Filling method next to coal pillar roadway in steeply inclined coal seam section

Abstract

A filling method next to a coal pillar roadway in a steeply inclined coal seam section, including comprehensive processing and transportation of filling materials, advancing and moving frames on the working face, laying filling bags and filling partitions, pre-installing grouting pipes, and grouting filling. The filling space composed of the transport level entry and the goaf of some working faces constructs the filling body next to the coal pillar roadway to form a roadside support belt, which increases the volume of the coal pillar in the section, combines the filling body and the coal pillar into a unified whole, and effectively inhibits the It prevents the gangue in the goaf from sliding on the slope; improves the support strength of the roadway and solves the problem of difficult roadway support. It not only reduces the impact of the gangue sliding in the upper section goaf on the section coal pillar, but also reduces the deformation of the surrounding rock of the return air level roadway in the lower section, and maintains the stability of the roadway. At the same time, air leakage and spontaneous combustion of coal are prevented, and harmful gas in the goaf is prevented from entering the working area. The method is simple, easy to construct, time-saving and labor-saving, and the effect is good.

Description

technical field [0001] The invention relates to a filling method next to a coal pillar roadway in a section of a steeply inclined coal seam, and is especially suitable for filling next to a coal pillar roadway in a section of a steeply inclined long arm coal mining method. Background technique [0002] The mining of steeply inclined coal seams has always been an important subject in the research of coal mining technology. For a long time, a large number of experts and scholars have done a lot of research on it and achieved some satisfactory results. In the actual coal mining process, due to the particularity of geological conditions for mining steeply inclined coal seams, when mining steeply inclined coal seams, the gangue falling out of the goaf cannot stay in place in most cases due to its own weight. The inclined direction of the coal seam immediately slides down. Mechanism analysis of deformation and failure characteristics of mining roadways in steeply inclined coal se...

AI Technical Summary

Problems solved by technology

When leaving a roadway along the goaf in a steeply inclined coal seam roadway, there are problems such as the decline of gangue in the goaf, difficulty in roadway support, large deformation of the roadway roof, erosion of harmful gases in the goaf, and low utilization rate of the mining roadway.

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