A large deformation self-repairing rockburst resistant bolt

Abstract

The invention discloses a large-deformation self-repairing anti-rockburst anchor rod, which comprises a rod body, a yielding device and a self-repairing device, wherein the yielding device is sheathed on the head end of the rod body; the outer side of the yielding device is provided with an anchoring agent layer; the self-repairing device comprises a casing pipe and an expansion body pipe, wherein the casing pipe and the expansion body pipe are sheathed out of the rod body; the self-repairing device also comprises a piston, a compression bag, a liquid passing pipe and a pressure bearing check valve, wherein A component adhesive is filled in the compression bag is filled with A component adhesive, B component adhesive is filled in the expansion body pipe is filled with B component adhesive, the casing pipe is positioned on the tail end of the yielding device, the expansion body pipe is positioned on the tail end of the casing pipe, the liquid passing pipe is filled arranged inat the end part, which is near the end part of the casing pipe, of the expansion body pipe, the pressure bearing check valve is arranged in the liquid passing pipe, and the piston and the compression bag are independently arranged in the casing pipe. The invention provides the large-deformation self-repairing anti-rockburst anchor rod which has the advantages of a simple structure, safety and easiness in manufacturing and processing, can provide resistance when a large deformation is generated, and realizes the self-repairing of a rock mass fracture.

Description

technical field [0001] The present invention relates to the field of geotechnical engineering anchoring support, in particular to the field of rockburst prevention, and specifically refers to a large rockburst support that is suitable for surrounding rock support threatened by rockbursts and has practical significance for effectively preventing damage caused by rockbursts. Deformation self-repairing rockburst resistant bolt. 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...

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Problems solved by technology

[0004] All of the anchors mentioned above can achieve the effect of yielding pressure. However, after the surrounding rock is deformed, the broken rock mass increases the load of the anchor. The corrosion rate reduces the safety of the support system

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