High-gas mine Y-shaped ventilation method

Abstract

The invention provides a high-gas mine Y-shaped ventilation method. The method comprises the following steps of: before the crossheading tunneling, tunneling a floor suction roadway in a coal seam floor rock layer, wherein the position of the floor suction roadway corresponds to a working face rail crossheading and open-off cut; arranging a gas drainage pipe in a roadway; tunneling the rail crossheading and open-off cut in a working coal seam right above the floor suction roadway to form a ventilation system; excavating a coal roadway along the coal seam strike at the tail end of the rail crossheading; tunneling an air return inclined roadway in an inclined downward direction along the coal seam at the tail end of the coal roadway; communicating the floor suction roadway after the same seam position of the floor suction roadway is reached; then, building a sealing wall at the floor suction roadway in the communicating position; and building a roadway-side filling body to remain a rail roadway in the working face extraction process, and arranging a gas drainage pipeline for draining gas in a goaf. The method solves the problem of gas bursting in the working face corner gas accumulation and tunneling process; the safety is high; one roadway has multiple purposes; the mining cost is low; the working face does not pass through an abandoned roadway; and the process is simple.

Description

technical field

[0001] The invention relates to a ventilation method for a high-gas mine roadway, in particular to a Y-shaped ventilation method for a high-gas mine which improves the existing ventilation roadway. Background technique

[0002] Pillarless mining is an advanced coal mining technology that can rationally develop coal resources, improve roadway maintenance, reduce the amount of roadway excavation, is conducive to mine safety production and improves mine technical and economic effects. The implementation of coal pillar-free mining not only has practical significance for technical transformation of production mines, ease of mining relations and prolonging mine life, but also is one of the important ways for coal enterprises to improve safety conditions and technical and economic indicators, increase production, increase profits and reduce losses. As a coal pillar-free roadway protection technology, gobside entry retention is an effective way to reasonably develop ...

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