CN107514272B - Anchor rod lasso for supporting staggered bedding development surrounding rock - Google Patents
Anchor rod lasso for supporting staggered bedding development surrounding rock Download PDFInfo
- Publication number
- CN107514272B CN107514272B CN201610422752.6A CN201610422752A CN107514272B CN 107514272 B CN107514272 B CN 107514272B CN 201610422752 A CN201610422752 A CN 201610422752A CN 107514272 B CN107514272 B CN 107514272B
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- China
- Prior art keywords
- anchor rod
- anchor
- hole
- rod
- limit stop
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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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)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses an anchor rod lasso for supporting staggered bedding developing surrounding rock, which comprises a hollow anchor rod (1), an anchor cable (2) and a limit stop block (3); the hollow anchor rod (1) is internally provided with a large hole (12), a small hole (13) and a limit step (11) formed by the large hole (12) and the small hole (13), and the large hole (12) is positioned in an anchoring section of the hollow anchor rod (1); the limit stop block (3) is fixedly connected with one end of the anchor cable (2); the anchor cable (2) passes through the big hole (12) and the small hole (13); the limit stop (3) is limited in the large hole (12) by the limit step (11). The anchor rod has good anti-shearing effect, when the rod body of the anchor rod is sheared, the anchoring end of the anchor rod is still effective, the limit stop block in the anchor rod is limited and fixed by the limit step, and the anchor cable is not easy to shear because the anti-shearing capability of the anchor cable is stronger than that of the anchor rod, and can continuously play a role in supporting the surrounding rock or the side slope.
Description
Technical Field
The invention relates to an anchor rod lasso, in particular to an anchor rod lasso for supporting staggered bedding developing surrounding rocks, and belongs to the field of supporting devices.
Background
The anchor bolt support is a reinforcing support mode adopted in surface engineering such as side slopes, rock-soil deep foundation pits and the like and underground chamber construction such as tunnels, stopes and the like. The method has the advantages of low cost, good supporting effect, simple and convenient operation, flexible use, less occupied construction clearance and the like.
Staggered layering is a relatively common type of layering, also commonly referred to as bias layering, which is comprised of a series of layers of grains that are skewed at the interfaces of the layers, and the bias layers can be combined in an overlapping, staggered, or cut-away manner.
The traditional anchor bolt support often cannot play a role in supporting surrounding rocks, side slopes and the like which are developed in a staggered bedding manner. This is because, under the action of high structural stress, the hard surrounding rock or slope developed in a staggered bedding manner can be subjected to strong dislocation, and the dislocation can form shearing action to shear the anchor rod, so that the anchoring action is lost.
Disclosure of Invention
The invention aims to provide an anchor rod lasso for supporting staggered bedding development surrounding rocks, which can still play a supporting role under the conditions that the surrounding rocks or side slopes are dislocated due to the structural stress action and anchor rods are sheared.
In order to achieve the aim, the anchor rod lasso for supporting the surrounding rock roadway with staggered bedding development under high tectonic stress comprises a hollow anchor rod, an anchor cable and a limit stop block; a limiting step is arranged in the hollow anchor rod, a large hole is formed in the anchoring section of the anchor rod, and a small hole is formed in the free section of the anchor rod; the limit stop block is fixedly connected with one end of the anchor cable; the anchor cable passes through the big hole and the small hole; the limit stop is limited in the large hole by the limit step.
The anchor rod has good anti-shearing effect, when the rod body of the anchor rod is sheared, the anchoring end of the anchor rod is still effective, the limit stop block in the anchor rod is limited and fixed by the limit step, and the anchor cable is not easy to shear because the anti-shearing capability of the anchor cable is stronger than that of the anchor rod, and can continuously play a role in supporting the surrounding rock or the side slope. Compared with the common combined support of the anchor rod and the anchor cable, the anchor cable support device does not need to independently punch holes for the anchor cable, and saves working procedures.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1, a hollow anchor rod, 2, an anchor cable, 3, a limit stop, 4, a spring, 11, a limit step, 12, a large hole, 13, a small hole, 14 and a sealing cover.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, an anchor rod lasso for supporting staggered bedding development surrounding rock comprises a hollow anchor rod 1, an anchor cable 2 and a limit stop 3; a limiting step 11 is arranged in the hollow anchor 1, a large hole 12 is formed in the anchoring section of the anchor rod, and a small hole 13 is formed in the free section of the anchor rod; the limit stop 3 is fixedly connected with one end of the anchor cable 2; the anchor cable 2 passes through the big hole 12 and the small hole 13; the limit stop 3 is limited in the large hole 12 by the limit step 11.
