Self-adaption decompression type grouting anchor rod

Abstract

The invention discloses a self-adaption decompression type grouting anchor rod and solves the problem in the prior art that the reinforcing capacity of the anchor rod remains to be improved. The self-adaption decompression type grouting anchor rod comprises an anchor rod body, a self-adaption locking device, a grouting hole, a pulp stopping plug, a pulp stopping plug base plate, a fastening nut and a pulp blocking plug, wherein the anchor rod body is of a hollow pipe and is connected in the self-adaption locking device in a sleeving manner; the grouting hole is formed in the side wall, connected in rock in a sleeving manner, of the anchor rod body; one side, stretching out of the rock, of the anchor rod body penetrates through the pulp stopping plug and the middle of the pulp stopping plugbase plate, is connected with the self-adaption locking device in a sleeving manner, and is fixedly connected through the fastening nut; the pulp stopping plug is arranged at the end part of the anchor rod body; and the self-adaption locking device comprises a locking wedge mechanism, an upper sleeve, an isolating rubber ring, a positioning lower sleeve, a pulp stopping plug nut, a screw mat anda spring. According to the self-adaption decompression type grouting anchor rod, the upper sleeve decompress the anchor rod body through cutting a bulge, and the anchor rod body unloads the bulge beforehand, so that large deformation of surrounding rock is effectively controlled, the anchoring efficiency is improved, and the requirement of the anchor rod supporting technology in deep geotechnicalengineering is met.

Description

technical field [0001] The invention relates to the field of reinforcement and protection in geotechnical engineering, in particular to an adaptive pressure relief grouting bolt. Background technique [0002] With the increasing mining depth of global mineral resources, various engineering geological disasters are increasing, such as mine rock burst and large deformation of soft rock, which pose a huge threat to the safe and efficient mining of deep resources. The roadway supported by traditional bolts is far from being able to resist the instantaneous large deformation impact load caused by rockburst, resulting in accidents of bolt breakage and roadway damage. [0003] At present, in the support of underground engineering, the weak roof of the roadway is usually suspended in the upper stable rock layer by means of bolts. The anchoring of the ends of the bolts in the project is mostly anchored with resin anchoring agent, but with the increase of the service life of the roadw...

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the problem that the bolt reinforcement capacity needs to be improved in the prior art, and provides a self-adaptive pressure relief grouting bolt with reasonable structure and good reinforcement effect

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