强降雨作用下川西地区大型露天矿坑古滑坡复活特性  

Revival Characteristics of Ancient Landslide in Large Open Pit in Western Sichuan under Heavy Rainfall

作　　者：潘明慧 王其光 江山 左良栋 PAN Minghui;WANG Qiguang;JIANG Shan;ZUO Liangdong(Chongqing Engineering Corporation Limited if Power China,Chongqing 401100,China;Institute of Aeronautics and Astronautics,Shanghai Jiaotong University,Shanghai 200240,China;Chongqing Nearspace Innovation Research and Development Center of Shanghai Jiaotong University,Chongqing 401120,China;Chongqing College of Architecture and Technology,Chongqing 401100,China)

机构地区：[1]中电建重庆勘测设计研究院有限公司,重庆401100 [2]上海交通大学航空航天学院,上海200240 [3]上海交通大学重庆临近空间创新研发中心,重庆401120 [4]重庆建筑科技职业学院建筑工程学院,重庆401331

出　　处：《科技和产业》2024年第22期272-279,共8页Science Technology and Industry

基　　金：中电建华东勘测设计研究院科技项目(HDEC-KJ-2022-CQ01);重庆市教委科学技术研究计划项目(KJZD-K202305201);重庆市交通科技项目(CQJT-ZCXM2023-12)。

摘　　要：川西地区地处青藏高原与四川盆地的过渡地带,地质活动频繁,加之区域内的河流、冰川、降雨等复杂因素的叠加作用,导致诸多古滑坡体群的存在。露天矿的开采是一个持续时间很长的人类活动,不仅会改变原有区域内的地貌特征,更有可能会诱发古滑坡体的复活。强降雨是引发地质灾害的重要诱因之一,以其作为主要诱因,结合相关监测数据,分析川西地区大型露天矿坑古滑坡变形诱发因素类型,得到古滑坡变形与降雨的响应关系,建立有限元计算模型,计算分析强降雨作用下古滑坡的渗流特性,变形特征,稳定性变化规律,并揭示此类古滑坡的复活机制。研究成果对加深对川西地区大型露天矿坑古滑坡的认识有参考价值,并对完成有关滑坡的治理和降雨作用下的灾害预防具有重要意义。Western Sichuan is located in the transitional zone between the Qinghai-Tibet Plateau and the Sichuan Basin,with frequent geological activities and the superposition of complex factors such as rivers,glaciers and rainfall in the region,resulting in the existence of many ancient landslide groups.Open-pit mining is a long-lasting human activity,which will not only change the geomorphological characteristics in the original area,but also induce the revival of ancient landslides.Heavy rainfall is one of the important causes of geological disasters.Taking it as the main cause,combined with relevant monitoring data,the types of deformation inducing factors of ancient landslides in large open pit mines in western Sichuan was analyzed,the response relationship between the deformation of ancient landslides and rainfall was obtained,a finite element calculation model was established,the seepage characteristics,deformation characteristics and stability change law of ancient landslides under heavy rainfall were calculated and analyzed,and the resurrection mechanism of such ancient landslides was revealed.The research results are of reference value for deepening the understanding of the ancient landslide of large open pit in western Sichuan,and are of great significance for completing the landslide control and disaster prevention under the action of rainfall.

关 键 词：强降雨 川西地区 露天矿坑 古滑坡 复活机制 

分 类 号：X43[环境科学与工程—灾害防治]