Mine grouting anchor cable supporting method

Abstract

A mine grouting anchor cable supporting method comprises the steps of manufacturing a grouting anchor cable tie, wherein the grouting anchor cable tie is composed of multiple anchor cable bodies, a conical grouting stopping plug, a tray, a lock, an end anchor grouting stopping plug, an anchor cable fixing frame, a tightening ring and the like. An anchor cable body comprises an end anchor grouting anchor cable body, a full-anchor grouting anchor cable body and an exhaust grouting anchor cable body, and the three grouting anchor cable bodies are combined to replace a common anchor cable body; 2, installing and supporting the grouting anchor cable tie, wherein the end anchor grouting stopping plug is sleeved with the end anchor section of the anchor cable tie, the grouting anchor cable tie is fed into a drilled hole, a barb hook hooks the wall of the hole, and the conical grouting stopping plug, the tray and the lock are sequentially installed; grouting of the end anchor section is performed by means of the end anchor grouting cable body, and air is exhausted through the full-anchor grouting anchor cable body; after grouting of the end anchor section is solidified, the lock is used for tensioning and pre-tightening the anchor cable tie; the full-anchor grouting anchor cable body is used for performing grouting on the full anchor section, and the exhaust grouting anchor cable body is used for exhausting air. The method is applicable to ultra-soft cracking and deep high stress roadway supporting, and can achieve ultra-long deep strong anchoring. The cable body is provided with a core tube so that end anchoring, full-anchoring grouting and air exhausting can be achieved, and construction is greatly simplified.

Description

technical field [0001] The invention relates to the field of mine anchorage and support, in particular to a mining grouting anchor bundle support method used for roadway support or reinforcement under complex and difficult conditions such as mine soft rock, broken zone, deep well and high stress area. Background technique [0002] As the depth of mine mining increases year by year, the geological conditions become more and more complex, the mine pressure is getting bigger and bigger, and the roadway support is becoming more and more difficult. Domestically, hollow grouted anchor rods and hollow grouted anchor cables are used for roadway support under deep high-stress and complex geological conditions, and have achieved certain results. However, for some special conditions, there are still insufficient support strength, insufficient support range, For the problem of large roadway deformation, combined anchor cable support is also used for roadway support under such special co...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome many deficiencies in the prior art for grouting anchor cable bundles used in deep, high-stress and complex roadways, the support strength is low, the support range is small, the construction is difficult, and the process is complicated. The present invention provides a mine grouting anchor The cable beam support method can meet the requirements of roadway support and reinforcement in high-stress areas in deep coal mines, soft rock and broken zones, and has the advantages of large support range, high support strength and convenient construction

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