Mechanism of subsidence-buckling and instability of slopes in thick-layered rigid rock under mining

作     者：DENG Jie ZHAO Jian-jun LAI Qi-yi LI Ai-nong XIE Ming-li LI Qing-miao ZHAO Xiao DENG Jie;ZHAO Jian-jun;LAI Qi-yi;LI Ai-nong;XIE Ming-li;LI Qing-miao;ZHAO Xiao

作者机构：State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengdu 610059China POWERCHINA Chengdu Engineering Corporation LimitedChengdu 610072China 

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

年 卷 期：2023年第20卷第8期

页      面：2370-2387页

核心收录：

学科分类：081901[工学-采矿工程] 081803[工学-地质工程] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：funded by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project(SKLGP2022Z001) National Natural Science Foundation of China(Grant No.41877273) Science and Technology Plan Project of Sichuan Province(Grant No.2021YJ0053) Sichuan Natural Science Foundation(Grant No.2022NSFSC1176) Innovative Research Groups of the National Natural Science Foundation of China(Grant No.41521002) POWERCHINA Science and technology project(Grant No.DJ-ZDXM-2020-03) 

主　　题：Mining landslide Failure mechanism Block structure Failure characteristics Soft-hard interbedding 

摘      要：The deformation and failure of mining slopes in layered rocks predominantly result from shear ***,the instability process of the Pusa rock avalanche in Guizhou,China,revealed a unique damage phenomenon:prominent breaking and toppling of rock blocks occurred in the central section of the mountain,with a lack of commonly observed shear landslide *** paper aims to investigate the underlying reasons behind this distinctive damage *** study employs various methods including geological survey,UAV aerial survey,physical simulation,and discrete element numerical *** findings indicate that the geological conditions,characterized by a hard upper layer and a soft lower layer along with underground mining activities,play a significant role in triggering the ***,the presence of a columnar structured rock mass emerges as the primary factor influencing the instability of the Pusa rock *** elucidate the mining failure mechanism of the rock mass with vertical joints,we propose asubsidence-bucklingfailure *** the subsidence and collapse of the roof rock mass in the goaf,the columnar rock mass in the upper and middle portions of the slope undergoes deflection and deformation,forming a three-hinged arch *** structural configuration converts the pressure exerted by the overlying rock mass into both vertical pressure and lateral *** the influence of external loads,the slope experiences buckling failure,ultimately leading to instability upon *** shedding light on these findings,this study contributes to a better understanding of the spatiotemporal evolution of mining slope fractures and their impact on slope stability.