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Displacement release type anchor head device

A technology of displacement and anchor head, which is used in the installation of bolts, mining equipment, earth-moving drilling, etc.

Inactive Publication Date: 2010-06-09
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention uses a strain relief anchor head to cope with the radial deformation of the anchor rod and the continuous generation and expansion of cracks.

Method used

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Embodiment Construction

[0019] The present invention improves the anchor head part of the anchor rod in the prior art, and adopts a novel anchor head device, which is a stress release device, such as figure 1 As shown, the stress relief device in this embodiment is a displacement stress relief device, and the displacement stress relief device is a component 2 with a bowl-shaped outer edge. There is a circular hole in the middle of the top of the component, and the diameter of the circular hole should be slightly larger than Anchor 1 diameter. When in use, two bowl-shaped components with outer edges form a group, and the two components are buckled together with one positive and one negative bowls facing each other, that is, the outer edges of the components are in contact, and then sleeved on one end of the anchor rod. The components on the outer edge of the bowl-shaped belt are made of low-carbon steel and other materials with good strength, toughness and plasticity, and the strength of a group of st...

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PUM

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Abstract

The invention relates to a displacement release type anchor head device comprising an anchor rod, a loosing ring and a clamp nut. The displacement release type anchor head device is characterized by also comprising a stress release device and a protective device, wherein the stress release device is arranged between the loosing ring and the clamp nut; the protective device is arranged on the periphery of the stress release device; the axial compression strength of the stress release device is lower than that of the anchor rod; and a strain type device is used as the anchor head so that the anchor rod properly internally moves along with a rock mass inside the loosing ring by properly releasing a certain amount of space through the deformation of the anchor head when external force acting on the anchor rod exceeds the self strength of the anchor rod, the anchor rod can still work under the action of ultimate load, and the normal use of a tunnel can be ensured.

Description

technical field [0001] The invention relates to an anchor head device for the roadway structure support of underground excavation engineering, in particular to an anchor head device for the support structure of the deep roadway where the influence of ground stress is relatively large and the mining stress is relatively large. Background technique [0002] At present, the anchor head of roadway support generally adopts traditional anchoring device. According to the type of anchor rod and the anchoring method, the exposed length of the anchor rod is 0.15m; According to the requirements of the tensioning equipment, the exposed length of the anchor cable is generally controlled at about 0.3m. For the thread quenching and tempering treatment of the tail body of the anchor rod, the method of solid-state quenching and metastable phase strengthening is selected. When tempering, it cannot exceed 5000°C, and it is between 200-3000°C, so that the tail thread and the tail rod have the s...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 李世海孟达侯岳峰范永波郑梦雨
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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