During the use, the inside anchor rope 2 reserve length is the elongation when empty anchor rod 1 is pulled apart, and when empty anchor rod 1 was pulled apart, anchor rope 2 can be in the tensioning state in the time of the utmost point short, played the anchor effect.
The anchor rod has good anti-shearing effect, when the rod body of the anchor rod is sheared, the anchoring end of the anchor rod is still effective, the limit stop block in the anchor rod is limited and fixed by the limit step, and the anchor cable is not easy to shear because the anti-shearing capability of the anchor cable is stronger than that of the anchor rod, and can continuously play a role in supporting the surrounding rock or the side slope.
Further, the anchoring end of the hollow anchor rod 1 is provided with a sealing cover 14, and the sealing cover 14 is used for preventing anchoring agent from entering the anchor rod to enable the hollow anchor rod 1 and the anchor cable 2 to be fixed into a whole and lose the effect of the anchor cable 2.
Furthermore, in order to adapt to the occurrence of a large deformation condition, a prestress needs to be given to the anchor cable, a spring 4 is arranged between the limit stop 3 and the limit step 11, the spring 4 is sleeved on the anchor cable 2, and the maximum compression distance of the spring is slightly larger than the elongation of the hollow anchor rod 1 when the hollow anchor rod is broken. When the surrounding rock or the side slope has larger separation and the rod body of the hollow anchor rod 1 is broken, the anchor cable 2 enters a pre-tightening state, and the spring 4 can slowly release the pressure of the rock body to continuously support the surrounding rock.
Claims (2)
1. An anchor rod lasso for supporting staggered bedding development surrounding rock is characterized by comprising a hollow anchor rod (1), an anchor cable (2) and a limit stop block (3); the hollow anchor rod (1) is internally provided with a large hole (12), a small hole (13) and a limit step (11) formed by the large hole (12) and the small hole (13), and the large hole (12) is positioned in an anchoring section of the hollow anchor rod (1); the limit stop block (3) is fixedly connected with one end of the anchor cable (2); the anchor cable (2) passes through the big hole (12) and the small hole (13); the limit stop (3) is limited in the large hole (12) by the limit step (11), a spring (4) is arranged between the limit stop (3) and the limit step (11), the spring (4) is sleeved on the anchor cable (2), and the maximum compression distance of the spring is larger than the elongation of the anchor rod (1) when the anchor rod is broken.
2. A rockbolt lasso for supporting interbedded bedrock according to claim 1, wherein the anchoring end of the hollow rockbolt (1) is provided with a cover (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610422752.6A CN107514272B (en) | 2016-06-16 | 2016-06-16 | Anchor rod lasso for supporting staggered bedding development surrounding rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610422752.6A CN107514272B (en) | 2016-06-16 | 2016-06-16 | Anchor rod lasso for supporting staggered bedding development surrounding rock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107514272A CN107514272A (en) | 2017-12-26 |
| CN107514272B true CN107514272B (en) | 2020-04-10 |
Family
ID=60720735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610422752.6A Active CN107514272B (en) | 2016-06-16 | 2016-06-16 | Anchor rod lasso for supporting staggered bedding development surrounding rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107514272B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425231B (en) * | 2020-03-31 | 2021-03-26 | 中国矿业大学 | Long and short anchor cable coordinated energy absorption yielding device and construction method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2175829Y (en) * | 1993-07-14 | 1994-08-31 | 戴丽珍 | Expasion sleeve bolt |
| CN202431287U (en) * | 2011-12-12 | 2012-09-12 | 中国矿业大学 | Combined telescopic anchor rod |
| CN202810881U (en) * | 2012-09-26 | 2013-03-20 | 山东科技大学 | Novel expandable type yielding prestress grouting anchor cable |
| CN204754958U (en) * | 2015-07-16 | 2015-11-11 | 山东科技大学 | Precast prestressed concrete stock |
| CN105064359A (en) * | 2015-07-18 | 2015-11-18 | 高路恒 | Unbonded prestressed construction anchor rod |
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2016
- 2016-06-16 CN CN201610422752.6A patent/CN107514272B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107514272A (en) | 2017-12-26 |
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