摘要
为了研究微差时间对爆破效果的影响,运用LS-DYNA显式非线性动力分析有限元程序对有无微差时间台阶爆破进行数值模拟,通过峰值振速得出微差爆破有明显的降低爆破振动作用.选取双炮孔连线中点单元,通过最大主应力进行分析,得出两种工况该处最大主应力均大于岩石动态抗拉强度,对爆破效果无影响.峰值振速结合最大主应力分析扩充了爆破参数理论的研究方法,为相关爆破参数的优化提供了新的参考.
In order to study the effect of millisecond time on the blasting effect,FEM program of LS-DYNA is used,the bench blasting with or without millisecond delay time are made,it is concluded that the millisecond delay time can reduce the peak vibration velocity obviously. And selecting the intermediate unit of the double explosion hole connection,through the analysis of the maximum principal stress,the maximum principal stress of two kinds working conditions are greater than the dynamic tensile strength of rock,and the effect of blasting is not affected. The analysis method of the maximum principal stress and the peak particle velocity can extend the theoretical analysis method of the blasting parameters,which provides a new method for the optimization of the related parameters.
出处
《河南工程学院学报（自然科学版）》
2016年第2期29-31,共3页
Journal of Henan University of Engineering：Natural Science Edition
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)
郑州市科技攻关项目(141PPTGG375)
关键词
台阶爆破
数值模拟
LS-DYNA
微差爆破
峰值振速
最大主应力
bench blasting
numerical simulation
LS-DYNA
millisecond blasting
peak particle velocity
maximum principal stress
