鸡尾山高速远程滑坡—碎屑流动力学特征分析

Jiweishan rapid and long run-out landslide-debris flow dynamic characteristics analysis

以武隆鸡尾山滑坡为例,通过灾害形成地质环境条件的调查,概述了鸡尾山滑坡失稳诱发因素,包括:上硬下软的地层结构、岩溶发育、高陡地形地貌条件和采矿活动等;介绍了鸡尾山斜倾厚层滑坡视向滑动的基本模式,为"后部块体驱动-前缘关键块体瞬时失稳"。在此基础上,根据鸡尾山滑坡的运动和堆积特征,将滑坡分为滑源区和堆积区,通过二维DAN-W模拟,选取Frctional、Voellmy等流变模型,模拟了滑坡运动的整个过程,得到滑坡堆积体的体积、厚度和滑坡运动速度的变化规律,与实际情况基本一致。并且为西南山区高速远程滑坡成灾范围及滑动堆积特征的模拟分析提供了相应的依据。

Taking Wulong Jiweishan landslide as an example,to investigate the formation of geological environment by disaster,including an overview of Jiweishan landslide induced factors,hard soft stratum structure,karst development, high and steep terrain conditions and mining activities; introduces Jiweishan inclined thick landslide visual direction the basic pattern of sliding,'rear block drive key block in front of transient instability'. On this basis,according to the movement of Jiweishan landslide and landslide accumulation characteristics,will be divided into the source region and accumulation region,through the simulation of two-dimensional DAN-W,select Frctional,Voellmy rheological model,simulates the whole process of landslide movement,get variation of landslide volume,thickness and velocity of the landslide,and compared with the actual situation,basically the same as results. It offers the corresponding basis simulation analysis and accumulation characteristics of high-speed remote southwest mountain landslide and slide.