Recyclable impact-resistant multi-stage yielding device and method

Abstract

The recoverable impact-resistant multi-stage yielding device comprises a slow-release resistance-increasing part, the slow-release resistance-increasing part comprises a sealed container connected with a tray into a whole, the section of the sealed container is of an annular structure, the sealed container is provided with a pressure release valve, the sealed container is filled with compressible gas to serve as a resistance-increasing medium, a piston is arranged in the sealed container, and the pressure release valve is arranged in the piston; the anchor rod is located outside the surrounding rock, penetrates through the sealed container and the inner diameter of the piston and is connected with the timely yielding component. The timely yielding component comprises at least one elastic piece, one end of the elastic piece is connected with the piston of the slow-release resistance-increasing component, the other end of the elastic piece is connected with a limiting piece which is connected to the anchor rod in a sliding mode, and the elastic piece is fixedly connected with the anchor rod through a fastening piece; the elastic resistance of the elastic piece is smaller than the resistance of the slow-release resistance-increasing component. And the elastic part of the timely yielding part is arranged to be fixed by a fastener after being compressed for a stroke when the multi-stage yielding device is connected with the anchor rod.

Description

technical field [0001] The invention belongs to the field of surrounding rock support control for mine roadways, and is suitable for the support of roadways in areas where large deformations are easy to occur, soft and cracked surrounding rocks, mine pressure is strong, and rock burst is affected. Give pressure device and method. Background technique [0002] In geotechnical engineering and underground engineering, bolt support has been widely used. The traditional pressure bolt can effectively prevent the loosening and damage of the surrounding rock through the interaction with the surrounding rock of the roadway, and is an effective support method for maintaining the stability of the surrounding rock of the roadway. However, as the mining depth continues to increase, the roadway surrounding rock presents the characteristics of high ground stress, large plastic deformation, and long deformation duration. Especially when it is affected by dynamic disasters such as mining di...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when the traditional support yielding tray is subjected to reciprocating load and impact load, the deformation energy suddenly accumulated inside the surrounding rock cannot be consumed through effective pressure yielding, resulting in bolt breakage, surrounding rock slab side, roof fall, etc. phenomenon, provide a recyclable impact-resistant multi-stage pressure relief device and method, which can effectively improve the surrounding rock support system and ensure the life safety of underground operators

Images