Large-dip-angle coal seam gob-side entry retaining roadside filling supporting method

Abstract

The invention provides a large-dip-angle coal seam gob-side entry retaining roadside filling supporting method, and relates to the field of coal supporting. The large-dip-angle coal seam gob-side entry retaining roadside filling supporting method comprises the following steps that 1, temporary supporting in roadways is achieved in front of and behind a working face, top and bottom supporting of a gob-side entry retaining filling area and supporting design of a gob-side entry retaining filling body are achieved; 2, pressure relief of a goaf roof is achieved; 3, pump station mixing materials are filled; 4, a reinforcing mesh and air duct cloth are arranged; and 5, filling is conducted, and the first step to the fifth step are repeated till recovery is finished. According to the large-dip-angle coal seam gob-side entry retaining roadside coal ash paste filling supporting method, the problem that a filling body is unstable due to impact of falling gangue caused by insufficient supporting strength in a traditional roadside supporting mode is solved, the isolation effect is good, air leakage and gas escape are not likely to happen, and the safety performance of the large-didp-angle coal seam gob-side entry retaining roadside coal ash paste filling supporting method is greatly improved.

Description

technical field [0001] The invention relates to the field of coal filling and supporting, in particular to a filling and supporting method with fly ash paste next to a gob-side retaining roadway of a large-inclination coal seam. Background technique [0002] At present, mining technology in gently inclined coal seams and high-inclined thin coal seams, and gob-side entry retention technology have been well developed. The included angle formed by the direction of the rock bedding plane becomes smaller, so the force of gravity along the bedding direction is greatly increased, which makes the surrounding rock movement and the form of roof caving have obvious differences from those in the mining of gently inclined coal seams. , leading to the possibility of sliding or overturning of the filling body beside the roadway. The invention solves the shortcomings of the traditional gob-side roadway retaining technology in the application of high-inclination coal seams, effectively alle...

AI Technical Summary

Problems solved by technology

[0002] At present, mining technology in gently inclined coal seams and high-inclined thin coal seams, and gob-side entry retention technology have been well developed. The included angle formed by the direction of the rock bedding plane becomes smaller, so the force of gravity along the bedding direction is greatly increased, which makes the surrounding rock movement and the form of roof caving have obvious differences from those in the mining of gently inclined coal seams. , leading to the possibility of sliding or overturning of the roadside filling body

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