forms a liquid outlet at the end of one end of the anchor rod body 100, and a liquid inlet at the end of the other end.
Fig. 2 illustrates a schematic side view cross-sectional structure of a stirring tip according to the present invention, as shown in fig. 2, a stirring tip 110 is disposed at one end of the anchor rod body 100, the stirring tip 110 is provided with a liquid outlet hole 111 communicated with the liquid outlet, one end of the stirring tip 110 away from the anchor rod body 100 is an inclined surface, and a grouting hole 130 communicated with a flow passage is disposed on an outer circumferential surface of the other end of the anchor rod body 100. The tensioning grouting anchor rod provided by the invention can be used for tensioning and grouting, so that the integrated construction of anchor rod tensioning and anchor rod mounting hole grout injection is realized, the high-pretightening-force anchoring requirements of difficult roadways and broken surrounding rocks can be met, and a good reinforcing effect is achieved.
According to an embodiment of the present invention, the outer circumferential surface of one end of the anchor body 100 is provided with the stirring part 120, so that an anchor stirring section having a stirring function is formed at one end of the anchor body 100, and the stirring part 120 can stir the anchoring agent 154 when the anchor body 100 is rotated. The stirring portion 120 is a screw thread in this embodiment, and the screw thread and the stirring tip 110 stir the anchoring agent 154 during the rotation of the anchor body 100. Of course, the stirring portion 120 may be a spiral wire welded to the outer circumferential surface of one end of the anchor body 100, or may be integrally formed with one end of the anchor body 100.
Fig. 3 illustrates a schematic diagram of a use principle of the tension grouting bolt, and as shown in fig. 3, according to an embodiment of the present invention, the tension grouting bolt further includes: and the grouting end 140 is detachably connected with the other end of the anchor rod body 100. In this embodiment, the liquid inlet is provided with an internal thread, and one end of the grouting end 140 close to the anchor rod body 100 is in threaded connection with the other end of the anchor rod body 100 through the internal thread. One end of the stirring end head 110 close to the anchor rod body 100 is provided with an insertion part matched with the liquid outlet, and one end of the stirring end head 110 close to the anchor rod body 100 is in insertion connection with one end of the anchor rod body 100 through the insertion part. The grouting holes 130 are arranged at equal intervals, and the axes of the grouting holes 130 are perpendicular to the axis of the flow passage. The grouting hole 130 is a main channel, most of the grout in the flow channel enters the anchor rod mounting hole through the grouting hole 130, and only a small amount of grout and air enter the anchor rod mounting hole through the liquid outlet hole 111 of the stirring end head 110. The preset tension force of the anchor rod is calculated according to 60% -90% of the yield strength of the anchor rod in the process of tensioning the anchor rod, and the anchor rod is not subjected to torsional shear stress in the tensioning process.
Fig. 4 illustrates a schematic flow chart of a hollow tension anchor rod surrounding rock reinforcing method, as shown in fig. 4, the hollow tension anchor rod surrounding rock reinforcing method provided by the present invention is performed based on the tension grouting anchor rod described in the above embodiment, and the hollow tension anchor rod surrounding rock reinforcing method includes the following steps:
step S101, drilling an anchor rod mounting hole in surrounding rock 155;
step S102, placing anchoring agent 154 into the anchor rod mounting hole;
step S103, driving the anchor rod to rotate to stir the anchoring agent 154;
step S104, tensioning the anchor rod;
and step S105, injecting grout into the anchor mounting hole through the anchor.
The hollow tensioning anchor rod surrounding rock reinforcing method provided by the invention realizes the integrated construction of anchor rod tensioning and anchor rod mounting hole slurry injection, can meet the high pre-tightening force anchoring requirements of difficult roadways and broken surrounding rocks 155, and has a good reinforcing effect.
According to an embodiment of the invention, the method for reinforcing the surrounding rock of the hollow tension anchor rod in the embodiment comprises the following steps:
step S1011, drilling holes at preset positions of the surrounding rock 155 by using a drilling tool, and drilling anchor rod mounting holes;
the drilling tool here comprises a jumbolter and a rock drill, which, in addition to being used for drilling the bolt mounting hole, are also used for driving the movement and rotation of the bolt in order to propel the anchoring agent 154 to move and to stir the anchoring agent 154. The anchor rod mounting hole is used for fixing an anchor rod, and the size and the position of the anchor rod mounting hole are determined according to the design requirements of underground engineering roadway support.
Step S1012, cleaning water and slag in the anchor rod mounting hole;
the bolt mounting hole is cleaned of water and slag in order to avoid affecting the anchoring agent 154.
Step S1013, placing the anchoring agent 154 into the anchor rod installation hole;
step S1014, driving the anchor rod to rotate to stir the anchoring agent 154;
step S1015, tensioning the anchor rod;
and step S1016, injecting grout into the anchor mounting hole through the anchor.
