Main control and roadway retaining method for anchor injection and top-cutting in deep mining roadway

Abstract

The invention provides a main control and roadway retaining method for anchor injection and top-cutting in a deep mining roadway, which comprises the following steps: step 1, determining the technicalparameters required for realizing the top-cut and roadway retaining in the deep mining roadway; step 2, carrying out the grouting anchor cable support construction during the tunnelling period of thedeep mining roadway; step 3, carrying out the advanced overcut and perforating construction at the roadway side during the mining of the working face; step 4, carrying out grouting anchor cable support construction during the mining of the working face; step 5, carrying out monomer strut support construction at the roadway side during the mining of the working surface; step 6, carrying out auxiliary support construction. The method has the advantages that the supporting requirements of the deep gob-side entry can be satisfied when carrying out non-pillar mining construction in the deep mine.

Description

technical field [0001] The invention relates to the technical field of mine pressure and roadway support, in particular to a main-controlled roadway retention method for anchoring, grouting and roof cutting in deep mining roadways. Background technique [0002] For a long time, my country's mines have mostly used coal pillars to mine and maintain roadways, resulting in a large amount of coal loss, which generally accounts for about 40% of the total coal loss in the mine. Therefore, the study of coal pillar-free mining technology between sections is an effective and good means for most coal mining enterprises, whether it is to improve the recovery rate of coal resources or reduce the rate of roadway excavation. With the increase of mine mining scope and mining depth, the complex environment of "three highs and one disturbance" in the deep surrounding rock has brought a series of problems to the application of gob-side entry retaining technology: The load disturbance increase...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a main control roadway retaining method of anchoring, grouting and roof cutting in deep mining roadways, which adopts the method of "grouting reinforcement in the roadway + drilling pre-cracking beside the roadway" to solve the problem of mining construction without coal pillars in deep mines. Difficult to meet the technical problems of deep gob-side roadway support requirements

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