Mined-out area gas extraction device with remotely controlled telescopic vertical pipe

Abstract

The invention relates to a mined-out area gas extraction device with remotely controlled telescopic vertical pipes, which is suitable for mines with high gas contents, non-obvious periodic pressure and serious roof cracking deformation. The mined-out area gas extraction device with the remotely controlled telescopic vertical pipes comprises an extraction main pipe, telescopic vertical pipes and a pipe closing device. The extraction main pipe is a high molecular polyethylene pipe; a valve is mounted at the upper part of the extraction main pipe and connected with the telescopic vertical pipes; each telescopic vertical pipe is formed by four sections of high molecular polyethylene screen pipes with inconsistent lengths and different pipe diameters; 40 screen holes and a 2 mm deep groove are distributed in each section of screen pipe; the remote pipe closing device comprises a circular closing door and a closing stay wire; the circular closing door is mounted in the extraction main pipe and used for closing the pipe; and the closing stay wire is a cable of Phi 4 mm and used for remotely controlling the pipe closing. The mined-out area gas extraction device with the remotely controlled telescopic vertical pipes, provided by the invention, is advantaged in that the vertical pipes can be remotely unfolded and closed; due to the contractibility of the vertical pipes, normal extraction can be still performed while a roof seriously sinks; safe, efficient and long-term mined-out area gas extraction can be realized; and the mined-out area gas extraction device exerts wide practicability.

Description

technical field [0001] The invention relates to a remote-controlled gas drainage device with a retractable standpipe in a goaf of a coal mine, which is most suitable for mines with high gas content, insignificant periodical pressure, and severe roof fracture and deformation. Background technique [0002] In mines with high gas content, insignificant periodic pressure, and severe roof fracture and deformation, it is particularly difficult to control gas in goafs. Gas overruns frequently occur in upper corners, affecting the safe and rapid production of coal mines. After the mining of high gas and outburst mine face, a large amount of gas remains in the goaf. Because the periodic pressure is not obvious, the goaf has a suspended roof. As the roof slowly sinks, the gas in the goaf gushes out in large quantities, causing the gas in the upper corner to exceed the limit and affecting safe production. Traditional goaf buried pipe and standpipe drainage methods have disadvantages s...

AI Technical Summary

Problems solved by technology

Because the periodic pressure is not obvious, the goaf has a suspended roof, and as the roof slowly sinks, the gas in the goaf gushes out in large quantities, causing the gas in the upper corner to exceed the limit, affecting safe production

The traditional goaf buried pipe and standpipe drainage methods have disadvantages such as low safety factor, low drainage efficiency, poor effect, and short cycle, which are often difficult to meet the normal safety production requirements

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