Gas extraction device at upper corner of coal face of coal mine

Abstract

The invention discloses a gas extraction device at an upper corner of a coal face of a coal mine. The gas extraction device comprises an extraction pipeline and a blowing pipeline, wherein the extraction pipeline and the blowing pipeline are fixedly connected through a fixed connecting rack; one end of the extraction pipeline communicates to a filter box body while the other end of the extractionpipeline communicates to a water storage tank body, and an exhaust pipeline is arranged at the top end of the water storage tank body; a plurality of first inclined connecting pipes are arranged on the side surface of the exhaust pipeline, and the included angle between the first inclined connecting pipe and the end, close to the filter box body, of the extraction pipeline is not greater than 75 degrees; one end of the blowing pipeline stretches into the coal face while the other end of the blowing pipeline communicates to an inertia gas tank, a plurality of second inclined connecting pipes are arranged on the side surface of the blowing pipeline, and the included angle between the second inclined connecting pipe and the end, lose to the inertia gas tank, of the blowing pipeline is not greater than 75 degrees; and a power fan is arranged on the fixed connecting rack, and an air outlet of the power fan communicates to the first inclined connecting pipes and the second inclined connecting pipes through an air outlet pipeline, separately.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a gas drainage device at the upper corner of a coal mining working face in a coal mine. Background technique [0002] Coal mines are areas where human beings exploit coal resources in coal-rich mining areas, and are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far away from the surface, it is generally selected to excavate the coal by digging the roadway underground, which is an underground coal mine. When the distance between the coal seam and the surface is very short, it is generally chosen to directly strip the surface soil layer to excavate coal, which is an open-pit coal mine. The vast majority of coal mines in my country are underground coal mines. Coal mines include large areas above and below ground and associated facilities. A coal mine is a reasonable space excavated by humans when excavating geological layers rich in coal, u...

AI Technical Summary

Problems solved by technology

[0004] Existing upper corner gas extraction devices all use exhaust fans as the extraction power. Due to the long drainage pipelines, sometimes even up to thousands of meters, the suction of the exhaust fans decreases with the increase of the length, seriously The working efficiency of the gas drainage operation is reduced. Therefore, we propose a gas drainage device at the upper corner of the coal mining working face of the coal mine that can improve the drainage efficiency to solve the above problems

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