深孔连续与间隔装药爆破数值模拟研究  

Numerical Simulation of Continuation and Interval Loading in Deep-hole Blasting

作　　者：曲艳东[1] 吴敏[1] 孔祥清[1] 马石磊 

机构地区：[1]辽宁工业大学土木建筑工程学院,锦州121001 [2]河北宣化钢盛建筑安装有限责任公司,宣化075100

出　　处：《爆破》2014年第4期16-21,81,共7页Blasting

基　　金：国家自然科学基金项目(11302094;11302093);辽宁省教育厅项目(L2011095;L2012221)

摘　　要：基于大型非线性动力学分析软件LS-DYNA,采用岩石材料的JHC本构模型,模拟了深孔连续与间隔装药爆破时的压力场、应力场以及速度场发展过程,分析了装药结构不同和起爆方式不同对爆破效果的影响。研究表明:与连续装药结构相比,中部间隔装药结构能够降低初始压力峰值,降低炸药单耗,减少爆破产生的震动效应,改善爆破效果。对于中部间隔装药结构,在不存在时差的前提下,底部起爆可提高能量利用率,而中部起爆可减小爆破震动。Based on the large nonlinear dynamics analysis software LS-DYNA,the change processes of pressure field,stress field and velocity field of the deep-hole blasting with continuation and interval loading were simulated by the JHC constitutive model of rock material and the blasting effect for different loading structures and different igni-tion methods were compared. Results showed that the interval charging structure reduced the initial pressure peak and the consumption of explosives,decreased the vibration effect of blasting and improved the blasting effect. For the cen-tral interval charging structure without blasting delay time,the bottom initiation method improved the utilization rate of energy,while the central initiation method decreased the blasting vibration.

关 键 词：深孔爆破 连续装药 间隔装药 爆炸地震波 

分 类 号：TD235.1[矿业工程—矿井建设]