Method of using high-pressure water injection to prevent and treat gas coal dust

Abstract

The invention provides a method of using high-pressure water injection to prevent and treat gas coal dust, and relates to a method of using coal seam water injection to prevent and treat the gas coal dust. The method comprises the steps of constructing a bedding drainage borehole, inserting a drainage tube into the borehole, sealing a hole sealing section of the borehole, and beginning to conduct drainage of the gas in the coal seam; regarding a second borehole as a water injection hole, dismantling a second drainage pipeline and a second orifice plate flowmeter which are connected to the second drainage tube, and inserting an expansion hole packer into the second drainage tube; connecting the expansion hole packer with a high-pressure valve, a water injection flowmeter, a high-pressure water injection pump and an underground water supply pipe sequentially through a high-pressure rubber hose; utilizing the high-pressure water injection pump to inject water into a second borehole implement coal seam; turning off the high-pressure valve. According to the method, injection-drainage boreholes are utilized to alternately arrange and implement the coal seam water injection, the gas drainage amount of adjacent drainage boreholes can be increased, the gas gushing amount during digging is reduced, the water content of the coal seam is increased, the dust concentration during digging is reduced, the working environment of working staff is improved, and mine gas coal dust disasters are effectively prevented and treated.

Description

technical field [0001] The invention relates to a method for preventing and controlling gas and coal dust by injecting water into a coal seam, in particular to a method for preventing and controlling gas and coal dust by injecting water under high pressure. Background technique [0002] Coal mine gas drainage is the fundamental way to prevent and control mine gas disasters. For coal seams with high gas, coal and gas outburst mines, especially single low-permeability coal seams, it is impossible to implement anti-outburst measures in the mining area of ​​the protective layer, and pre-extraction of coal seam gas is often used. Measures, due to the low permeability coefficient of the coal seam, there are problems such as long pre-drainage time, small gas flow rate, and low gas concentration in the gas extraction, resulting in poor coal seam gas drainage effect and seriously affecting the replacement work of the mining face. In response to these problems, relevant scientific res...

AI Technical Summary

Problems solved by technology

In response to these problems, relevant scientific researchers have carried out technical research work such as coal seam water injection for dust prevention, high-pressure spray dust suppression, and foam dust suppression. Coal seam water injection is a permanent measure for dust prevention and control. The spatio-temporal contradiction is very prominent, resulting in poor effect of coal seam water injection

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