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Anchor pipe cable supporting structure capable of bearing lateral shear force

A supporting structure and transverse shearing technology, which is applied in the installation of anchor rods, mining equipment, earthwork drilling and mining, etc., can solve the problems of excessive deformation of surrounding rock, shearing and pulling of anchor rods and cables, etc., and achieves remarkable results. Obvious effect

Active Publication Date: 2014-08-06
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the free end of this kind of anchor cable does not directly interact with the surrounding rock, the utilization rate of the entire anchor cable is affected. The anchor cable is prone to shear failure, and the transverse shear force received here is not evenly distributed to a certain length of the anchor cable, and due to the structural characteristics of the anchor cable, its lateral restraint effect on the surrounding rock is not obvious
[0003] Although the roadway bolt (cable) support technology is becoming more and more mature, but in the roadway support of high-stress weak surrounding rock, there are still phenomena such as excessive deformation of the surrounding rock, shearing and pulling of the bolt and anchor cable.

Method used

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  • Anchor pipe cable supporting structure capable of bearing lateral shear force
  • Anchor pipe cable supporting structure capable of bearing lateral shear force
  • Anchor pipe cable supporting structure capable of bearing lateral shear force

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specific Embodiment approach

[0013] The anchor cable support structure capable of bearing transverse shearing force of the present invention, its preferred specific embodiment is:

[0014] After drilling on the surrounding rock, ream the part near the outer end of the hole, install a slotted steel pipe at the reamed part, and install a resin end anchor cable in the inside of the hole and in the slotted steel pipe.

[0015] The slit steel pipe is fully slit along the longitudinal direction.

[0016] A necking is provided at the head end of the slotted steel pipe.

[0017] The slotted steel pipe is made of 16Mn steel, the outer diameter of the tail end is 33mm, the outer diameter of the head end is 29mm, the length is 1.2-2.5m, the seam width is 12mm, and the wall thickness is 1.5mm.

[0018] The anchor cable anchored at the resin end has a diameter of 21.6mm and a length of 7-10m.

[0019] The outer end of the anchor cable anchored by the resin end is provided with an anchor cable lock and an anchor cabl...

specific Embodiment

[0025] Such as figure 2 As shown, after the excavation of the coal mine roadway, the roof of the roadway is now used as the support object, and the roof is supported by using the present invention and its support method instead of the conventional anchor cable. Firstly, the slotted steel pipe is installed, and then the resin end anchoring anchor cable is installed. .

[0026] Install slotted steel pipe:

[0027] Ordinary single rock bolter with hollow hexagonal extended drill pipe and φ28mm double-wing drill bit is used for drilling, and φ32mm double-wing drill bit is used for reaming. First, use a φ28 double-wing drill bit to drill a hole. The drilling depth is 7-10m. This length is the length of the anchor cable at the end of the resin to be installed. In order to ensure the accuracy of the hole depth, you can mark the end hole with white or yellow paint on the starting drill pipe. Location. When using a φ32mm double-wing drill bit for reaming, the reaming depth is the l...

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Abstract

The invention discloses an anchor pipe cable supporting structure capable of bearing lateral shear force. After a surrounding rock is drilled, the portion, close to the outer end, of a hole is reamed, a slotted steel tube is installed at the reamed portion, and an anchor cable with the ends anchored by resin is installed in the hole and the slotted steel tube. The effect of supporting the surrounding rock of a roadway is obvious, and the effect of resisting lateral deformation, along the structure, of the surrounding rock of the roadway is remarkable. The anchor pipe cable supporting structure is suitable for the roadway or a tunnel with the layered rock stratum surrounding rock which is heavily stressed, weak, broken and large in lateral deformation.

Description

technical field [0001] The invention relates to a roadway anchor cable support technology, in particular to an anchor cable support structure capable of bearing transverse shear force. Background technique [0002] The resin end anchoring anchor cable is a type of anchor cable that uses a resin drug coil to anchor the end of the anchor cable. Since the free end of this kind of anchor cable does not directly interact with the surrounding rock, the utilization rate of the entire anchor cable is affected. The anchor cable is prone to shear failure, and the transverse shear force received here is not evenly distributed to a certain length of anchor cable, and due to the structural characteristics of the anchor cable, its lateral restraint effect on the surrounding rock is not obvious. [0003] Although the roadway bolt (cable) support technology is becoming more and more mature, but in the roadway support of high-stress weak surrounding rock, there are still phenomena such as e...

Claims

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Application Information

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IPC IPC(8): E21D20/00
Inventor 单仁亮陶宇孔祥松黄博
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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