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Deformation features and failure mechanism of steep rock slope under the mining activities and rainfall

Deformation features and failure mechanism of steep rock slope under the mining activities and rainfall

作     者:LI Zhi-qiang XUE Yi-guo LI Shu-cai ZHANG Le-wen WANG Dan LI Bin ZHANG Wen NING Kai ZHU Jian-ye 

作者机构:Research Center of Geotechnical and Structural EngineeringShandong University ResourcesInstitute of GeomechanicsChinese Academy of Geological Sciences College of Construction EngineeringJilin University 

出 版 物:《Journal of Mountain Science》 (山地科学学报(英文))

年 卷 期:2017年第14卷第1期

页      面:31-45页

核心收录:

学科分类:081901[工学-采矿工程] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0303[法学-社会学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0705[理学-地理学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0706[理学-大气科学] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学(可授工学、农学学位)] 

基  金:financially supported by a grant from China Natural Science foundation (51379112,51422904) the National Program on Key Basic Research Project of China (973 Program)(2013CB036002) the National Natural Science Foundation of China (51309144) 

主  题:Slope deformation Underground mining Discrete Element Method Site monitoring system 

摘      要:Underground mining activities and rainfall have potential important influence on the initiation and reactivation of the slope deformations,especially on the steep rock slope. In this paper,using the discrete element method(UDEC),numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city,China. Mechanical parameters of the rock mass have been determined by situ measurements and laboratory measurements. A preliminary site monitoring system has been realized,aiming at getting structure movements and stresses of unstablerock masses at the most significant discontinuities. According to the numerical model calibrated based on the monitoring data,four types of operation conditions are designed to reveal the effect of mining excavation and extreme rainfall on the deformation of the steep rock slope.

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