黄金科学技术 ›› 2019, Vol. 27 ›› Issue (2): 241-248.doi: 10.11872/j.issn.1005-2518.2019.02.241
Xiaohan LI(),Kewei LIU(),Jiacai YANG,Xudong LI
摘要:
为研究岩石在不同地应力下的爆破振动效应,选择经验证过的岩石本构,利用ANSYS/LS-DYNA隐式—显式序列求解方法,对不同侧压力系数下岩石爆破过程进行数值分析。分别构建了侧压力系数为0.1、0.5、1.0、2.0、4.0条件下的计算模型,数值模拟结果表明:初始地应力对爆破有较强的抑制作用,岩石破碎区受侧压力系数的影响较小,爆破裂纹优先向较大的地应力方向延伸;岩石质点振动速度峰值(PPV)到达时间不受侧压力系数的影响;当侧压力系数小于1.0时,水平方向的质点振动速度峰值大于竖直方向;当侧压力系数大于1.0时,竖直方向的质点振动速度峰值大于水平方向。
中图分类号:
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