黑龙江科技大学学报2016，Vol.26Issue(6)：705-709,5.DOI:10.3969/j.issn.2095-7262.2016.06.024
爆炸应力波作用下岩石双孔爆破的数值模拟
Numerical simulation of two-hole blasting of rock under effect of explosion-induced stress waves
摘要
Abstract
This paper makes an effort to investigate the rock failure process in two-hole blasting of rock by performing a numerical simulation of drilling blasting of rock with two blast holes under the effect of explosion-induced stress waves using the discontinuous deformation analysis (DDA) method.The investigation demonstrates that,given the same rock parameters,the way only one of the blast holes is loaded leads to the likelihood that the presence of the unloaded one produces an effect on crack generation and propagation in the model,with a resulting reduction in the rock failure region and extent;and the way both blast holes are loaded makes it likely that the loading delay between the holes,may afford a decrease in the rock fragmentation region and the secondary cracks outside the region,and the blasting-induced vibration,as compared with the simultaneous loading condition.The research conducts an analysis of the stress wave propagation process in the rock and its effect on the rock blast simulation,and provides rock failure process and its mechanism behind the two-hole blasting of rock subjected to the effect of explosion-induced stress waves.关键词
双孔爆破/岩石破碎/爆炸应力波/非连续变形分析(DDA)Key words
two-hole blasting/rock fragmentation/explosion-induced stress wave/discontinuous deformation analysis (DDA)分类
矿业与冶金引用本文复制引用
甯尤军,江成,杨正..爆炸应力波作用下岩石双孔爆破的数值模拟[J].黑龙江科技大学学报,2016,26(6):705-709,5.基金项目
国家自然科学基金项目(51204137) （51204137）
西南科技大学杰出青年科技人才支持计划项目(13zx9103) （13zx9103）
西南科技大学研究生创新基金项目(16ycx108) （16ycx108）
