基于ABAQUS的露天矿边坡稳定性对剪胀角敏感度的研究  

Sensitivity studies of dilatancy angle for open-pit slope stability based on ABAQUS

作　　者：陈长峰[1] 王旭春[1,2] 张鹏[1] 徐志立[1] 鲁文超[1] 

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]山东省地质环境与效应工程技术研究中心,青岛266033

出　　处：《青岛理工大学学报》2015年第4期10-15,共6页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(50974078);国家住房和城乡建设部科技项目(2009-R2-16)

摘　　要：根据平朔东露天矿东北帮边坡历史滑坡的实际情况,运用ABAQUS有限元分析软件分析边坡的稳定性,并研究剪胀角对该边坡稳定性的敏感性.采用强度折减法进行分析,发现剪胀角由0°增加到5°,10°和φ/2(φ为每层的摩擦角)时,稳定系数在一定范围内逐渐增加;在前人研究的基础上考虑了每层剪胀角不同情况下的边坡稳定性,且经过对比分析在剪胀角为φ/2工况下求得的稳定系数最大;并由ABAQUS数值模拟分析可知,滑坡主要是在砂岩和破碎风化带的交界处产生,该区域需要进行加固.According to the actual situation of landslide in the northeast of the Pingshuo OpenPit Slope,the stability of slope is analyzed using ABAQUS element analysis software.Meanwhile,the sensitivity of dilatancy angle for the stability of slope is studied.The research shows that the factor of stability increases gradually in a certain range as dilatancy angle changes from 0°,5°,10°toφ/2（φis the friction angle of each layer）with the strength reduction method.On the basis of previous studies,this paper studies the stability of slope with different friction angle in each layer,the results show that the maximum safety factor of slope is under the half dilatancy angle.At the same time,the analysis by ABAQUS shows that landslide mainly occurs at the junction of the sandstone and the broken belt.Therefore the region needs to be reinforced.

关 键 词：露天矿 边坡 稳定性 数值分析 剪胀角 

分 类 号：TD824[矿业工程—煤矿开采]