急倾斜采空区矸石充填顶板控制力学模型分析

Based on the mechanical characteristic of the roof in gangue filling mining of the steep seam, the beam type mechanical model of the roof strata was built. The deflection formula was obtained by considering the filling gangues' supporting force, and the roof control effect of the gangues with different filling amount, filling strength and roof dip angle was studied. The research showed that: With the increase of the filling amount, filling strength and the roof dip angle, the roof deformation decreased. The maximum deflection position moved towards the filling body with larger filling amount, moved to the middle part of the unfilled goaf under stronger filling strength, and moved to the bottom when the roof dip angle increased. When the filling gangues with small compressive ratio in the goaf, and the gangues reached the maximum deflection position, the roof control effect of the gangues would be fully realized.