摘要
当传递到岩体上的应力发生改变时,岩体的结构、形状等方面就会发生连续性变化。当这种连续性变化积累到一定程度,则产生破坏。岩体的变形破坏方式和过程与其承受的应力状态及其变化有关。为了分析坡体内部应力变化规律,预测滑坡前缘的变形发展趋势,采用按不同深度分层、双向传感器联合应用的方法,在西露天矿南帮滑坡前缘鼓胀区安装土压力计进行应力监测。监测结果表明,采矿活动、降水和矿震是影响坡体应力状态的主导因素,也是影响滑坡变形发展的主导因素。同时,采用基于ANSYS软件的有限元强度折减法对地表变形较强烈的E1200剖面进行数值模拟。结果表明应力沿着地层在坡脚软弱岩层处集中释放,与应力监测结果吻合。
When the stress in the rock changes,the structure and the shape of the rock will also change continuously. When the continuous changes accumulate to a certain extent,the destruction will happen. The mode and process of the rock failure is related with the state and change of the stress. In order to analyze the regularity of the stress change in the landslide body,forecast the change trend in the front region of the landslide,the earth pressure meter was installed in the front region of the landslide body by the method that bilateral transducers were installed at different depth. The monitoring results indicated that mining,precipitation and mine earthquake were the main influence factors on the state of the stress and the landslide development. At the same time,the finite element strength reduction method using ANSYS software was applied to numerical modeling on the E1200 profile where intense deformation occurred. The numerical simulation results show that the stress released intensively in the weak-rock at the slope-toe and was in consistent with the stress monitoring result.
作者
滕超
王雷
刘宝华
崔原
贺鑫
唐浩
TENG Chao;WANG Lei;LIU Baohua;CUI Yuan;HE Xin;TANG Hao(The Tenth Exploration Geology Institute and Mineral Resources of Liaoning Province, Fushun, Liaoning 113004, China)
出处
《中国地质灾害与防治学报》
CSCD
2018年第2期35-42,共8页
The Chinese Journal of Geological Hazard and Control
关键词
应力监测
土压力计
应力状态
影响因素
数值模拟
stress monitoring
earth pressure meter
stress state
influencing factor
numerical modeling
