Roof-cutting and pressure relief roadway-protecting method for end-mining equipment remove gateway of coal face

Abstract

The invention discloses a roof-cutting and pressure relief roadway-protecting method for an end-mining equipment remove gateway of a coal face, and belongs to the technical field of mining engineeringmine pressure control and roadway maintenance. The problem that the mining rate of a mining area is low due to the large size of a protection coal pillar between an existing working face stop line and a mining area main roadway is solved. According to the roof-cutting and pressure relief roadway-protecting method for the end-mining equipment remove gateway of the coal face, the working face support equipment remove gateway is excavated in advance along the stop line position and a propagation path of the working face mining advanced supporting pressure is cut off through deep hole pre-cracking of a coal seam roof. The mining area main roadway is protected from the mining action of the mining face on both sides and the width of the protection coal pillar between the working face stop lineand the mining area main roadway is reduced, so that the mining rate of the mining area is improved. The mining rate of the mining area of non-renewable coal resources is improved under the premise ofensuring the safety and stability of the mining area main roadway.

Description

technical field [0001] The invention belongs to the technical field of mine pressure control and roadway maintenance in mining engineering, and in particular relates to a propagating path for advance supporting pressure in advance excavation of support equipment along the position of a stop-mining line and a deep hole pre-splitting coal seam roof to cut off the working face mining advance support pressure. The method of protecting the main roadway in the mining area from the influence of mining on both sides of the mining face and reducing the protection of the coal pillar between the stop line and the main roadway in the mining area to improve the recovery rate of the mining area. Background technique [0002] Coal is the basic energy that guarantees the rapid development of my country's national economy. In order to meet market demand, the production scale of my country's coal production enterprises is getting larger and larger. Under the current production technology cond...

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Problems solved by technology

[0006] The invention aims at the problem that the size of the protective coal pillar between the stop line of the existing working face and the main roadway of the mining area is large, which leads to the low recovery rate of the mining area, and provides a top-cutting and pressure-relief protection for the withdrawal channel at the end of the mining working face. Roadway method, the invention is a method of cutting the propagating path of the advanced support pressure of the working face through the deep hole pre-splitting coal seam roof, and provides a method of excavating the retraction channel of the support equipment of the working face in advance along the stop line position and deep hole pre-cracking. The roof of the cracked coal seam cuts off the propagating path of the advanced support pressure of the working face, protects the roadway in the mining area from the impact of mining on both sides of the mining face, and reduces the width of the protective coal pillar between the stop line of the working face and the main roadway in the mining area. Methods of Improving the Recovery Rate of the Mining Area

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