CN109057843A - Anchoring section high-elongation shock resistance anchor pole and its anchoring process - Google Patents
Anchoring section high-elongation shock resistance anchor pole and its anchoring process Download PDFInfo
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- CN109057843A CN109057843A CN201811100026.8A CN201811100026A CN109057843A CN 109057843 A CN109057843 A CN 109057843A CN 201811100026 A CN201811100026 A CN 201811100026A CN 109057843 A CN109057843 A CN 109057843A
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- round steel
- steel pipe
- bolt
- shock resistance
- conical
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- 238000004873 anchoring Methods 0.000 title claims abstract description 36
- 230000035939 shock Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008569 process Effects 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 89
- 239000010959 steel Substances 0.000 claims abstract description 89
- 239000011435 rock Substances 0.000 claims description 46
- 206010058109 Hangnail Diseases 0.000 claims description 17
- 230000006378 damage Effects 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 208000027418 Wounds and injury Diseases 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000004992 fission Effects 0.000 claims description 3
- 208000014674 injury Diseases 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000003442 weekly effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 6
- 230000003044 adaptive effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
Classifications
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- 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
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- 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
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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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)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Anchoring section high-elongation shock resistance anchor pole, including a round steel pipe, one conical end, upper bolt and lower bolt, the excircle of round steel pipe is cylindrical structure, the inner hole of round steel pipe is thick in upper port, the thin conical structure of lower port, the shape of conical end is thick in upper end, the thin conical structure in lower end, conical end is extend into round steel pipe and the two is interference fitted, the top and bottom of conical end offer thread groove and lower thread groove, the lower end of upper bolt is protruded into and is threaded in thread groove, the upper end of lower bolt is protruded into and is threaded in lower thread groove；The invention also discloses the shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole；The configuration of the present invention is simple is practical, novel and unique, have many advantages, such as to be not susceptible to that deformation unloading or fracture, adaptive deformation ability is strong, can persistently allow pressure, easy for installation, the support cost for reducing mine deep bump tunnel improves the safety coefficient of mining production work.
Description
Technical field
The invention belongs to mine safeties to produce support apparatus technical field, and in particular to a kind of anchoring section high-elongation anti-impact
Hit anchor pole and its anchoring process.
Background technique
The mine motive forces disaster such as bump and coal and gas prominent is the disaster encountered in mining process, thus
The impact failure caused by roadway surrounding rock is to influence one of the critical issue of mine safety.Anchor pole is easy for installation, at low cost because of its
The advantages that honest and clean is all the supporting roadway surrounding rock equipment being widely used in mine safety production all the time.Currently, suspension roof support is
As the safe and efficient main support pattern of coal mine roadway, it is widely applied in China's mine laneway.
With gradually increasing for mining depth, geological conditions becomes increasingly complex, roadway surrounding rock also usually show high stress,
The features such as large deformation, and existing conventional anchor pole shock resistance is limited, is difficult to play supporting to country rock under thump effect
Effect, once the deformation of roadway surrounding rock can exceed that the range that anchor pole can bear, it will it is generated because of the failure of support apparatus
Accident causes heavy losses to enterprise to cause to seriously threaten to mining safety.In actual engineering, anchor pole is common
Failure mode mainly has that failure by shear of the anchor pole at sliding surface or at joint plane, Rock And Soil are destroyed and the tension of anchor pole is held
It carries and is destroyed caused by power deficiency.The main reason for anchor pole fails is: anchor pole is pulled off the faying face of destruction, reinforcing bar and grouting body
The destruction of bond damage, the faying face bond damage of grouting body and Rock And Soil and the body that is in the milk.Conventional anchor pole reinforcing bar itself prolongs
It is low to stretch rate, large deformation can not be generated.When tunnel occurs rock burst or encounters impact load, conventional anchor pole can not be produced because of itself
Raw large deformation be unable to country rock compatible deformation, this often leads to, and anchor pole is pulled off or reinforcing bar is drawn out.In short, conventional anchor
Bar because can not suitable for surrounding rock large deformation and can not absorb impact load energy and be easy failure, so as to cause entire prop
System's failure, jeopardizes the safety in production of worker.
