Gas extraction method for connection roadway

Abstract

The invention discloses a connection roadway gas extraction method which comprises the following steps that a roadway arrangement track of a connection roadway is preset, and the area where the roadway arrangement track intersects with a coal seam is a shock wave anti-reflection area; the facility work roadway is a roadway closest to the shock wave anti-reflection area in the normal direction, and the area, closest to the shock wave anti-reflection area, in the construction roadway is an equipment placement area; a drilling position is arranged between the equipment placement area and the shock wave anti-reflection area, and a shock wave operation point is arranged at the part, located in the shock wave anti-reflection area, of the drilling hole; after the drill hole is drilled, shock wave anti-reflection operation is carried out on a shock wave operation point through shock wave generation equipment in an equipment placement area, a crack is formed in the coal body through shock waves, and the crack is a gas seepage channel; and gas in the coal body is extracted at the hole opening of the drill hole. The problem that in the prior art, when gas extraction is conducted through a controllable shock wave coal seam anti-reflection technology, efficiency is low is solved.

Description

technical field [0001] The application belongs to the technical field of coal mine mining, and in particular relates to a gas drainage method in a connecting roadway. Background technique [0002] Regardless of shafts, adit, or underground coal mines with roadway development methods, the construction of the underground ventilation system must be completed in advance in terms of roadway layout, that is, the main roadway should first be developed to form an effective air intake and return system, which is natural. The "skeleton" of a single well field is formed. On this basis, the level, panel and mining face are further divided to carry out orderly coal recovery. Before forming a systematic roadway, it is necessary to further develop new communication roadways for ventilation, pedestrians or transportation. Such connection roadways often require Go up, flat or down through one or more coal seams for stone gate coal removal. [0003] Shimen unraveling coal is the process of ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a method of gas drainage in a connecting roadway, which solves the problem of gas drainage through the controllable shock wave coal seam anti-permeability technology in the prior art. There are inefficiencies

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