A method for controlling gas drainage in goaf

Abstract

The invention specifically provides a gob gas extraction device and method, and aims at solving the problems of large consumption on pipes, increase on cost, complex mounting, and easy damaging of the existing gob extraction technique. The gob gas extraction device comprises a tee joint; one end of the tee joint is connected with a main pipe switch and while the other end of the tee joint is connected with a branch pipe switch; the main pipe switch comprises a flange shaped housing; a reversed U-shaped supporting rod is fixed to the convex end of the housing; a rubber ring is fixed in the housing; a rotating shaft and a non-return spring sheet are fixed inside the housing; the limiting spring sheet is fixed to the U-shaped supporting rod; a rotating fan blade is hinged to the rotating shaft; the branch pipe switch comprises a flange shaped housing I; a reversed U-shaped supporting rod I is fixed to the convex end of the housing I; a rubber ring I is fixed in the housing I; a rotating shaft I and a limiting spring sheet I are fixed inside the housing I; a non-return spring sheet I is fixed to the U-shaped supporting rod I; a rotating fan blade I is hinged to the rotating shaft I. With the adoption of the gob gas extraction device and method, the control to the gas extraction in different gob areas is realized.

Description

technical field [0001] The invention relates to an underground gas drainage control technology in coal mines, in particular to a gas drainage control method in a goaf that is suitable for gas drainage in goafs where different areas need to be treated differently. Background technique [0002] Mine gas is an important threat to coal mine safety, and the gas from the goaf is an important source of gas in the mining face. [0003] At present, most mines use the method of gas extraction by buried pipes in the gob area of ​​the working face. It is to pre-install the main gas drainage pipe in the air return lane of the working face, and a series of branch pipes at a certain distance extend from the main pipe to the goaf. , through the negative pressure in the pipeline, the gas in the goaf is pumped into the main pipe through the branch pipe. [0004] According to the gas drainage effect of buried pipes, the goaf can be divided into three parts. The first part is within 0-30 meter...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large consumption of pipes, increased cost, cumbersome installation and easy damage in the existing goaf drainage technology, the present invention provides a gas drainage control method for goafs

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