关键词: 松软煤层, 数值模拟, 巷道变形, 围岩控制

Abstract: Aiming at the difficult problem of large deformation of surrounding rock and serious failure of support structure of roadway in soft coal seam,distribution characteristics of displacement,stress and plastic zone of surrounding rock is analyzed by way of numerical simulation,taking Huagaishan 104 working face headway as the engineering background,based on the analysis of deformation characteristics of roadway surrounding rock.The result shows the main reasons for the serious deformation of surrounding rock are the low strength of coal seam,the poor cementation and the unreasonable supporting mode.The plastic zone of surrounding rock is small,the stress concentration zone is located in the deep part,and the distance to the roadway center is more than 6m,so that good engineering application effect is achieved.

Key words: Soft coal seam, Numerical simulation, Roadway deformation, Surrounding rock control