Geostructures, dynamics and risk mitigation of high-altitude and long- runout rockslides  

作　　者：Yueping Yin Bin Li Yang Gao Wenpei Wang Shilin Zhang Nan Zhang 

机构地区：[1]China Institute of Geological Environment Monitoring,China Geological Survey,Beijing,100081,China [2]Key Laboratory of Active Tectonics and Geological Safety,Ministry of Natural Resources,Beijing,100081,China [3]Institute of Geomechanics,Chinese Academy of Geological Sciences,China Geological Survey,Beijing,100081,China [4]Department of Geological Engineering,Southwest Jiaotong University,Chengdu,610031,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2023年第1期66-101,共36页岩石力学与岩土工程学报（英文版）

基　　金：This work was financially supported by National Natural Science Foundation of China(Grant Nos.U2244226,U2244227 and 42177172).

摘　　要：Long-runout rockslides at high altitude could cause disaster chain in river basins and destroy towns and major infrasturctures.This paper firstly explores the initiation mechanism of high-altitude and long-runout rockslides.Two types of sliding-prone geostructure models,i.e.the fault control type in orogenic belt and the fold control type in platform area,are proposed.Then,large-scale experimental apparatus and associated numerical simulations are conducted to understanding the chain-style dynamics of rockslide-debris avalanche-debris flow.The results reveal the fragmentation effects,the rheological behaviors and the boundary layer effect of long-runout avalanche-debris flow.The dynamic character-istics of quasi-static-transition-inertia state and solid-liquid coupling in rapid movement of rockslide-debris avalanche-debris flow are investigated.Finally,the risk mitigation strategy of the non-structure and structure for resilient energy dissipation are illustrated for initiation,transition and deposition zones.The structural prevention and mitigation methods have been successfully applied to the high-altitude and long-runout rockslides in Zhouqu and Maoxian of the Wenchuan earthquake zone,as well as the other major geohazards in Qinghai-Tibet Plateau and its adjacent areas.

关 键 词：ROCKSLIDE High-altitude and long-runout Sliding-prone geostructure Large-scale experimental apparatus Risk mitigation strategy Structural prevention technique 

分 类 号：P642.22[天文地球—工程地质学]