露天矿节理参数敏感性研究及边坡稳定性分析  

Study on the Sensitivity of Joint Parameters and Slope Stability Analysis of Open-pit Mine

作　　者：黄笃学 董鑫[2] 王建曦 杨天鸿[2] 王少泉[3] 何祥 Huang Duxue;Dong Xin;Wang Jianxi;Yang Tianhong;Wang Shaoquan;He Xiang(Hebei Iron and Steel Group Mining Co.,Ltd.,Tangshan 063009,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Northern Engineering&Technology Corporation of MCC,Dalian 116622,China)

机构地区：[1]河北钢铁集团矿业有限公司,河北唐山063009 [2]东北大学资源与土木工程学院,辽宁沈阳110819 [3]中冶北方工程技术有限公司,辽宁大连116622

出　　处：《金属矿山》2020年第3期64-70,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:U1903216);“十三五”国家重点研发计划项目(编号:2016YFC0801602)。

摘　　要：随着新疆金宝铁矿的不断开采,一些不利于边坡稳定性地质构造被逐渐揭露,增加了边坡的不稳定性,致使现场边坡出现了多种模式的破坏,对矿山生产与人员安全造成了严重威胁。为研究该矿边坡大量揭露的节理对边坡稳定性产生的影响,首先采用三维摄影不接触测量方法测定了边坡岩体结构面的几何参数,结合工程地质条件与边坡几何要素,将边坡岩体进行了质量分级分区,根据岩石力学试验确定了各分区边坡的岩体力学参数;然后运用正交试验法,量化了节理倾角、内摩擦角、黏聚力、抗拉强度和刚度对滑坡概率的贡献程度,得到了节理参数对边坡稳定性的影响规律;最后基于有限元极限平衡法对Ⅳ-1区域边坡进行了模拟计算,并给出了稳定性评价结果。研究表明:边坡节理倾角、内摩擦角、黏聚力是控制滑坡破坏模式的主要因素,金宝矿Ⅳ-1区域边坡处于稳定状态。With the continuously exploitation of Xinjiang Jinbao Iron Mine,some geological structures that are not conducive to the slope stability are gradually exposed,increasing the instability of the slope and causing multiple modes of failure of the slope,which brings about a serious threat to the safety of mine production and working staff.In order to study the influence of a large number of joints exposed on the stability of the slope in Jinbao Mine,firstly,the 3 D photographic non-contact measurement method is used to measure the geometric parameters of the structural plane of the slope rock mass,the quality of the slope rock mass is divided into different areas according to the engineering geological conditions and the geometric elements of the slope,and the rock mass mechanical parameters of each area are determined through the test of rock mechanics.Then,by the orthogonal experimental method,the contribution degrees of the dip of joint,internal friction angle,cohesion,tensile strength and tensile rigidity to the landslide probability are quantified,so as to obtain the influence laws of joint parameters on the slope stability.Finally,the slope in IV-1 area is simulated by using the finite element limit equilibrium method,and the slope stability evaluation result is given.The study results show that the dip of joint,internal friction angle and cohesion of the slope are the main factors to control the failure modes of the landslide,the slope in the IV-1 area of Jinbao Mine is in a stable state.

关 键 词：露天开采 边坡 结构面 正交试验 稳定性评价 

分 类 号：TD854[矿业工程—金属矿开采]