Gas drainage device and hydraulic support in the upper corner of coal mining working face in coal mine

Abstract

The invention provides a gas extraction device for an upper corner of a coal mining working face and a hydraulic bracket. The device comprises a box body, wherein a containing cavity is formed in the box body; the bottom surface of the box body is fixedly connected with a connecting pipe; one end of the connecting pipe is communicated with the containing cavity in the box body; the other end of the connecting pipe is communicated with a gas extraction pipe of a coal mine extraction system; and sieve holes for allowing gas to enter the box body are formed in the box body. The gas extraction device for the upper corner of the coal mining working face can enlarge an extraction range and a space, so that an extraction effect is improved; the gas accumulated at the upper corner of the coal mining working face and in a neighboring area is extracted effectively; gas concentrations of the upper corner and the surrounding area of the upper corner can be reduced effectively; and the safety of coal mine production is improved.

Description

technical field [0001] The invention relates to coal mine mining technology, in particular to a gas drainage device and a hydraulic support at the upper corner of a coal mining working face in a coal mine. Background technique [0002] Comprehensive gas prevention and control plays an important role in coal mine safety production, and gas drainage is an effective means of comprehensive gas prevention and control. During the mining process of the coal mining face, gas is easy to accumulate in the corner of the coal mining face, and the large amount of accumulation will bring safety hazards to production safety. [0003] In the prior art, the gas drainage at this position is generally realized by burying gas drainage pipes after the corners of the coal mining face are blocked. However, the effective drainage range of this buried pipe drainage method is small, and the drainage space at the upper corner is also limited, which makes it difficult for this plugged buried pipe drai...

AI Technical Summary

Problems solved by technology

However, the effective drainage range of this buried pipe drainage method is small, and the drainage space at the upper corner is also limited, which makes it difficult for this plugged buried pipe drainage method to extract the accumulated water in the upper corner on a large scale. gas, resulting in poor gas drainage effect and high gas concentration between hydraulic supports in the upper corner and adjacent areas

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