岩体爆炸应力波衰减规律的颗粒流数值模拟  

Numerical Simulation of Stress Wave Attenuation of Rock

作　　者：陈文昭[1] 刘夕奇 李斌[1] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421000

出　　处：《南华大学学报（自然科学版）》2016年第1期118-123,共6页Journal of University of South China：Science and Technology

摘　　要：基于PFC2D离散元软件,首先对岩石的动力落锤实验进行模拟,获取岩体的动力学细观参数.随后建立了集中药包作用下岩体的爆破模型,对不同关键点处的应力波峰值进行了监测,得到了应力波在岩体传播过程中的衰减规律并与理论值进行对比,从爆破漏斗的形成和理论应力波衰减的拟合效果来看,PFC模拟爆破有潜在的优越性,能较好的再现爆破的整个过程,因此,可以预先利用数值手段为试验方案设计提供指导;为爆破的研究工作提供经济、简便而实用的方法.A model of drop-hammer experiment of rock is established by the aid of particle flow code in two dimensions, which gets the meso parameters of rock. Then, a blasting model of rock under the action of concentrated charge was also built, which moni- tored the peak of stress for different key point and got the attenuation low of stress wave in the progation of rock.This method of making blasting model has potential advantages from the view of fitting effect between foramtion and theoretical stress wave attenuation of blas- ting funnel, which can reproduce the whole process of blasting.Thus, numerical simulation can provide guidance for test scheme as well as economic, simple and practical method for the blasting work.

关 键 词：PFC2D 动力落锤 爆破漏斗 爆炸应力波衰减 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]