含缓倾软弱夹层的矿山高边坡长期稳定性分析  

Long-term Stability of Open-pit High Slopes with Gently-inclined Soft Interlayers

作　　者：姚远[1] 简文星[1] 李立辰 王璐[1] 马冲[1] YAO Yuan;JIAN Wen-xing;LI Li-chen;WANG Lu;MA Chong(Faculty of Engineering,China University of Geosciences,Wuhan 430074,Chin)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《长江科学院院报》2018年第8期112-116,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41672317)

摘　　要：选取常规力学试验参数与反演环剪流变试验得到的流变参数,采用基于Burgers流变模型的数值计算方法对四川省峨胜水泥采矿场含缓倾软弱夹层的变形体边坡进行长期稳定性分析。结果表明:可用Burgers模型来描述二叠系含泥软弱夹层的流变变形特性;Burgers流变模型的数值计算结果显示该边坡已出现破坏,且监测点的位移曲线与实际监测点曲线拟合度较高,表明软弱夹层的流变特性在边坡破坏机制中起主导作用。对比传统的极限平衡法与强度折减法,含此类缓倾软弱夹层边坡的长期稳定性分析宜采用基于Burgers流变模型的数值计算方法。The stability of a high slope containing gently-inclined soft interlayers in Esheng open-pit limestone mine was analyzed by using Burgers rheological model based on conventional mechanical test parameters and rheological parameters obtained by inversion of cyclic shear rheological test. Results demonstrate that Burgers rheological model is able to describe the rheological property of the argillaceous soft interlayers in Permian formation. Simulation results based on the Burgers rheological model revealed the failure of high slope and a high fitting degree between simulated displacement and field-monitored displacement,indicating that the rheological property of soft interlayers plays a dominant role in the failure of high slopes. In conclusion,compared with traditional limit equilibrium method and strength reduction method,Burgers rheological model is more appropriate in researching the long-term stability of high slopes containing gently-inclined soft interlayers.

关 键 词：矿山高边坡 长期稳定性分析 缓倾软弱夹层 Burgers流变模型 数值模拟 

分 类 号：TU457[建筑科学—岩土工程]