Gob-side entry driving method based on complete period of roadway service and adopting grouting anchor cable

Abstract

The invention relates to a gob-side entry driving method based on a complete period of roadway service and adopting a grouting anchor cable, belongs to the technical field of coal mining, and solves the problems of difficult supporting in an existing gob-side entry driving period, and complex advanced supporting operation and high labor intensity of workers in a later-period working face stoping period. The gob-side entry driving method comprises the following steps: driving along the edges of gobs in adjacent sections; laying metal meshes on the top plate and the two sides of a roadway; installing the hollow grouting anchor cable in a anchor cable hole in the top plate of the roadway, and installing a hollow grouting anchor rod and a high-strength anchor rod in anchor rod holes in the side of a coal pillar and the side of a working face separately; distributing observation equipment used for monitoring the fracture development of surrounding rock of the roadway on the surrounding rockof the roadway, and obtaining the fracture development degree of the surrounding rock of the roadway through the observation equipment; grouting to the hollow grouting anchor cable and the hollow grouting anchor rod on the basis of the fracture development degree of the surrounding rock of the roadway; and step S6, continuously cyclically repeating the steps S1-S5 until the gob-side entry drivingis completed. The gob-side entry driving method is easy to operate, and capable of greatly reducing the labor intensity of the workers, and the cost.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a gob-side digging method with grouting anchor cables based on the full cycle of roadway service. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. In my country's energy consumption, coal has always ranked first, and it has contributed a lot to my country's economic development. Coal mining first needs to divide the mining area, arrange the cutout and the mining roadway at the working face. The layout of the mining roadway can be divided into three methods: retaining coal pillars to protect roadways, retaining roadways along gobs, and driving coal pillars along gobs: retaining coal pillars to protect roadways The width of the coal pillar is 15-30m, which will cause a serious waste of coal resources; the gob-side retaining roadway will be affected by two mining operations during the mining of the next working face, the deformatio...

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a gob-side entry method with grouting anchor cables based on the full-cycle service of the roadway, to solve the support difficulties during the existing gob-side entry and the advanced support during the recovery of the later working face. Problems such as complex maintenance operations, poor ventilation, and high labor intensity of workers

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