黄金科学技术 ›› 2023, Vol. 31 ›› Issue (6): 930-943.doi: 10.11872/j.issn.1005-2518.2023.06.077
Honglu FEI(),Hainan JI(),Jie SHAN
摘要:
针对露天台阶剥离爆破块度大、根底多等不良爆破效果,采用炮孔底部与中部两段水介质间隔装药结构进行露天台阶爆破效果优化。从理论上分析了空气介质与水介质间隔装药爆破的炮孔压力,通过试验优化了水介质间隔装药结构的单耗,在选定的最优单耗基础上利用ANSYS/LS-DYNA数值仿真软件,建立3组不同水介质间隔装药结构的三维模型,通过分析得到最优的水介质间隔装药结构,并与空气介质间隔装药结构进行爆破对比试验。结果表明:水介质间隔装药结构爆破可以显著提高炮孔压力,从而改善岩石破碎效果;上、下部水介质间隔均为1 m的装药结构爆破作用于岩体的应力更大且持续时间长,其爆破效果最优;优选的水介质间隔装药结构块度指标均表现出良好的占比情况。研究结果能够为水介质间隔装药结构露天台阶爆破提供参考。
中图分类号:
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