End anchoring enhanced yielding anchor rod device and using method thereof

Abstract

The invention discloses an end anchoring enhanced yielding anchor rod device and a using method thereof, and belongs to the technical field of geotechnical engineering supporting. The anchor rod device comprises an anchor rod, a tray, a series compression spring, a circular damping guide rail, an elastic resin energy absorption ball, a cement cartridge, a sliding type annular needle, an excitationfiring pin and a gas generator, internal and external cooperative deformation compression is conducted through the series compression spring and the elastic resin energy absorption ball in the circular damping guide rail, and meanwhile the large-deformation yielding performance and the performance of enhancing the anchoring force of the anchor rod are achieved. When surrounding rock deforms greatly, the series compression spring and the elastic resin energy absorption ball are deformed and yielded, and when the yield process is about to be finished, the excitation firing pin triggers the gasgenerator to push the sliding type annular needle to pierce the cement cartridge, so that the length of an anchoring section is increased, the anchor rod device is suitable for the field of underground engineering supporting with broken surrounding rock and has the advantages of being simple in structure, high in anchoring performance, large in yielding deformation and easy to install.

Description

technical field [0001] The invention relates to a bolt device and a use method thereof, in particular to an end anchoring enhanced yielding pressure bolt device and a use method thereof which are suitable for use in the technical field of underground engineering support for weak and broken surrounding rocks. Background technique [0002] Anchor (cable) is the most basic and most economical and effective support method in the field of geotechnical engineering support. Whether it is permanent support or temporary support of underground engineering, anchor (cable) is important part of the system. As the mining of mineral resources goes deep, the difficulty of surrounding rock support in high ground stress roadways (tunnels) becomes more and more obvious, and accidents such as surrounding rock collapse and roof fall occur frequently. Challenges require more reasonable and scientific support technology to solve these problems. [0003] The basic components of the anchor (cable)...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The present invention provides an end-anchor enhanced yielding anchor device and its use method, which not only has the function of large deformation yielding, but also has the function of expanding the anchoring section twice to solve the problem of existing yielding anchors. The rod device is used to deal with the problem of insufficient anchoring force in the weak and broken surrounding rock underground engineering

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