In one embodiment, before performing step S1011, the steps of:
in step S1010, a predetermined position of the anchor mounting hole is determined on the surrounding rock 155 and marked.
The preset position of the anchor rod mounting hole needs to be calculated before drilling, and the reasonable planning of the preset position of the anchor rod mounting hole has important significance for increasing the confining pressure of the surrounding rock 155 and changing the stress state of the surrounding rock 155. After the preset position is determined, drilling is only needed to be carried out at the marked position during construction.
According to an embodiment of the invention, the method for reinforcing the surrounding rock of the hollow tension anchor rod in the embodiment comprises the following steps:
step S1029, drilling a bolt mounting hole in the surrounding rock 155;
step S1030, placing the anchoring agent 154 into the anchor rod installation hole;
step S1031, inserting one end of the anchor into the anchor mounting hole, and pushing the anchoring agent 154 to a predetermined position;
the movement of the anchor rod is driven by the anchor rod drilling machine, the other end of the anchor rod is connected with one end of the stirrer, and the other end of the stirrer is connected with the anchor rod drilling machine. After one end of the anchor rod is inserted into the anchor rod mounting hole, the anchor rod drilling machine is started, the anchor rod drilling machine pushes the anchor rod to enter the anchor rod mounting hole, meanwhile, one end of the anchor rod pushes the anchoring agent 154 to move towards the inside of the anchor rod mounting hole, the anchor rod and the anchoring agent 154 reach a preset position, and the anchor rod drilling machine stops.
Step S1032, driving the anchor rod to rotate to stir the anchoring agent 154 for a predetermined time;
the jumbolter begins to rotate after the jumbolter stops pushing the anchor rod to move, the jumbolter drives the anchor rod to rotate, one end of the anchor rod is provided with a stirring end head 110, the outer peripheral surface of one end of the anchor rod is provided with threads, and the outer peripheral surface of the other end of the anchor rod is provided with a plurality of grouting holes 130. The rotating anchor rod drives the stirring end head 110 to rotate, the anchoring agent 154 is stirred by the stirring end head 110 and the threads, the rotation of the anchor rod drilling machine is stopped after the preset stirring time, and the anchor rod drilling machine and the stirrer are removed when the solidification time of the anchoring agent 154 is reached.
Step S1034, tensioning the anchor rod;
in step S1035, grout is injected through the anchor to the anchor mounting hole.
In one embodiment, the following steps are also performed after performing step S1032:
in step S1033, a sealing plug 153 is provided at the port of the anchor mounting hole.
The sealing plug 153 is provided to prevent grout injected into the anchor mounting hole from flowing out to affect the reinforcing effect.
According to an embodiment of the invention, the method for reinforcing the surrounding rock of the hollow tension anchor rod in the embodiment comprises the following steps:
step S1038, drilling an anchor rod mounting hole in the surrounding rock 155;
step S1039, placing the anchoring agent 154 into the anchor rod installation hole;
step S1040, driving the anchor rod to rotate to stir the anchoring agent 154;
step S1041, fixing the other end of the anchor rod by using the tray 152, the ball pad 151, and the anchor rod lock 150;
the tray 152 is used for withstanding the country rock 155, the other end of stock is located to ball pad 151 and stock tool to lock 150 cover, and ball pad 151 is located between tray 152 and stock tool to lock 150, and the locking plate of stock tool to lock 150 is used for blocking the other end of stock, and the surface hardness of the locking plate of stock tool to lock 150 is HRC32-42, can radially firmly block the outer peripheral face of the other end of stock after the locking plate atress, ensures that stock tool to lock 150 can lock the other end of stock, realizes fixing the stock.
And step S1042, tensioning the anchor rod, and stopping tensioning when the tension applied to the anchor rod reaches a preset tension.
Tensioning is carried out by means of a jack, the jack is connected with the other end of the anchor rod, an oil line interface of the jack is connected with a tensioning power source through an oil pipe, the tensioning power source is started, the jack begins to tension the anchor rod along the axis of the anchor rod in the direction far away from the anchor rod mounting hole, the jack is unloaded after the tension force applied to the anchor rod reaches the preset tension force, the tensioning power source is closed, the anchor rod is stopped to be tensioned, at the moment, the anchor rod is locked by the anchor rod lock 150, and the tensioning force of the anchor rod can be kept constant. The preset tension force of the anchor rod is calculated according to 60% -90% of the yield strength of the anchor rod in the process of tensioning the anchor rod, and the anchor rod is not subjected to torsional shear stress in the tensioning process.
And S1043, injecting grout into the anchor rod mounting hole through the anchor rod.
