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Numerical simulation analysis of reasonable interval charging length in open deep-hole blasting

机译：深孔爆破合理区间装药长度的数值模拟分析

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摘要

In order to study the influences of interval charge length of the open deep-hole blasting on the rock crushing, propagation change rule of explosive stress in the rock under the condition of different interval length and resistance line is studied in this paper based on ANSYS/LS-DYNA finite element numerical simulation method.The simulation results show that the interval length is related to the resistance line.When the interval length is a fixed value, there would be a critical length of resistance line.The two linear charges act on the rock alone, boulder yield will be increased between interval medium and the free face, and the utilization rate of the blasting energy will significantly reduce, when the length is less than the critical value.Through the analysis of the stress change rule, the interval length is better to take less than a third of resistance line in the open deep-hole blasting and other blasting engineering.
机译：为了研究露天深孔爆破的间隔装药长度对岩石破碎的影响，本文基于ANSYS /研究了不同间隔长度和阻力线条件下岩石中爆炸应力的传播变化规律。 LS-DYNA有限元数值模拟方法，仿真结果表明，间隔长度与电阻线有关，当间隔长度为固定值时，电阻线会出现临界长度，两个线性电荷作用于电阻线。当长度小于临界值时，仅在岩石中，间隔介质与自由面之间的巨石屈服将增加，爆破能量的利用率将显着降低。最好在露天深孔爆破和其他爆破工程中采用小于阻力线三分之一的位置。

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  • 来源
  • 会议地点 Xian(CN)Xian(CN)
  • 作者

    X.Wu; Y.P.Zhang; X.X.Zhu; C.S.Wu;

  • 作者单位

    College of Mine Engineering, Hebei United University, Tangshan, Hebei, China;

    Hebei Province Key Laboratory of Mining Development and Safety Technique, Tangshan, Hebei, China;

    College of Mine Engineering, Hebei United University, Tangshan, Hebei, China;

    Hebei Province Key Laboratory of Mining Development and Safety Technique, Tangshan, Hebei, China;

    College of Mine Engineering, Hebei United University, Tangshan, Hebei, China;

    Hebei Province Key Laboratory of Mining Development and Safety Technique, Tangshan, Hebei, China;

    College of Mine Engineering, Hebei United University, Tangshan, Hebei, China Hengsheng Blasting Company, Tangshan, Hebei, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 岩石学;
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