中文摘要：

针对地下深孔爆破采矿过程中常出现的爆破后冲作用严重以及爆破块度不均匀等若干问题,以南方某铅锌矿实际采用的爆破、炸药和岩石参数为基础,采用ANSYS/LS-DYNA对矿山拟采用的不同装药量、不同耦合系数的6种装药结构建立了数值计算模型。通过分析爆炸仿真过程中的Von Mises有效应力信息,结合爆破破岩机制及Mises屈服理论,确定了深孔爆破的最佳炮孔装药结构。现场试验表明,优化的装药结构爆破块度均匀且爆破后冲作用得到有效控制,基本上解决了矿山深孔侧向爆破存在的问题,研究结果为深孔爆破的优化设计提供理论依据和技术支持。

英文摘要：

There are usually several problems during underground mine’s deep-hole blasting,such as large blasting back impact effect,non-uniform pieces and so on.In order to solve the problems in a southern lead-zinc mine,ANSYS/LS-DYNA is used to build numerical models for six kinds of hole’s charging structure with different charging quantities and different coupling coefficients based on parameters of blasting,explosives and rock in this mine.By analyzing information of Von Mises effective stress of blasting simulation,combining with mechanism of rock crack during blasting and Mises yield criterion,the best hole’s charging structure for deep-hole blasting is determined.In-situ test shows that,the optimized charging structure gets uniform blasting pieces;and back impact effect is controlled effectively.Problems of deep-hole lateral blasting in the mine is basically solved,so as to provide optimization of deep-hole blasting’s design with theoretical foundation and technical support.