Assessment of the Impact of Backfill Mining on Goaf Stability and Optimization of Stope Structural Parameters: A Case Study of the +180m Level at Liangjiang Fluorite Mine, Guangdong Province
ID:196 View Protection:ATTENDEE Updated Time:2026-08-04 10:08:27 Hits:21 Oral Presentation

Start Time:2026-08-11 17:10(Asia/Hong_Kong)

Duration:15min

Session:S9 Session 9 Mine Geological Hazards and Ecological Restoration » S9Session 9 Day 3

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Abstract
针对矿山爆破作业对邻近关键构造的动态影响问题,以广西福子矿业中段138米的井井为研究对象,基于LS-DYNA显式动力学方法,构建了一个覆盖矿体和井井的准三维有限元模型。系统比较了四种爆破方案(全孔同步起爆、装药控制、井内毫秒和行毫秒)下的升降井振动响应。通过比较和分析振动速度峰值、应力波传播特性及能量叠加效应,揭示了毫秒爆破的振动减缓机制。结果显示,采用17毫秒井内毫秒或60毫秒间毫秒起始技术,可以将电梯井X方向峰值振动速度从10.6厘米/秒降至6.48厘米/秒(下降38.9%),这大大抑制了应力波叠加效应。本研究为高地面应力矿体的安全高效爆破提供了理论支持和优化范式。针对矿山爆破作业对邻近关键结构的动态影响问题,以广西佛子矿业138米中段的电梯井为研究对象,基于LS-DYNA显式动力分析方法,构建了涵盖矿体与电梯井的准三维有限元模型。系统比较了四种爆破方案(全孔同步起爆、装药控制、孔内毫秒和排间毫秒)下电梯井的振动响应。通过对比分析振动速度峰值、应力波传播特征及能量叠加效应,揭示了毫秒爆破的减振机理。结果表明,采用17毫秒孔内微差起爆或60毫秒排间微差起爆技术,可将电梯井X向峰值振动速度由10.6 cm/s降低至6.48 cm/s,降幅达38.9%,从而显著抑制了应力波叠加效应。本研究为高地应力矿体的安全高效爆破提供了理论支撑与优化范式。
Keywords
Blast Loading, Dynamic Response, Numerical Simulation, LS-DYNA, Millisecond Blasting, Vibration Control
Speaker
Zijun Ren
Student Central South University

Submission Author
Zijun Ren Central South University
Kepin Zhou Central South University
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Important Date
  • Conference Date

    Aug 09

    2026

    to

    Aug 13

    2026

  • Aug 06 2026

    Draft paper submission deadline

  • Aug 12 2026

    Registration deadline

Sponsored By
The Hong Kong Polytechnic University
Organized By
International Consortium on Geo-disaster Reduction (ICGdR)
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