Analysis of Surface Movement Law in Large Mining Height Working Face
In order to accurately protect the buildings within the mining area,it is necessary to accurately grasp the surface movement laws caused by the mining of the working face.This article analyzes the impact of different coal seam depths,bedrock thicknesses,and coal seam thickness on surface subsidence through numerical simulation methods,and conducts surface subsidence displacement measurements on the 201 high mining face of a certain mine by arranging displacement observation lines on the surface.The research results indicate that the amount of surface subsidence after mining increases with the increase of coal seam thickness,bedrock thickness,and mining depth.The mining thickness has the greatest impact on the amount of surface subsidence,followed by mining depth and bedrock thickness.Mining in the working face will produce a surface movement basin,and the surface subsidence area caused by mining in the working face is larger than that of mining in the working face.The basic parameters of surface movement obtained from the study under this working condition can provide theoretical reference for the protection of surface buildings in this area and similar working conditions.
large mining heightcoal pillar protectionsurface displacementsurface subsidence
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