欢迎访问《金属矿山》杂志官方网站,今天是 分享到:
×

扫码分享

金属矿山 ›› 2017, Vol. 46 ›› Issue (05): 154-158.

• 安全与环保 • 上一篇    下一篇

南芬露天铁矿下盘采动时边坡稳定性数值模拟

周一君1,高毓山2,陶志刚3,王硕4,侯欣然5,张伟6   

  1. 1.北京工业大学建筑工程学院,北京 100124;2.本溪钢铁集团南芬露天铁矿,辽宁 本溪 117000;3.中国矿业大学(北京)力学与建筑工程学院,北京 100083;4.华北理工大学建筑工程学院,河北 唐山063009;5.华北理工大学矿业工程学院,河北 唐山 063009;6.华北理工大学轻工学院,河北 唐山 063000
  • 出版日期:2017-05-15 发布日期:2017-10-18
  • 基金资助:

    国家自然科学基金项目(编号:41502323),浙江省山体地质灾害防治协同创新中心开发基金项目(编号:PCMGH-2016-Z-02)。

Slope Stability Numerical Simulation of the Footwall Slope under Mining Conditions in Nanfen Open-pit Mine

Zhou Yijun1,Gao Yushan2,Tao Zhigang3,Wang shuo4,Hou Xinran5,Zhang Wei6   

  1. 1.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;2.Nafen Open-pit Iron Mine,Benxi Iron & Steel Group,Benxi 117000,China;3.School of Mechanics and Civil Engineering,China University of Mining and Technology (Beijing),Beijing,100083,China;4.College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063009,China;5.College of Mining Engineering,North China University of Science and Technology,Tangshan 063009,China;6.College of Qinggong,North China University of Science and Technology,Tangshan 063000,China
  • Online:2017-05-15 Published:2017-10-18

摘要: 通过分析南芬露天铁矿下盘边坡的区域地质资料,确定出降雨和爆破震动为影响边坡稳定性的主要因素。根据前期研究成果,对5#坡体剖面建立数值模拟计算模型,同时导入SLOPE/W模块,分析爆破和降雨耦合作用对扩帮前后边坡稳定性的影响。研究结果表明:岩体扩帮采动前后孔隙水压力变化不大,但是在近似梯形岩体开挖之后,一部分自重应力被消除,对边坡的地应力产生了显著影响。扩帮采动后的边坡在耦合作用下整体安全性变差,但依然保持稳定。286~454 m段属危险性边坡,454~574 m段边坡保持稳定。

关键词: 扩帮采动, Geo-studio, 爆破震动, 降雨, 边坡稳定

Abstract: The rainfall and blasting vibration are the main slope stability influence factors by analyzing the regional geological data of the footwall slope of of Nanfen Open-pit Iron Mine.Based on the early study results,the numerical simulation computational model of 5# slope profile is established,combing with SLOPE/W module,the influence of coupling effect of rainfall and blasting vibration to slope stability.The study results show that,the changes of pore water pressure is little before and after the rock mass expansion mining,however,after the excavation of approximately trapezoidal rock mass,a part of gravity stress is eliminated,which has a significant effect on the in-situ stress of slope.The whole safety of the slopes under the action of expansion is deteriorated,but the stability of slope remains stable.The slope section of 286~454 m is belongs to the dangerous slope,the stability of slope section of 454~474 m is good.

Key words: Expansion mining, Geo-studio, Blasting vibration, Rainfall, Slope stability