摘要
为了确定巴润矿24 m高台阶孔内微差爆破合理起爆点位置组合,在采用常规高台阶爆破参数的条件下,依据毫秒微差爆破机理,利用非线性动力分析软件ANSYS/LS-DYNA对孔内微差爆破不同起爆点的起爆时间顺序组合进行了数值模拟对比,分析得出高台阶炮孔孔内微差起爆应力场规律及孔内微差起爆顺序的组合为下部低端先起爆,上部顶端延期间隔起爆效果最佳。
In order to determine the reasonable starting point combination of the millisecond blasting in the 24 m high step hole of Barun mine,the nonlinear dynamic analysis software ANSYS/LS-DYNA is used to make the hole according to the millisecond blasting mechanism under the condition of the conventional high step blasting parameters.The numerical simulation and comparison analysis of the time series of different detonation points in the inner differential blasting are carried out.It is concluded that the combination of the differential detonation stress field law and the in-hole differential detonation sequence in the high step blasthole is the lower low-end first detonation,the upper part,the top delay interval has the best detonation effect.
作者
常建平
王梦瑶
张鹏飞
宝音吉雅
CHANG Jianping;WANG Mengyao;ZHANG Pengfei;BAO Yinjiya(Inner Mongolia University of Science and Technology,Baotou 014010,China;Barun Mining Co.,Ltd.,Baotou Steel Group,Baotou 014080,China)
出处
《中国矿业》
北大核心
2020年第4期136-140,174,共6页
China Mining Magazine
基金
内蒙古科技大学矿业研究院重点项目资助
白云鄂博西矿24米高台阶扩帮爆破技术研究与应用项目资助
包钢股份技开合字(2018)第002号项目资助
内蒙古自治区高等学校科学研究项目资助(编号:NJYT-20-A21)
内蒙古自治区自然科学基金项目资助(编号:2019MS05011)。
关键词
高台阶
微差爆破
数值模拟
应力场规律
起爆顺序
high step
millisecond blasting
numerical simulation
stress field law
detonation sequence
