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金属矿山 ›› 2017, Vol. 46 ›› Issue (10): 149-154.

• 采矿工程 • 上一篇    下一篇

基于Geo-Slope的南芬露天铁矿A区滑坡体稳定性分析

陈孝刚1,2,董瑞朝3,陶志刚4,庞仕辉4,张海江4   

  1. 1.航天建筑设计研究院有限公司 北京 100071;2.北京航天地基工程有限责任公司 北京 100070;3.中国石油工程建设有限公司华北分公司 河北 任丘 062550;4.深部岩土力学与地下工程国家重点实验室 北京 100083
  • 出版日期:2017-10-15 发布日期:2017-10-15
  • 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放基金(编号:PCMGH-2016-Z-02)。

Analysis on Stability of Landslide in the Area A of Nanfen Open-pit Iron Mine Based on Geo-Slope

Chen Xiaogang1,2,Dong Ruichao3,Tao Zhigang4,Pang Shihui4,Zhang Haijiang4   

  1. 1.China Aerospace Academy of Architectural Design & Research Co.,Ltd.,Beijing 100071,China;2.The Geotechnical Institute of Beijing Aerospace,Beijing 100070,China;3.China Petroleum Engineering & Construction Corporation North China Branch,Renqiu 062550,China;4.State Key Laboratory for Geomechanics & Deep Underground Engineering,Beijing 100083,China
  • Online:2017-10-15 Published:2017-10-15

摘要: 以南芬露天铁矿A区滑坡体为研究对象,利用Geo-Slope软件从理论解析和定量的角度,计算出边坡体的稳定性系数,并搜索出最危险滑动面,以及滑动面在外界影响作用下的变化特征。对边坡的稳定性状况进行深入分析研究后发现:开挖到334~328 m平台后,边坡块体基本处于极限平衡状态,此时应停止开挖,时刻密切观察边坡体的稳定状况,并做好人员、设备的撤场准备,待采取爆破或者降雨之后,边坡体产生滑动后再进场开挖。事实表明,在10月5日开挖到340 m平台时,遇上强降雨,370 m平台局部发生平面滑动,由于提前撤场,避免了较大的人员伤亡及经济损失。

关键词: 露天铁矿, 滑坡体, Geo-Slope, 滑动面, 稳定性分析

Abstract: Based on the landslide of Open-pit Iron Mine area A in Nanfen,the stability coefficient of the slope body is calculated,and the most dangerous sliding surface and the change of the sliding surface under the action of outside influences are searched out,from the views of theory analytical and quantitative method,by using Geo-Slope software.After through analysis and research on slope stability,it is found that the slope block was basically in a state of limit equilibrium when excavated to 334-328 platform.At this time,it should stop excavating,observed closely the stability condition of the slope body,and prepared for the evacuation of personnel and equipment.It was not excavated until the sliding occurs under the effect of blasting or rainfall.In fact,the 370 platform was slid locally in a heavy rain when the excavation arrived at 340m platform on October 5.It avoided the great casualties and economic losses due to the early withdrawal.

Key words: Open iron ore, Landslide, Geo-Slope, Sliding surface, Stability analysis