Summary of the invention
The present invention in order to solve shortcoming in the prior art, provide a kind of anchoring section high-elongation shock resistance anchor pole and
Its anchoring process, have be not susceptible to deformation unloading or fracture, adaptive deformation ability is strong, can persistently allow pressure, structure it is simple,
The advantages that easy for installation, can reduce the support cost in mine deep bump tunnel, and the safety of mining production work can be improved
Coefficient overcomes the defect of the prior art, guarantees the validity and safety of deep laneway surrounding rock suspension roof support, improves to mine
The further investigation of bump in deep part roadway surrounding rock anchor rod supporting theory is horizontal, it is ensured that mine timbering is safe and reliable.
In order to solve the above technical problems, the present invention adopts the following technical scheme: anchoring section high-elongation shock resistance anchor pole, packet
Including a round steel pipe, a conical end, upper bolt and lower bolt, the excircle of round steel pipe is cylindrical structure, round steel pipe
Inner hole in upper port is thick, lower port is thin conical structure, the shape of conical end is in the cone that upper end is thick, lower end is thin
Structure, the hole taper of round steel pipe is identical as conical end excircle taper, and conical end is extend into round steel pipe and two
Person's interference fit, the top and bottom of conical end offer thread groove and lower thread groove, and the lower end of upper bolt is protruded into
And be threaded in thread groove, the upper end of lower bolt is protruded into and is threaded in lower thread groove.
The external peripheral surface of round steel pipe is provided with several hangnails, and the upper end of each hangnail is fixedly connected in round steel pipe
External peripheral surface, the radial direction of the lower end edge round steel pipe of each hangnail, which is flared out, to be obliquely installed, and all hangnails are circumferentially square
To being evenly arranged.
The upper end outer circle portion of round steel pipe be threaded with by conical end upper end press contact top cover, round steel pipe it is interior
The internal diameter of hole lower port, the internal diameter of top cover, the outer diameter of upper bolt and lower bolt outer diameter size it is consistent.
The shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole, comprising the following steps:
(1) upper bolt, lower bolt, round steel pipe and conical end are made；
(2) conical end is encased in round steel pipe, is interference fitted round steel inside pipe wall and the excircle of conical end；
(3) lower end of upper bolt is protruded into and is threaded in upper thread groove, the upper end of lower bolt is protruded into and is threadedly coupled
In lower thread groove；
(4) upper top cover is covered by upper bolt upper end, top cover is threadedly coupled to round steel pipe upper end；
(5) drilling anchor solid hole at the roadway surrounding rock to need reinforcement is beaten anchoring section high-elongation shock resistance anchor pole using roof-bolter
Enter into anchor hole, injects Anchor Agent, hangnail is combined closely with Anchor Agent keeps round steel pipe fixed, finally installs pallet, anchor
Gu operation is completed；
(6) tunnel occurs rock burst or in the case where encountering impact load during anchoring support, roadway surrounding rock can generate compared with
Large deformation, upper bolt and lower bolt are by biggish pulling force, since conical end upper and lower side has been separately connected upper bolt under
Anchor pole, therefore conical end can be slided under the action of the pulling force along the tapered bore of round steel pipe, cause round steel pipe axis
Fission shape is destroyed and absorbs the impact kinetic energy of country rock generation, to weaken injury caused by deep wall rock bump, energy
Enough realize the effective support of HI high impact tendency country rock.
The length of upper bolt and lower bolt is 1100m in step (1), equal in the upper and lower side of upper bolt lower end, lower bolt
Threading.
The round steel that conical end uses a height to be 36mm for 98mm, disc diameter in step (1) is added by draft
Work becomes a conical structure mutually agreed with the inner hole of round steel pipe, then in the upper surface of conical end and lower end surface point
It Jia Gong not upper thread groove and lower thread groove.
The round steel that round steel pipe uses height to be 36mm for 100mm, disc diameter in step (1) passes through draft, in internal shape
At the inner hole of a conical structure, the inner hole upper port diameter of round steel pipe is 32mm, and thick, round steel pipe inner hole lower port is thin
The diameter of conical structure and the outer diameter of upper bolt are consistent.
