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金属矿山 ›› 2011, Vol. 40 ›› Issue (09): 1-4.

• 采矿工程 •    下一篇

大红山铁矿400 m以上坑采对露采的影响

张志雄,余南中,魏建海,杨泽,陈发兴   

  1. 昆明有色冶金设计研究院股份公司
  • 出版日期:2011-09-13 发布日期:2011-09-19
  • 基金资助:

    * 云南省社会发展科技计划项目(编号:2009ZC020M)。

Influence on 400 m Above Ore-body Excavation on Open Pit in Dahongshan Iron Mine

Zhang Zhixiong,Yu Nanzhong,Wei Jianhai,Yang Ze,Chen Faxing   

  1. Kunming Engineering & Research Institute of Nonferrous Metallurgy Co.,Ltd.
  • Online:2011-09-13 Published:2011-09-19

摘要: 地下崩落法采矿破坏了采场上覆岩层的应力平衡状态,引起地表变形和岩层移动,影响到地表构筑物的安全使用与保护问题。深部矿体采用崩落法开采,将会影响到地表露天采场境界的稳定。采用FLAC3D数值模拟的方法来研究深部矿体开采后对露采境界的影响。模拟分析表明:按照65°移动角计算,预留保安矿柱,400 m水平以上南部矿体开挖后,并未影响到露采境界,露天工程整体稳定。但是不预留保安矿柱, 400 m以上矿体全部开挖后,影响到了A34线以西的露采境界。研究结果为地表露天矿的设计和安全生产提供了指导性的依据。  

关键词: 坑采, 露采境界, FLAC3D, 安全

Abstract: Stress equilibrium state of stope overburden is destroyed by underground caving mining,which causes the surface distortion and rock layer movement,so the surface construction safety is affected.Because deep ore-body of  Dahongshan is exploited with caving,which will affect the stability of open pit.Influence of ore-body excavation on open pit was studied by FLAC3D numerical simulation method.The results showed that security pillar reserved,the southern ore-body excavation at 400 m above don't affect open pit by calculating the movement angle of 65°,so open project is still stable overall.But if security pillar is not reserved,open pit would be affected by ore-body excavation at 400 m above.The research results could offer instructive basis for safety production of open pit

Key words: Underground mining, Open pit, FLAC3D, Security