深孔爆破装药结构优选数值分析方法及其应用  

Numerical analysis method for optimizing charging structure of deep-hole blasting and its application

作　　者：刘优平[1,2] 龚敏[1] 黄刚海[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]南昌工程学院土木与建筑工程学院,南昌330099 [3]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《岩土力学》2012年第6期1883-1888,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.50969007);江西省教育厅青年科学基金课题(No.GJJ10272)

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。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.

关 键 词：采矿工程 深孔爆破 装药结构 ANSYN/LS-DYNA 爆破块度 后冲作用 

分 类 号：TD853[矿业工程—金属矿开采]