下向进路侧帮可动块体的稳定性力学分析

为了研究下向进路侧帮矿体在上覆充填体作用下的变形特征，在综合分析侧帮矿体与充填体交接处可动块体形成条件的基础上，应用弹性理论分析了充填体对进路侧帮可动块体的力学效应。结果表明，充填体对侧帮可动块体的稳定性影响与进路高宽比、侧帮矿体的力学性质及可动块体的滑移面倾角有关，阐明了充填体作用下下向进路侧帮可动块体的变形破坏机理，推导了可动块体顶面受充填体作用力大小的计算方法，以及可动块体在充填体作用下的稳定性系数计算方法。武山铜矿开采的工程实例应用证明了该方法的应用效果。

Mechanical Analysis of Stability of Movable Block Body at Underhand Cut-and-fill Drift Side

In order to study the deformation characteristics of the side-wall rock of underhand drift under overlaying filling pressure, and based on the comprehensive analysis of the forming criterions of movable block body in connecting between the backfill body and underhand cut-and-fill drift, the mechanical effects of the backfill body on the underhand cut-and-fill drift is analyzed with elastic theory.The results show that the effects of the backfill body on the stability of the rock of underhand cut-and-fill drift relate with the aspect ratio of the underhand drift, the mechanical properties of the orebody, and the dip angle of the movable rock mass's sliding surface.The deformation and failure mechanism of the movable block body under filling pressure was discussed, and the methods for calculating the stability coefficient of movable block body and the force on the movable block body from the backfill body were put forward.Finally, the applied effect of the method is verified with a practical engineering case in Wushan copper mine.