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Anchor cable support structure capable of bearing transverse shear force

A supporting structure and transverse shearing technology, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of excessive deformation of surrounding rock, shearing of bolts and cables, and affecting the utilization rate of anchor cables, etc., to achieve a noticeable effect, a noticeable effect

Inactive Publication Date: 2016-03-02
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 cable support structure capable of bearing transverse shear force
  • Anchor cable support structure capable of bearing transverse shear force
  • Anchor cable support structure capable of bearing transverse shear force

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specific Embodiment approach

[0013] The preferred specific implementation of the anchor pipe supporting structure capable of bearing the transverse shear force of the present invention is:

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

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

[0016] The head end of the slotted steel pipe is provided with a necking.

[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 slit width is 12mm, and the wall thickness is 1.5mm.

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

[0019] An anchor cable lock and an anchor cable tray are provided at the outer end of the resin end anchoring the anchor cable.

[0020] S...

specific Embodiment

[0025] Such as figure 2 As shown, after the excavation of the coal mine roadway, the roadway roof is now used as the support object. The present invention and its supporting method are used to replace the conventional anchor cable to support the roof. First install the slotted steel pipe, and then install the resin end anchor cable .

[0026] Install slotted steel pipe:

[0027] Use ordinary single-piece bolting rig with hollow hexagonal long drill pipe and φ28mm double-wing drill bit for drilling, and φ32mm double-wing drill bit for reaming. First, use a φ28 double-wing drill bit to drill the hole. The depth of the hole is 7-10m. This length is the length of the anchor cable at the end of the resin to be installed. To ensure the accuracy of the hole depth, the final hole can be marked with white or yellow paint on the starting drill pipe position. When reaming with a φ32mm double-wing drill bit, the reaming depth is the length of the slotted steel pipe to be installed +150mm. ...

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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 an anchor pipe and cable support technology for roadways, in particular to an anchor pipe and cable support structure capable of bearing lateral shearing force. Background technique [0002] Resin end anchorage cable is a type of anchor cable that uses resin cartridges to anchor the ends of the anchor cable. Because the free end of this kind of anchor cable does not directly interact with the surrounding rock well, it affects the utilization rate of the entire anchor cable, and when the surrounding rock undergoes large lateral displacement and deformation, the rock layer of the surrounding rock of the roadway is dislocated. The anchor cable is prone to shear failure. The lateral shear force received here is not evenly distributed to the anchor cable of a certain length, and due to the structural characteristics of the anchor cable, its lateral restraint effect on the surrounding rock is not obvious. [0003] Although roadway bolt (ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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