After the anchor rod stops tensioning, the other end of the anchor rod is communicated with the grouting pipe through the grouting end 140, grout is injected into the anchor rod mounting hole, a flow channel through which the grout flows through the anchor rod is divided into two paths, and one path of grout enters the annular gap between the outer peripheral surface of the anchor rod body 100 and the inner wall of the anchor rod mounting hole through the grouting hole 130 to form a first grouting section 156. The other path of slurry and a small amount of air enter the anchor rod mounting hole through the liquid outlet hole 111 of the stirring end head 110, a second grouting section 157 is formed in front of the stirring end head 110, and grouting is performed through two paths, so that rapid grouting is facilitated. And when the grouting amount and the grouting pressure reach the preset requirements, stopping grouting, and finishing the reinforcement of the surrounding rock 155.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A hollow tension anchor rod surrounding rock reinforcing method is characterized by comprising the following steps:
step S101, drilling an anchor rod mounting hole in surrounding rock;
step S102, placing an anchoring agent into the anchor rod mounting hole;
step S103, driving the anchor rod to rotate to stir the anchoring agent;
step S104, tensioning the anchor rod;
and S105, injecting grout into the anchor rod mounting hole through the anchor rod.
2. A hollow tension anchor surrounding rock reinforcing method according to claim 1, wherein the step S101 includes the steps of:
step S1011, drilling holes at the preset positions of the surrounding rocks by using a drilling tool, and drilling the anchor rod mounting holes;
step S1012, cleaning water and slag in the bolt installation hole.
3. A hollow tension bolt surrounding rock reinforcing method according to claim 2, characterized in that before the step S1011, the steps of:
and step S1010, determining a preset position of the anchor rod mounting hole on the surrounding rock and marking the preset position.
4. A hollow tension bolt surrounding rock reinforcing method according to claim 1, wherein the step S103 includes the steps of:
step S1031, inserting one end of the anchor rod into the anchor rod mounting hole, and pushing the anchoring agent to reach a preset position;
and step S1032, driving the anchor rod to rotate to stir the anchoring agent for a preset time.
5. The hollow tension bolt surrounding rock reinforcing method according to claim 4, wherein the following steps are further performed after the step S1032 is performed:
and step S1033, arranging a sealing plug at the port of the anchor rod mounting hole.
6. A hollow tension bolt surrounding rock reinforcing method according to claim 1, wherein the step S104 includes the steps of:
step S1041, fixing the other end of the anchor rod by using a tray, a ball pad and an anchor rod lock;
and step S1042, tensioning the anchor rod, and stopping tensioning when the tension applied to the anchor rod reaches a preset tension.
7. A hollow tension anchor surrounding rock reinforcing method according to claim 5, wherein the surface hardness of the lock sheet of the anchor lock is HRC 32-42.
8. A hollow tension anchor surrounding rock reinforcing method according to any one of claims 1 to 7, wherein one end of the anchor is provided with a stirring tip, and the other end of the anchor is provided with a plurality of grouting holes on its outer peripheral surface.
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| CN202011408721.8A CN112554921A (en) | 2020-12-04 | 2020-12-04 | Hollow tensioning anchor rod surrounding rock reinforcing method |
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| CN202011408721.8A CN112554921A (en) | 2020-12-04 | 2020-12-04 | Hollow tensioning anchor rod surrounding rock reinforcing method |
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| US20160326873A1 (en) * | 2015-05-08 | 2016-11-10 | Normet International, Ltd. | Locally Anchored Self-Drilling Hollow Rock Bolt |
| CN205895284U (en) * | 2016-08-12 | 2017-01-18 | 中冶华天工程技术有限公司 | Anchor pipe and anchor support system |
| CN110761819A (en) * | 2019-10-31 | 2020-02-07 | 天地科技股份有限公司 | A prestressed grouting bolt |
| CN211174165U (en) * | 2019-11-29 | 2020-08-04 | 西南交通大学 | A timely active support anchoring system |
| CN111456781A (en) * | 2020-04-07 | 2020-07-28 | 杭州图强工程材料有限公司 | Hollow anchor rod with orifice capable of releasing energy and yielding pressure and construction method thereof |
| CN111828067A (en) * | 2020-07-17 | 2020-10-27 | 太原理工大学 | A kind of expansion anchor bolt used for roadway surrounding rock control and using method thereof |
| CN111720149A (en) * | 2020-07-22 | 2020-09-29 | 枣庄市顺翔科技发展有限公司 | Mining anchor rope of cavity slip casting |
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Address after: Tiandi building, Coal Research Institute, No.5, Qingnian Gou Road, Chaoyang District, Beijing 100013 Applicant after: CCTEG Coal Mining Research Institute Co.,Ltd. Applicant after: CCTEG Beijing Tianma Intelligent Control Technology Co.,Ltd. Address before: Tiandi building, Coal Research Institute, No.5, Qingnian Gou Road, Chaoyang District, Beijing 100013 Applicant before: CCTEG Coal Mining Research Institute Co.,Ltd. Applicant before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. |
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Application publication date: 20210326 |