A "u and u + upper corner pumping" gas control method in the mining face

Abstract

The invention relates to a method for controlling gas in the mining face of "U and U + upper corner pumping and drainage", including "U and U" roadway layout, underground fixed drainage pumping station system construction, normal bedding drilling of the mining face, and high-level roof Arrangement of drilling and upper corner extraction. The "U and U" roadway layout includes two U-shaped ventilation system roadways, through the common bedding drilling of the inlet airway and the return airway of the mining face, and the high-level drilling of the roof of the return airway of the mining face for drainage. The wind tunnel is used as an auxiliary air return at the mining surface, and the goaf buried pipe and the upper corner extraction pipeline are arranged to realize the buried pipe drainage of the goaf and the upper corner extraction of the mining surface. Compared with the existing technology, it avoids the problem of abnormal gas gushing caused by the aggravation of air leakage in the goaf when the large air volume is introduced into the mining face during multi-lane ventilation, and solves the recovery rate caused by excessive coal falling in the goaf of thick coal seams Low and large gas emission in the goaf restricts the safety production of the mining face.

Description

technical field [0001] The patent of the present invention relates to a gas control method on the mining face of a high gas coal mine, specifically a method for gas control on the mining face of "U and U + upper corner extraction". Background technique [0002] Since the promulgation and implementation of the new "Safety Production Law" (2017), my country's emphasis on production safety has increased year by year. Coal mines, as an important area prone to accidents and frequent occurrences, have imposed more stringent requirements on the production of underground coal mines. Regulation. The new version of the "Coal Mine Safety Regulations" (2016) requires that the ventilation of special gas drainage lanes and tail lanes be cancelled, and it is strictly forbidden for the return air of the mining face to pass through the goaf and the roof fall area, so as to provide ventilation for the gobs that have been used for many years in many coal mines in China. The rectification of th...

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Problems solved by technology

[0003] The invention mainly solves the problem of abnormal gas gushing caused by aggravated air leakage in the goaf when large air volume is introduced into the mining face during multi-lane ventilation, and at the same time solves the problem of low recovery rate caused by too much coal left in the goaf during thick coal seam mining 1. The amount of gas gushing out in the goaf is large, which seriously restricts the safety production of the mining face. A "U and U + upper corner extraction" gas control method for the mining face is proposed, including the "U and U" roadway layout, The construction of underground fixed drainage pumping station system and the common bedding drilling construction of the inlet airway of the mining face, the ordinary bedding drilling construction of the return airway of the mining face, the high-level drilling construction of the inner roof of the return airway of the mining face and the upper corner negative Compressed air duct exhaust method

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