Quantitative hazard assessment system(Has-Q) for open pit mine slopes

作     者：Tatiana Barreto dos Santos Milene Sabino Lana Tiago Martins Pereira Ismet Canbulat 

作者机构：Mining Engineering DepartmentUniversidade Estadual de Minas GeraisJoao Monlevade 35930314Brazil Mining Engineering DepartmentUniversidade Federal de Ouro PretoOuro Preto 35400000Brazil Statistical DepartmentUniversidade Federal de Ouro PretoOuro Preto 35400000Brazil School of Minerals and Energy Resources EngineeringUniversity of New South WalesSydneyNSW 2052Australia 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2019年第29卷第3期

页      面：419-427页

核心收录：

学科分类：0819[工学-矿业工程] 0709[理学-地质学] 0808[工学-电气工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Federal Agency for Support and Evaluation of Graduate Education (CAPES – Brazil, Grant ID 19/2016) Fondation for Research Support of Minas Gerais (FAPEMIG – Brazil) University of New South Wales (UNSW – Australia) 

主　　题：Hazard assessment Risk analysis Open pit mine slopes Multivariate statistics 

摘      要：Rock slope hazard assessment is an important part of risk analysis for open pit mines.The main parameters that can lead to rock slope failures are the parameters traditionally used in geomechanical classifications,the slope geometrical parameters and external factors like rainfall and blasting.This paper presents a methodology for a hazard assessment system for open pit mine slopes based on 88 cases collated around the world using principal components analysis,discriminant analysis and confidence ellipses.The historical cases used in this study included copper,gold,iron,diamond,lead and zinc,platinum and claystone mines.The variables used in the assessment methodology are uniaxial compressive strength of intact rock;spacing,persistence,opening,roughness,infilling and orientation of the main discontinuity set;weathering of the rock mass;groundwater;blasting method;and height and inclination of the pit.While principal component analysis was used to quantify the data,the discriminant analysis was used to establish a rule to classify new slopes about its stability condition.To provide a practical hazard assessment system,confidence ellipses were used to propose a hazard graph and generate the HAS-Q.The discriminant rule developed in this research has a high discrimination capacity with an error rate of 11.36%.