By adopting the above technical scheme, working principle of the present invention is as follows:
The object of the invention is to which rock burst occurs in tunnel or in the case where encounter impact load, by conical end along
The tapered bore sliding of round steel pipe causes round steel pipe axis to split large deformation destruction, absorbs the impact energy that country rock generates, while can
So that country rock generates moderate finite deformation, reduce harm caused by deep wall rock bump.Round steel pipe is matched with conical end
Self structure advantage can be utilized to the greatest extent with the effective support for absorbing impact kinetic energy to realize HI high impact tendency country rock by closing
A large amount of impact energy is absorbed and consumed, ensure that anchor bar body and pallet are unlikely to damage easily when absorbing impact, so that whole
A anchor rod device is able to bear bigger impact force, and the deformation of adaptive country rock is completed with achieving the purpose that anchor pole effective support
Maltilevel security supporting to country rock.
Round steel pipe external surface of structural member in the present invention is provided with a circle hangnail, for increasing frictional resistance, prevents round steel here
Pipe component falls off from anchor hole, enhances anchoring effect.
Top cover in the present invention plays the conical end axial movement of restriction, and is threadedly coupled and is integrated with round steel pipe, makes
Conical end can drive round steel pipe generation axis to split destruction when moving axially by top cover.
In conclusion the configuration of the present invention is simple is practical, novel and unique, has and be not susceptible to deformation unloading or fracture, adapt to
Deformability is strong, can persistently allow pressure, it is easy for installation the advantages that, reduce the support cost in mine deep bump tunnel,
The safety coefficient for improving mining production work overcomes the defect of the prior art, guarantees deep laneway surrounding rock suspension roof support
Validity and safety, the further investigation improved to mine deep bump roadway surrounding rock anchor rod supporting theory are horizontal, it is ensured that
Mine timbering is safe and reliable.
Detailed description of the invention
Fig. 1 is shape three-dimensional structure diagram of the invention.
Fig. 2 is the axial section of present invention part.
Fig. 3 is the three-dimensional structure diagram of round steel pipe of the invention.
Fig. 4 is the axial section of round steel pipe of the invention.
Fig. 5 is the three-dimensional structure diagram of conical end of the invention.
Fig. 6 is conical end axial section of the invention；
Fig. 7 is the three-dimensional structure diagram of top cover of the invention.
Specific embodiment
As shown in Fig. 1-Fig. 7, anchoring section high-elongation shock resistance anchor pole of the invention, including 1, circle of a round steel pipe
Cone-shaped end 2, upper bolt 3 and lower bolt 4, the excircle of round steel pipe 1 are cylindrical structure, and the inner hole of round steel pipe 1 is in upper port
Slightly, the thin conical structure of lower port, the shape of conical end 2 is in the conical structure that upper end is thick, lower end is thin, round steel pipe 1
Hole taper it is identical as conical 2 excircle taper of end, conical end 2 is extend into round steel pipe 1 and the two interference is matched
It closes, the top and bottom of conical end 2 offer thread groove 5 and lower thread groove 6, and the lower end of upper bolt 3 is protruded into and spiral shell
Line is connected in thread groove 5, and the upper end of lower bolt 4 is protruded into and is threaded in lower thread groove 6.
The external peripheral surface of round steel pipe 1 is provided with several hangnails 7, and the upper end of each hangnail 7 is fixedly connected in round steel
The external peripheral surface of pipe 1, the radial direction of the lower end edge round steel pipe 1 of each hangnail 7, which is flared out, to be obliquely installed, all hangnails 7
It is evenly distributed in the circumferential direction.
The upper end outer circle portion of round steel pipe 1 is threaded with the top cover 8 of conical 2 upper end of end press contact, round steel pipe 1
Inner hole lower port internal diameter, the internal diameter of top cover 8, the outer diameter of upper bolt 3 and lower bolt 4 outer diameter size it is consistent.
The shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole, comprising the following steps:
(1) upper bolt 3, lower bolt 4, round steel pipe 1 and conical end 2 are made；
(2) conical end 2 is encased in round steel pipe 1, matches 1 inner wall of round steel pipe and the excircle interference of conical end 2
It closes；
(3) lower end of upper bolt 3 is protruded into and is threaded in upper thread groove 5, the upper end of lower bolt 4 is protruded into and screw thread connects
It connects in lower thread groove 6；
(4) upper top cover 8 is covered by 3 upper end of upper bolt, top cover 8 is threadedly coupled to 1 upper end of round steel pipe；
(5) drilling anchor solid hole at the roadway surrounding rock to need reinforcement is beaten anchoring section high-elongation shock resistance anchor pole using roof-bolter
Entering into anchor hole, injects Anchor Agent, hangnail 7 is combined closely with Anchor Agent keeps round steel pipe 1 fixed, pallet is finally installed,
Operation is anchored to complete；
(6) tunnel occurs rock burst or in the case where encountering impact load during anchoring support, roadway surrounding rock can generate compared with
Large deformation, upper bolt 3 and lower bolt 4 are by biggish pulling force, since conical 2 upper and lower side of end has been separately connected upper bolt 3
With lower bolt 4, therefore conical end 2 can be slided under the action of the pulling force along the tapered bore of round steel pipe 1, cause to justify
1 axis of steel pipe fission shape is destroyed and absorbs the impact kinetic energy of country rock generation, to weaken caused by deep wall rock bump
Injury can be realized the effective support of HI high impact tendency country rock.
The length of upper bolt 3 and lower bolt 4 is 1100m in step (1), 3 lower end of upper bolt, lower bolt 4 up and down
Hold equal threading.
The round steel that conical end 2 uses a height to be 36mm for 98mm, disc diameter in step (1) is added by draft
Work becomes a conical structure mutually agreed with the inner hole of round steel pipe 1, then in the upper surface and lower end surface of conical end 2
Upper thread groove 5 and lower thread groove 6 are processed respectively.
The round steel that round steel pipe 1 uses height to be 36mm for 100mm, disc diameter in step (1) passes through draft, in internal shape
At the inner hole of a conical structure, the inner hole upper port diameter of round steel pipe 1 is 32mm, thick, the inner hole lower port of round steel pipe 1 is thin
Conical structure diameter it is consistent with the outer diameter of upper bolt 3.
The object of the invention is to pass through conical end in the case where tunnel occurs rock burst or encounters impact load
2 cause 1 axis of round steel pipe to split large deformation along the tapered bore sliding of round steel pipe 1 destroys, absorbs the impact energy that country rock generates,
Country rock can be made to generate moderate finite deformation simultaneously, reduce harm caused by deep wall rock bump.Round steel pipe 1 and conical end
First 2 cooperation can utilize to the greatest extent itself with the effective support for absorbing impact kinetic energy to realize HI high impact tendency country rock
Structural advantage absorbs and consumes a large amount of impact energy, ensure that anchor bar body and pallet are unlikely to damage easily when absorbing impact
Bad, so that entire anchor rod device is able to bear bigger impact force, the deformation of adaptive country rock is to reach anchor pole effective support
Purpose completes the maltilevel security supporting to country rock.
1 external surface of structural member of round steel pipe in the present invention is provided with a circle hangnail 7, anti-to justify here for increasing frictional resistance
1 component of steel pipe falls off from anchor hole, enhances anchoring effect.
Top cover 8 in the present invention plays the conical end 2 of restriction and moves axially, and is integrated with round steel pipe 1, makes cone
End 2 can drive the generation axis of round steel pipe 1 to split destruction when moving axially by top cover 8.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (7)
1. anchoring section high-elongation shock resistance anchor pole, it is characterised in that: including a round steel pipe, conical an end, upper anchor
Bar and lower bolt, the excircle of round steel pipe are cylindrical structure, and the inner hole of round steel pipe is in the cone that upper port is thick, lower port is thin
Structure, the shape of conical end is in the conical structure that upper end is thick, lower end is thin, the hole taper of round steel pipe and conical end
Excircle taper is identical, and conical end is extend into round steel pipe and the two is interference fitted, the top and bottom of conical end
Offer thread groove and lower thread groove, the lower end of upper bolt is protruded into and is threaded in thread groove, lower bolt it is upper
End is protruded into and is threaded in lower thread groove.
2. anchoring section high-elongation shock resistance anchor pole according to claim 1, it is characterised in that: the outer circle weekly form of round steel pipe
Face is provided with several hangnails, and the upper end of each hangnail is fixedly connected with the external peripheral surface in round steel pipe, under each hangnail
It holds the radial direction along round steel pipe to be flared out to be obliquely installed, all hangnails are evenly distributed in the circumferential direction.
