不同间隔介质对爆破效果影响研究  

Study on influence of different interval media on blasting effect

作　　者：张袁娟 ZHANG Yuanjuan(School of Safety Engineering,Henan Engineering College,Zhengzhou Henan 451191,China)

机构地区：[1]河南工程学院安全工程学院,河南郑州451191

出　　处：《化工矿物与加工》2019年第1期1-3,6,共4页Industrial Minerals & Processing

基　　金：国家自然科学基金(51104111);河南工程学院博士基金(D2013022);河南省教育厅科学技术研究重点项目(14B440005)

摘　　要：不同间隔介质对爆破效果影响显著,运用大型动力分析软件LS-DYNA分别对水和空气作为间隔介质的露天矿台阶爆破进行数值模拟,结合现场爆破试验,提出以最大主应力脉冲持续时间、振速衰减规律及间隔介质的力学特性为对象进行综合分析以确定合理的间隔介质。结果表明:水作为柔性介质,在爆轰压力的作用下,具有可压缩性,可以有效地、均匀地传递爆轰波,使岩石破碎得更加充分。The effect of different interval media on blasting effect is remarkable.The numerical simulation of the interval media of open-pit bench blasting with water and air was conducted using the large dynamic analysis software LS-DYNA.Based on the field test analysis,the duration of maximum principal stress pulse,the law of vibration velocity attenuation and the analysis of mechanical characteristics of interval media were proposed to determine reasonable interval media.The study results show that water,as a flexible medium,has compressibility under the action of detonation pressure,and can effectively and uniformly transmit detonation wave,so that rock is broken more fully.

关 键 词：间隔介质 爆破 峰值振速 爆破效果 最大主应力 

分 类 号：TD235[矿业工程—矿井建设]