Multi-section anchoring energy dissipation yielding anchor rod for rockburst and anchoring method

Abstract

The invention discloses a multi-section anchoring energy dissipation yielding anchor rod for rockburst and an anchoring method. The anchor rod aims to effectively release elastic energy of surroundingrock in a high ground stress environment, avoid disasters such as the rockburst and effectively avoid the problems of anchor disengaging, pulling out, snapping and the like of the anchor rod, so thatthe stability of the tunnel surrounding rock is improved, and the construction safety is guaranteed. A rod body is sleeved with at least two longitudinally-spaced yielding sleeves; the yielding sleeves are tightly fixed to the rod body through rubber rings at the two ends; annular serrated knives connected with the yielding sleeves in a welded mode are arranged on the outer walls of the yieldingsleeves at intervals in the longitudinal direction; the outer diameters of the annular serrated knives are matched with the hole diameters of stress release holes; a plurality of sets of front anchoring blocks and rear anchoring blocks are welded to the inner walls of the yielding sleeves at intervals in the longitudinal direction; middle anchoring blocks are welded to the portions, between the front anchoring blocks and the rear anchoring blocks, of the rod body; and elastic bodies are arranged among the middle anchoring blocks and the corresponding end faces of the front anchoring blocks andthe rear anchoring blocks.

Description

technical field [0001] The invention relates to a rockburst support bolt, in particular to a multi-stage anchorage anchorage and an anchorage method aimed at rockburst. Background technique [0002] With the rapid development of my country's transportation infrastructure construction, the characteristics of underground engineering "long, large, deep, and group" have become increasingly prominent, and a large number of long railways, highway tunnels and hydraulic tunnels passing through high ground stress conditions have appeared, resulting in There are many problems in deep rock mechanics, among which rockburst is the most prominent. Rockburst is generally considered to be the process of underground engineering excavation under high ground stress conditions. The hard and brittle surrounding rock is excavated and unloaded, which leads to the stress differentiation of the tunnel wall, and the elastic strain energy stored in the rock mass is suddenly released, resulting in blast...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a multi-stage anchoring energy-dissipating bolt for rockbursts, so as to effectively release the elastic energy of the surrounding rock in a high ground stress environment, avoid rockbursts and other disasters, and effectively avoid Anchor bolts will be unanchored, pulled out and broken, so as to improve the stability of the surrounding rock of the tunnel and ensure the safety of construction

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