某深凹露天矿复杂边坡稳定性数值模拟及加固措施研究  

Numerical simulation of complex slope stability and reinforcement measures in a deep concave open-pit mine

作　　者：梁源贵 周宗红[2] 侯廷凯 黄耀春 孙慧珍 LIANG Yuangui;ZHOU Zonghong;HOU Tingkai;HUANG Yaochun;SUN Huizhen(Heqing Beiya Mining Co.,Ltd.,Dali Yunnan 671000,China;Kunming University of Science and Technology,Kunming 650093,China;Yunnan Geological and Mineral Construction Engineering Co.,Ltd.,Kunming 650200,China)

机构地区：[1]鹤庆北衙矿业有限公司,云南大理671000 [2]昆明理工大学,昆明650093 [3]云南地矿建设工程有限责任公司,昆明650200

出　　处：《有色金属(矿山部分)》2025年第1期65-71,81,共8页NONFERROUS METALS(Mining Section)

基　　金：国家自然科学基金资助项目(52264019)。

摘　　要：某金矿现阶段采用露天开采的方式进行生产,已形成高度约400 m的边坡,西部边坡等区域受多个交汇断层的影响发生了失稳滑移,严重威胁矿山安全生产。随着开采深度的不断增大,边坡稳定性进一步下降,急需对边坡的稳定性及支护手段展开研究。在相关室内试验的基础上,采用数值模拟方法,建立了采场三维立体模型,从应力、位移和剪切应变增量的角度对研究区域扩帮至最终境界过程中的稳定性进行分析,并提出相应的加固方案。结果表明:随着开挖的持续,受断层、自重地+下水+地震的影响,露天边坡逐渐进入欠稳定状态,最终失稳;当在断层区域采用锚固段长度12 m、自由段长度分别为25、36及37 m、倾角20°、间距4 m的预应力锚索进行加固后,边坡可以保持稳定。研究结果为矿山设计和生产提供理论依据。At present,a certain gold mine adopts open-pit mining for production,which has formed a slope with a height of about 400 m.The western slope and other areas have been affected by multiple intersection faults and have experienced instability and sliding,seriously threatening the safety of mining production.As the mining depth continues to increase,the stability of the slope further decreases,and there is an urgent need to conduct research on the stability and support methods of the slope.On the basis of relevant indoor experiments,numerical simulation methods were used to establish a three-dimensional model of the mining area.From the perspectives of stress,displacement and shear strain increment,the stability of the study area during the expansion process to the final boundary was analyzed,and corresponding reinforcement schemes were proposed.The results showed that as excavation continued,the open-pit slope gradually entered an unstable state due to the influence of faults,self-weight ground,groundwater and earthquake,and ultimately became unstable.When prestressed anchor cables with anchorage length of 12 m,free length of 25 m,36 m,and 37 m,inclination angle of 20°and spacing of 4m were used in the fault area for reinforcement,the slope could remain stable.The research results provide theoretical basis for mine design and production.

关 键 词：露天边坡 边坡稳定 数值模拟 FLAC3D 支护 

分 类 号：TD852[矿业工程—金属矿开采] TD854.6[矿业工程—矿山开采]