Underground coal mine reverse broaching and permeability increasing device and use method thereof

Abstract

The invention discloses an underground coal mine reverse broaching and permeability increasing device and a use method thereof. The underground coal mine reverse broaching and permeability increasing device comprises a device shell, a central shaft and a plane slider linkage mechanism; the central shaft is arranged inside the device shell, the plane slider linkage mechanism comprises swing rods hinged to the device shell sliders slidably connected to the central shaft in a single-degree-of-freedom manner and connecting rods connected between the sliders and the swing rods, each swing rod is provided with a cutting edge, and broaching and hole enlarging can be performed on the premise of not replacing the bit. The underground coal mine reverse broaching and permeability increasing device is simple in use and convenient to operate; purchasing cost for a mine party is lowered since a drill pipe and a tail plait which are used are identical to a fixed-point sampling device, and handling intensity of workers is lowered; the sampling bit is replaced, coal samples can be rapidly obtained at fixed points, and content of gas is measured; the bit and the reverse broaching and permeability increasing device are used, so that pressure releasing and permeability increasing effect can be realized, and gas extraction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal seam drilling, in particular to an underground reverse reaming and anti-reflection device for coal mines and a method for using it. Background technique [0002] The main method of gas control is drainage, but the outburst coal seam often has poor permeability, and gas extraction from it is not only difficult to drill, but also the drainage effect is not good, and the drainage radius is small. Although hydraulic fracturing and other technologies are currently used in some mines, there are many hidden dangers such as polluting water sources and destroying ecology, and there is also the possibility of inducing outbursts. [0003] Therefore, it is an urgent need to change the current situation of drainage at the expense of densely distributed holes and high engineering volume, so as to achieve the ideal drainage effect within a limited drainage time. Contents of the invention [0004] In view of this...

AI Technical Summary

Problems solved by technology

[0002] The main method of gas control is drainage, but the outburst coal seam often has poor permeability, and it is not only difficult to drill gas from it, but also the drainage effect is not good, and the drainage radius is small

Although hydraulic fracturing and other technologies are currently used in some mines, there are many hidden dangers such as polluting water sources and destroying ecology, and there is also the possibility of inducing outbursts.

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