中文摘要：

为研究红岭铅锌矿分枝矿体在回采中的围岩破坏机理,分析中间夹层岩体对回采的影响。建立三维力学计算模型,应用并行计算技术和COMSOL Multiphysics数值仿真软件,从顶板、矿柱破坏模式和规律,围岩的动态破坏机理方面,对含夹层的分枝矿体多中段回采进行了研究。研究结果表明：（1）顶板主要破坏模式为拉破坏,矿柱主要破坏模式为X状共轭剪切破坏。（2）围岩的动态破坏机理：回采3中段,大理岩两侧失去围岩约束,3中段底板产生单斜面剪切破坏;回采4中段,大理岩悬空,地表产生拉剪破坏;回采5中段,大理岩陷落,地表塌陷。

英文摘要：

In order to study the surrounding rock failure mechanism in the stoping process of the branched ore-bodies of Hongling Pb-Zn Mine,and analyze the influence of intermediate sandwich rock mass on the ore-body stoping,the three-dimensional mechanical calculation model is established,the multi-level stoping technique of the branched ore-bodies contained the intermediate sandwich rock mass is studied from the aspects of the failure model and regularity of roof and pillars,surrounding rock dynamic failure mechanism by adopting the parallel computing technique and COMSOL Multiphysics numerical simulation software. The study results show that：（1）the roof are mainly damaged by tensile stress and the failure model of pillars is mainly for X type conjugate shear failure.（2）the dynamic failure mechanism of surrounding rock can be summarized that the constraint of the both sides of marble is eased,single bevel shear failure occurs in the third middle floor after stoping the third middle; the marble hanging in the air and tensile-shear failure occurs in the earth＇ s surface after stoping the fourth middle; the marble is falling and the surface is collapsed after stoping the fifth middle.