低丘缓坡地区小型崩塌的DDA方法模拟  

SIMULATION OF SMALL COLLAPSE IN LOW-SLOPE HILLY LAND BY DDA METHOD

作　　者：罗明[1] 廖维[1] 郭双[2] 甯尤军[2] 

机构地区：[1]四川省地质调查院,成都610081 [2]西南科技大学制造科学与工程学院,绵阳621010

出　　处：《地质灾害与环境保护》2016年第2期84-88,共5页Journal of Geological Hazards and Environment Preservation

基　　金：四川省地质调查院"成都城市群环境地质调查评价"项目(编号12120113004200)

摘　　要：小型崩塌是低丘缓坡地区,特别是低丘缓坡开发利用中常见的一类地质灾害。本论文采用DDA方法对小型崩塌问题进行数值模拟和分析。模拟中通过增加重力的方法使得坡体逐渐破坏失稳;针对不同的岩土体类型进行不同的单元(块体)划分,并根据需要考虑岩土体的开裂形式破坏。研究对某真实坡体的小型崩塌过程进行了模拟预测和分析。研究表明DDA方法是模拟小型崩塌破坏的有效方法,可以在该类问题的分析中得到广泛应用。Small-scale collapse failure is a typical kind of geological disaster in low-slope hilly land,especially in its exploitation.In this paper,the DDA method is adopted to numerically simulate and analyze the process of small-scale collapse.In the simulation,different types of elements（or blocks）are employed according to different geological material types with the consideration of fracturing failure when required,and the slope is driven to collapse gradually by increasing its gravity.The collapse failure process of a practical small slope is predicted by DDA simulation and the failure characteristics are discussed.Results indicate that the DDA is an effective method for the numerical simulation of small-scale collapse failures,which could be widely used in the analysis of this kind of problems.

关 键 词：崩塌 低丘缓坡 数值模拟 DDA方法 

分 类 号：P642.21[天文地球—工程地质学] TU457[天文地球—地质矿产勘探]