Control method of gas comprehensive drainage arrangement in fully mechanized mining face in rapid recovery

Abstract

The invention discloses a comprehensive gas drainage arrangement treatment method for quick extraction of gas on a fully-mechanized surface. When an upper groove and a lower groove on a first working surface are excavated, an upper groove of a next working surface is excavated, and the second upper groove is excavated into a roadway, so that original construction on the first upper groove of hole-drilling drainage in high-position roof fractures and drainage through buried pipes is replaced by the construction on the upper groove of the next working surface. The method has remarkable economic and social security benefits by achieving gas treatment effects, coal belt transport and manual material transport in the first lower groove are not affected by gas treatment engineering such as high-position fracture hole-drilling construction and wall-penetrating hole-drilling construction in the second upper groove, normal running of equipment and mechanical and electrical facilities on an equipment train in the first upper groove is protected, and the problem that gas is beyond the limit on air return corners especially on upper corners is fundamentally solved.

Description

Technical field: [0001] The invention belongs to the technical field of gas comprehensive drainage arrangement in coal mine fully mechanized mining face, and in particular relates to a control method for gas comprehensive drainage arrangement in fully mechanized mining face of rapid recovery. Background technique: [0002] Dangjiahe Coal Mine is located in Fuxian County, Yan'an City, Shaanxi Province. It belongs to the Huangling Mining Area. It is adjacent to Huangling No. 1 and No. 2 Mine in the east and south respectively. 93km², the mined coal seam is Jurassic Yan'an Formation No. 2 coal, the buried depth is 300m-600m, the average coal thickness is 1.7m, the geological reserves are 188 million tons, the geological structure is simple, the coal seam dip angle is 0°-3°, and the gas identification level is low gas mine. [0003] The 104 working face started mining in June 2015. The general situation of the working face and the status of gas and drainage during the mining pr...

AI Technical Summary

Problems solved by technology

Using this comprehensive gas drainage method, the absolute gas emission rate of the return air at the mining face during the mining period can reach 4.8m³ / min, and the gas concentration in the upper corner mostly fluctuates in the range of 0.7%-1.2%. A little careless management will cause gas exceeding the limit and Accumulation, the gas concentration in the return airway of the upper trough fluctuates around 0.65%, and there is always the danger of gas exceeding the limit. Gas management is extremely difficult, and mine safety production is facing severe challenges

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