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金属矿山 ›› 2010, Vol. 39 ›› Issue (01): 48-50.

• 采矿工程 • 上一篇    下一篇

露天转地下开采围岩稳定性数值模拟分析

王军   

  1. 1.山东理工大学;2.北京科技大学
  • 出版日期:2010-01-15 发布日期:2010-11-09
  • 基金资助:

    山东省科技攻关(编号:2008GG10006016)。

Numerical Simulation Analysis on Wall Rock Stability in Transition from Open Pit to Underground Mining

 WANG  Jun   

  1. 1.Shandong University of Technology;2University of Science and Technology Beijing
  • Online:2010-01-15 Published:2010-11-09

摘要: 采用有限元数值模拟方法,研究露天转地下开采中次生应力对巷道围岩稳定性影响。分析结果表明,水平应力对围岩稳定性有重要影响,侧压系数大于0.5,水平应力对围岩产生不利影响;侧压系数大于2.0,不利影响迅速扩大。围岩中存在铰接拱结构,围岩体通过这种结构来承担上部荷载。

关键词: 露天转地下开采, 侧压系数, 水平应力

Abstract: The influence of induced stress on wall rock stability under transition from open pit to underground mining was researched by the finite element numerical simulationIt is indicated that plane stress greatly influence the wall rock stabilityWhen the side press modulus is over 0.5,the plane-stress has a disadvantage influence on wall rock; When the side press modulus is over 2.0,the disadvantage influence extends rapidlyThe ream arch structure exists in wall rock which can undertake the upside load through this structure.

Key words: Transition from open pit to underground mining, Side press modulus, Plane-stress