爆破漏斗形成过程的SPH-FEM数值模拟  

Numerical Simulation of Blasting Funnel Formation Based on SPH-FEM Coupling Method

作　　者：雷涛[1,2] 许浩明[1] 蒋复量 叶海旺 Lei Tao;Xu Haoming;Jiang Fuliang;Ye Haiwang(School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China;Hubei Key Laberatory of Mineral Resources Processing and Environment, Wuhan 430070, China;The State Key Laboratory of Safety and Health for Metal Mines ,Moanshan 243000, China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [3]金属矿山安全与健康国家重点实验室,安徽马鞍山243000

出　　处：《金属矿山》2018年第5期17-22,共6页Metal Mine

基　　金：贵州省科技计划项目(编号:20172803);中央高校基本科研业务费专项(编号:2016IVA0490);金属矿山安全与健康国家重点实验室基金项目(编号:2016-JSKSSYS-03)

摘　　要：爆破漏斗形成过程分析对研究岩石动力破坏特性具有重要意义。基于光滑粒子流体动力学(SPH)理论,使用LS-DYNA软件,建立了爆破漏斗数值模型,模拟了爆破漏斗的形成过程。结果显示:爆破漏斗的形成经历了地表隆起、裂隙扩展和岩块抛掷3个过程;靠近自由面的岩体中有明显的斜向45°径向裂隙产生,表明此时爆破漏斗的形成主要受拉伸破坏控制;起爆瞬间,炸药周边岩体的运动速度较为均匀,随着爆炸的进行,沿竖直方向抛掷的岩块占据主导地位,在45°径向裂隙中的岩块速度最大,且炸药埋深在65 cm时爆破漏斗体积最大。Analyzing the formation of blasting funnel has great significance in studying the characteristics of rock dynamic failure. Based on the theory of smooth particle hydrodynamics（SPH）,the numerical model of blasting funnel is established to simulate the formation of blasting funnel by using LS-DYNA software. The results show that the formation of blasting funnel covers three processes,including ground uplift,fissure expansion and blocky rock throwing. There are obvious radial fractures with 45°inclination in rocks near the free surface,which indicates that the formation of blasting funnel is mainly controlled by tensile fracture. The moving velocity of the rock mass surrounding the explosives is relatively uniform at the moment of detonation. With the explosion going on,most of the rock masses are thrown along the vertical direction. The moving velocity of the rock mass in the 45°radial fracture is the fastest,and the blasting funnel volume is the largest when the explosive is buried at65 cm in depth.

关 键 词：爆破漏斗 SPH FEM 裂隙 数值模拟 

分 类 号：TD235[矿业工程—矿井建设]