基于运动学分析的露天矿岩质边坡优势结构面确认方法及其工程应用  

The Method of Determining the Preferred Structural Plane of Rock Slope in Open-Pit Mine Based on Kinematics Analysis and Its Engineering Application

作　　者：邓骐宁 DENG Qining(State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Resources,Longyan,Fujian 364204,China;Zijin(Changsha)Engineering Technology Co.,Ltd.,Changsha,Hunan 410036,China)

机构地区：[1]低品位难处理黄金资源综合利用国家重点实验室,福建龙岩市364204 [2]紫金(长沙)工程技术有限公司,湖南长沙410036

出　　处：《矿业研究与开发》2024年第7期80-86,共7页Mining Research and Development

基　　金：“十四五”国家重点研发计划项目(2022YFC2903904)。

摘　　要：边坡优势结构面的确认是进行矿山岩质边坡稳定性分析的重要前提工作。考虑到不同岩体结构面产状与边坡产状的相互空间关系对边坡稳定性的影响差异,提出一种基于运动学分析的优势结构面确认方法。首先,采用赤平极射投影将结构面产状数据投射至极点等密度图上;进而引入运动学分析方法分析并筛选出不同边坡破坏模式下对边坡稳定性有影响的产状数据;最后,对筛选后的产状数据进行聚类分析,得出边坡优势结构面。将该方法应用于某铁矿岩质边坡滑塌实例,结果表明,通过基于运动学分析的露天矿岩质边坡优势结构面确认方法得出的优势结构面分组结果合理可靠,具有较高的精确度,验证了该方法具有较好的工程应用价值。The confirmation of the preferred structural plane of the slope is a crucial prerequisite for conducting stability analysis on mine rock slopes.Considering the difference in the influence of the spatial relationship between the occurrence of different rock mass structural planes and the slope occurrence on the slope stability,a method for confirming the preferred structural plane based on kinematics analysis was proposed.Firstly,the occurrence data of structural plane were projected onto the pole isodensity map by stereographic projection.Furthermore,the kinematics analysis method was introduced to analyze and screen out the occurrence data that affect the slope stability under different slope failure modes.Finally,cluster analysis was carried out on the screened occurrence data,and the preferred structural plane of the slope was obtained.The method was applied to an example of rock slope collapse in an iron mine.The results show that the grouping results of preferred structural plane obtained by the method for confirming the preferred structural plane of rock slope in open-pit mine based on kinematics analysis are reasonable and reliable,with high accuracy,which verifies that the method has good engineering application value.

关 键 词：优势结构面 运动学分析 赤平极射投影 露天矿岩质边坡 

分 类 号：TD854.6[矿业工程—金属矿开采] TU223.1[矿业工程—矿山开采]