3. anchoring section high-elongation shock resistance anchor pole according to claim 2, it is characterised in that: the upper end outer circle of round steel pipe
Portion is threaded with the top cover of conical end upper end press contact, the internal diameter of the inner hole lower port of round steel pipe, top cover it is interior
The size of the outer diameter of diameter, the outer diameter of upper bolt and lower bolt is consistent.
4. using the shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole as claimed in claim 3, it is characterised in that:
The following steps are included:
(1) upper bolt, lower bolt, round steel pipe and conical end are made；
(2) conical end is encased in round steel pipe, is interference fitted round steel inside pipe wall and the excircle of conical end；
(3) lower end of upper bolt is protruded into and is threaded in upper thread groove, the upper end of lower bolt is protruded into and is threadedly coupled
In lower thread groove；
(4) upper top cover is covered by upper bolt upper end, top cover is threadedly coupled to round steel pipe upper end；
(5) drilling anchor solid hole at the roadway surrounding rock to need reinforcement is beaten anchoring section high-elongation shock resistance anchor pole using roof-bolter
Enter into anchor hole, injects Anchor Agent, hangnail is combined closely with Anchor Agent keeps round steel pipe fixed, finally installs pallet, anchor
Gu operation is completed；
(6) tunnel occurs rock burst or in the case where encountering impact load during anchoring support, roadway surrounding rock can generate compared with
Large deformation, upper bolt and lower bolt are by biggish pulling force, since conical end upper and lower side has been separately connected upper bolt under
Anchor pole, therefore conical end can be slided under the action of the pulling force along the tapered bore of round steel pipe, cause round steel pipe axis
Fission shape is destroyed and absorbs the impact kinetic energy of country rock generation, to weaken injury caused by deep wall rock bump, energy
Enough realize the effective support of HI high impact tendency country rock.
5. the shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole according to claim 4, it is characterised in that:
The length of upper bolt and lower bolt is 1100m in step (1), processes outer spiral shell in the upper and lower side of upper bolt lower end, lower bolt
Line.
6. the shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole according to claim 4, it is characterised in that:
The round steel that conical end uses a height to be 36mm for 98mm, disc diameter in step (1) is processed into one by draft
Then the conical structure that a inner hole with round steel pipe mutually agrees with is processed respectively in the upper surface of conical end and lower end surface
Thread groove and lower thread groove.
7. the shock resistance anchoring process of anchoring section high-elongation shock resistance anchor pole according to claim 4, it is characterised in that:
The round steel that round steel pipe uses height to be 36mm for 100mm, disc diameter in step (1) passes through draft, forms a circle in inside
The inner hole of pyramidal structure, the inner hole upper port diameter of round steel pipe are 32mm, the thin cone knot of thick, round steel pipe inner hole lower port
The diameter of structure and the outer diameter of upper bolt are consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100026.8A CN109057843B (en) | 2018-09-20 | 2018-09-20 | High-elongation impact-resistant anchor rod of anchoring section and anchoring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100026.8A CN109057843B (en) | 2018-09-20 | 2018-09-20 | High-elongation impact-resistant anchor rod of anchoring section and anchoring method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109057843A true CN109057843A (en) | 2018-12-21 |
| CN109057843B CN109057843B (en) | 2023-10-03 |
Family
ID=64763391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811100026.8A Active CN109057843B (en) | 2018-09-20 | 2018-09-20 | High-elongation impact-resistant anchor rod of anchoring section and anchoring method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109057843B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431623A (en) * | 2020-10-26 | 2021-03-02 | 河南理工大学 | Multistage energy-absorbing anchor rod and construction method thereof |
| CN113874171A (en) * | 2019-04-15 | 2021-12-31 | 因温特奥股份公司 | Installation tool and method for hammering a rock bolt into a borehole |
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| CN112431623A (en) * | 2020-10-26 | 2021-03-02 | 河南理工大学 | Multistage energy-absorbing anchor rod and construction method thereof |
| CN112431623B (en) * | 2020-10-26 | 2022-10-04 | 河南理工大学 | Multistage energy-absorbing anchor rod and construction method thereof |
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| CN109057843B (en) | 2023-10-03 |
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