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Broaching Anti-rock Burst Anchor

An anti-rockburst and bolt technology, applied in the installation of bolts, sheet pile walls, mining equipment, etc., can solve the problems of cutting chips, affecting the balance distribution of resistance, unable to pull out, etc., to achieve the effect of simple structure

Inactive Publication Date: 2017-07-28
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defect of this product is: when the tool continuously cuts the large outer diameter section of the main body of the anchor rod / anchor cable, chips will be generated, which may affect the balanced distribution of resistance, and even fail to pull out

Method used

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  • Broaching Anti-rock Burst Anchor
  • Broaching Anti-rock Burst Anchor
  • Broaching Anti-rock Burst Anchor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0025] The broaching anti-rockburst bolt shown in the figure includes an observation pole 1, an anchor nut 2 and an anti-rockburst device 3, wherein the anti-rockburst device 3 includes a casing 4 and a broaching body 5, and the outer wall of the casing 4 The left end is connected with the anchor nut 2, and the right end of the sleeve pipe 4 is threadedly connected with a water stop nut 6, and the joint between the water stop nut 6 and the sleeve pipe 4 is provided with a water stop rubber ring 6.1, so as not to penetrate into the sleeve pipe 4 and corrode the sleeve pipe 4. Inside the casing 4, from left to right, there are threaded section 4.1, tapered broach placement section 4.2, and cutting guide section 4.3. The threaded section 4.1 is connected with a closed bolt 7, and a round hole is reserved in the center of the closed bolt 7 , it...

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Abstract

The invention relates to a broaching anti-rockburst bolt, which includes an anchor nut for an observation pole and an anti-rockburst device. The anti-rockburst device includes a casing and a broaching body. The left end of the outer wall of the casing is connected to the anchor nut. The right end of the casing is connected with a water-stop nut. Inside the casing, from left to right, there are a threaded section, a tapered broach placement section, and a cutting guide section. The threaded section is connected with a closing bolt. The cutting guide section is provided with radial chip pockets and guide grooves; the broaching body includes a cutter bar with the left end inserted in the casing, and broaches and guide keys are distributed on the outer wall of the left end of the cutter bar along the circumferential direction. , the broach corresponds to the chip flute, the guide key corresponds to the guide groove, and one end of the observation pole passes through the closed bolt and is connected to the cutter bar. The bolt has a simple structure, is safe, is easy to process and manufacture, can produce large deformation instantly, can provide continuous and constant deformation resistance, has strong impact resistance and high reliability.

Description

technical field [0001] The invention relates to the field of geotechnical engineering anchoring support, in particular to the field of rockburst prevention and control. Specifically, it refers to a broaching type anti-rockburst bolt which is suitable for surrounding rock support threatened by rockburst and has practical significance for effectively preventing damage caused by rockburst. Background technique [0002] Rockburst is a phenomenon of dynamic instability induced by certain factors after excavation and unloading of hard and brittle surrounding rock with complete structure under high ground stress conditions, which often causes catastrophic damage to underground engineering. Frequent occurrence is a major engineering disaster recognized by rock mechanics and engineering circles. Research on rockburst control technology is the ultimate goal, which is to propose prevention and control measures for the possibility and intensity of rockburst and its impact on the projec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E02D5/74
Inventor 刘士雨冯夏庭陈炳瑞郑虹
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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