Grouting Anchor Cable and Grouting Method in Deep Surrounding Rock of Roadway

Abstract

The invention discloses a deep-shaft surrounding-rock grouting anchor cable and a grouting method thereof. A grouting barrel is divided into three sections from an orifice, the body of the grouting barrel at the first section is kept original, high-pressure grout flowing holes are arranged on the periphery of the body of the grouting barrel at the second section at intervals, a metal sleeve is distantly sleeved on the body of the grouting barrel at the third section and supports an anchor cable steel strand, gap sections are arranged at intervals between the anchor cable steel strand and the grouting barrel, and low-pressure grout flowing holes are arranged on the periphery of the body of the grouting barrel of the gap sections. During grouting, grout flows to completely fill the gaps of the low-pressure grouting area of the deep surrounding rock firstly and then fill the gaps of the high-pressure grouting area from inside to outside step by step, and thereby, a grout pressure arch is formed in the deep shaft surrounding rock, grouting from the deep shaft surrounding rock to the shallow shaft surrounding rock is realized, grouting efficiency of the deep shaft surrounding rock is improved, and grouting effect of the deep surrounding rock is guaranteed.

Description

technical field [0001] The invention relates to roadway support technology, and belongs to the field of mining engineering, in particular to a grouting anchor cable for deep surrounding rock in the roadway. Background technique [0002] Deep soft rock roadways generally have the characteristics of large in-situ stress, soft and broken surrounding rocks, and large rheological properties of surrounding rocks. If the support measures are not appropriate, the deformation of the surrounding rock of the roadway will become more severe, which will eventually lead to the destruction of the roadway. For this type of roadway at home and abroad, U-shaped steel shrinkable metal brackets, closed arches, anchor rods and anchor cables are usually used for support, and grouting anchor cables are used for grouting reinforcement. The technology related to this application is the grouting reinforcement technology with grouting anchor cables. [0003] The traditional grouting anchor cable str...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of difficult and low efficiency of grouting in the deep surrounding rock of the roadway, the present invention designs a high-efficiency anchor cable for grouting in the deep surrounding rock of the roadway

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