干湿循环对含蚀变带边坡稳定性影响研究  

Stability Analysis for Slope with Alteration Zone Subjected to Dry-Wet Cycles

作　　者：陈绪新[1] 付厚利 秦哲[3] 朱合轩 

机构地区：[1]山东科技大学山东省防灾减灾重点实验室土木工程与建筑学院,山东青岛266590 [2]临沂大学土木工程与建筑学院,山东临沂276000 [3]山东科技大学矿山灾害预防控制重点实验室-省部共建国家重点实验室培育基地矿业与安全工程学院,山东青岛266590

出　　处：《矿冶工程》2017年第4期32-35,共4页Mining and Metallurgical Engineering

摘　　要：进行了不同干湿循环条件下尾矿库蚀变带岩石常规三轴试验,计算得到了抗剪强度参数,分析了其弱化程度;采用精度较高的Morgenstern-Price法,并引入抗剪强度参数的损伤变量,建立含损伤变量的安全系数隐式表达式,通过不平衡推力法求得岩体条块间的法向作用力,多次迭代求得不同干湿循环条件下边坡稳定安全系数,经历20次干湿循环后,边坡稳定安全系数显著降低,存在发生滑坡的潜在威胁。A tri-axial test was conducted for rocks in alteration zone within tailings pond slop after different dry-wet cycles,shear strength parameters were obtained based on calculation and weakening degree of rock was analyzed.An implicit expression for safety factor was established by adopting Morgenstern-Price method and introduction of damage variables of shear strength parameters.The normal force acting on the rock block was calculated with the unbalanced-thrust force.Then,the safety factors of slope stability after different dry-wet cycles were obtained through several iterations.It is shown that after 20 dry-wet cycles,slope stability significantly reduced,indicating there is a potential threat from landslide hazard.

关 键 词：尾矿库 边坡 干湿循环 蚀变带 抗剪强度 Morgenstern-Price法 

分 类 号：TU458[建筑科学—岩土工程]