依托于云南磷化集团晋宁磷矿6#坑深部缓倾斜中厚磷矿地下充填法采矿工程,采用有限元数值模拟的方法,通过折减充填体强度研究了充填体强度变化对围岩及边坡的应力和位移的影响,并且从能量角度对充填体的作用进行阐释。结果表明,充填体强度增大减少系统的能量释放,有效减少地表沉降和顶板变形,改善围岩应力状态,并限制了围岩破坏及裂隙的发展。 Based on the mining project of underground filling method of 6 # deep pitched moderately thick phosphate rock in Jinning Phosphate Mine of Yunnan Phosphating Group, the strength of filling body was reduced by finite element numerical simulation. Slope stress and displacement, and from the energy point of view of the role of the filler body. The results show that the increase of the strength of the filling body can reduce the energy release of the system, effectively reduce the settlement of the ground surface and the deformation of the roof, improve the stress state of the surrounding rock and limit the destruction of the surrounding rock and the development of the fracture.