Classification and rating of disintegrated dolomite strata for slope stability analysis  

作　　者：Wenlian Liu Xinyue Gong Jiaxing Dong Hanhua Xu Peixuan Dai Shengwei Zhang 

机构地区：[1]Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming,650051,China [2]Key Laboratory of Geotechnical Engineering and Geological Disasters of Yunnan Province,Kunming,650051,China [3]Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming,650500,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第7期2552-2562,共11页岩石力学与岩土工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42162026);the Applied Basic Research Foundation of Yunnan Province(Grant No.202201AT070083).

摘　　要：Although disintegrated dolomite,widely distributed across the globe,has conventionally been a focus of research in underground engineering,the issue of slope stability issues in disintegrated dolomite strata is gaining increasing prominence.This is primarily due to their unique properties,including low strength and loose structure.Current methods for evaluating slope stability,such as basic quality(BQ)and slope stability probability classification(SSPC),do not adequately account for the poor integrity and structural fragmentation characteristic of disintegrated dolomite.To address this challenge,an analysis of the applicability of the limit equilibrium method(LEM),BQ,and SSPC methods was conducted on eight disintegrated dolomite slopes located in Baoshan,Southwest China.However,conflicting results were obtained.Therefore,this paper introduces a novel method,SMRDDS,to provide rapid and accurate assessment of disintegrated dolomite slope stability.This method incorporates parameters such as disintegrated grade,joint state,groundwater conditions,and excavation methods.The findings reveal that six slopes exhibit stability,while two are considered partially unstable.Notably,the proposed method demonstrates a closer match with the actual conditions and is more time-efficient compared with the BQ and SSPC methods.However,due to the limited research on disintegrated dolomite slopes,the results of the SMRDDS method tend to be conservative as a safety precaution.In conclusion,the SMRDDS method can quickly evaluate the current situation of disintegrated dolomite slopes in the field.This contributes significantly to disaster risk reduction for disintegrated dolomite slopes.

关 键 词：Disintegrated dolomite slope Basic quality(BQ) Slope stability probability classification (SSPC) Rock mass quality classification Limit equilibrium method(LEM) 

分 类 号：TU433[建筑科学—岩土工程]