Advanced medium-length hole pressure relief and dust fall integrated method for working face of impact dangerous coal seam

Abstract

The invention provides an advanced medium-length hole pressure relief and dust fall integrated method for a working face of an impact dangerous coal seam, relates to the technical field of mining engineering, and solves the problems of non-ideal pressure relief effect of drilling of the impact dangerous coal seam, coal dust pollution of the working face and the like. The method comprises the following steps of: monitoring and analyzing mine pressure in front of a crossheading of the working face under similar conditions to determine the influence range of advanced bearing pressure; constructing a hole expansion type medium-length pressure relief drill hole in the roadway side of a mining roadway, and after hole expansion construction, forming a series channel by the pressure relief drill hole perpendicular to the roadway direction; sequentially arranging a plurality of pressure relief spaces along the axis of the series channel; after the medium-length pressure relief drill hole is completely formed, putting a water injection hole packer into the medium-length pressure relief drill hole to seal the pressure relief drill hole, communicating a water injection pipeline on an operation site with the hole packer, inserting the hole packer into the drill hole, and realizing hole sealing by utilizing expansion of a rubber pipe of the hole packer; and then injecting a JFC dust fall agent into the drill hole. By injecting the JFC dust fall agent into the pressure relief drill hole, the coal dust concentration during stoping of the working face is greatly reduced, and the operation environment is improved.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to an integrated method for pressure relief and dust reduction in advanced middle and deep holes in impacting dangerous coal seam working faces. Background technique [0002] With the increasing demand for coal, the scope of coal mining has gradually expanded, and more and more mines have gradually entered deep mining. However, the deep geological conditions and mechanical environment are relatively complex. Under the action of higher ground stress, the risk of coal seam impact increases, and the number of rock burst disasters increases, and the degree of damage becomes more and more serious. For coal seams with a tendency to impact, according to the requirements of relevant rock burst prevention methods and relevant regulations, it is necessary to relieve the pressure on the coal seam in advance to reduce the stress concentration on the coal seam or transfer high stress ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of densely arranged drilling holes, small effective range of pressure relief and coal dust pollution in the mining process when the coal mining face passes through the impact dangerous area, the present invention provides an advanced medium-deep hole pressure relief and The integrated method of dust reduction, the specific technical scheme is as follows

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