关键词: 近距离采空区下, 大倾角, 俯伪斜工作面, 矿压显现, 顶板运动

Abstract: Aiming at the characteristics of ground pressure distribution in large dip angle subduction pseudo-inclined working face, combined with the mining geology and engineering conditions of large dip angle close-range coal seam group in Huainan Coal Mine, this paper studies the evolution characteristics of abutment pressure in different mining stages of large dip angle subduction pseudo-inclined working face. Based on the field observation data and numerical simulation analysis, the abutment pressure distribution and numerical calculation model in front of coal rib in large dip angle coal seam with subduction and pseudo-inclination mining at different mining stages are constructed. The action range of abutment pressure in front of coal rib is calculated, and the saddle-shaped distribution of abutment pressure in subduction and pseudo-inclined working face in large dip angle coal seam is revealed. Through theoretical analysis and field measurement, the periodic weighting step and roof weighting strength of working face are analyzed, proposing the ground pressure control measures of working face and achieving good economic and technical benefits.