不同降雨强度下离子型稀土矿边坡渗流特性与临界滑移面变化分析
Analysis on Seepage Characteristics and Varied Critical Slip Surface of Ionic Rare Earth Mine Slope Under Different Rainfall Intensities
饶国柱 1饶运章 2高中泉 2韩民 2张晓明 3杨志华 2向润 2章来烨3
作者信息
- 1. 江西理工大学 应急管理与安全工程学院,江西 赣州 341000
- 2. 江西理工大学 资源与环境工程学院,江西 赣州 341000
- 3. 江西理工大学 土木与测绘工程学院,江西 赣州 341000
- 折叠
摘要
以离子型稀土矿边坡为研究对象,研究了不同降雨强度条件下降雨、停雨阶段离子型稀土矿边坡孔隙水压力变化情况,并利用有限元Morgenstern-Price法研究了各时间段临界滑移面的变化.结果表明,降雨强度是影响离子型稀土矿浅层边坡孔隙水压力的显著因素;雨水在离子型稀土矿边坡中的传递具有滞后性,是停雨阶段造成离子型稀土矿边坡不稳定隐患的内在原因;降雨强度越大,进入 289 滑移面的时间越快,安全系数变化的"加速度"波峰越高,影响时间越长.首次提出降雨条件下离子型稀土矿边坡发展可能历经的 4 个阶段为:较为安全阶段、内部剧烈变化阶段、极易滑坡阶段及相对安全阶段.
Abstract
A slope of ionic rare earth mine was taken to study the variation of pore water pressure in the slope during and after rainfall events with different rainfall intensity,and the varied critical slip surface during these two periods of time was also studied by using the finite element Morge nstern-Price method.The results show that the rainfall intensity is a significant factor affecting the pore water pressure of shallow slope of ionic rare earth mine.The hysteresis property of rainwater infiltration into the slope is the internal reason for hidden risk of potential slope instability after rainfall events.The greater rainfall intensity will lead to faster formation of the 289 slip surface,higher peak value of greatly changed safety factor,as well as longer influence time.It is proposed for the first time that the development of ionic rare earth mine slope under rainfall conditions may experience four stages:safety,drastic internal variation,high landslide susceptibility,and relative safety.
关键词
离子型稀土矿/边坡稳定性/孔隙水压力/数值模拟/滑移面/降雨/渗流特征Key words
ionic rare earth mine/slope stability/pore water pressure/numerical simulation/slip surface/rainfall/seepage characteristics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据