| 强降雨条件下离子型稀土矿山边坡稳定性分析 |
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| 引用本文： | 巫辅宇,饶运章,石亮,张美道,谭述君,张世佳.强降雨条件下离子型稀土矿山边坡稳定性分析[J].有色金属科学与工程,2022,13(5):148-154. |
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| 作者姓名： | 巫辅宇 饶运章 石亮 张美道 谭述君 张世佳 |
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| 作者单位： | a.江西理工大学，土木与测绘工程学院，江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金资助项目51964014江西省教育厅科学技术资助项目GJJ209414 |
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| 摘 要： | 降雨是诱发离子型稀土矿山滑坡灾害的主要因素之一。以赣南某离子型稀土矿山边坡为研究对象，采用数值模拟方法得到强降雨下边坡孔隙水压力的变化情况，分别分析降雨类型、停雨间隔时间和降雨强度对边坡孔隙水压力的影响，并应用有限元强度折减法计算拟定工况下的边坡稳定性系数。结果表明:①不同降雨类型下边坡孔隙水压力变化情况不同，增强型降雨对边坡稳定性系数影响最大。②边坡表面孔隙水压力回落幅度随停雨间隔时间的增加而增大。总降雨量相同时，停雨间隔时间缩短对边坡稳定性不利。③随着降雨强度的增大，边坡孔隙水压力的变化速率增大，边坡稳定性系数下降速率增大并且下降幅度增大。
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| 关 键 词： | 降雨入渗 离子型稀土 数值模拟 边坡稳定性 |
| 收稿时间： | 2022-01-16 |
Analysis on stability of ionic rare earth slope under heavy rainfall |
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| Affiliation: | a.School of Civil and Surveying & Mapping Engineering, Ganzhou 341000, Jiangxi, Chinab.School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China |
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| Abstract: | Rainfall is one of the main factors inducing the landslide disasters in ionic rare earth mines. In this paper, with the slope of an ionic rare earth mine in southern Jiangxi as the research object, the changes in pore water pressure of the slope under heavy rainfall were obtained by a numerical simulation method. The influence of rainfall typ, the interval time between rain stops and rainfall intensity on the slope pore water pressure were analyzed respectively, and the coefficient of the slope stability was calculated by applying finite element strength subtraction under the proposed working conditions. The results show that pore water pressures of the slope vary under different rainfall types, and the enhanced rainfall has the greatest influence on the slope stability coefficient. The drop amplitude of the pore water pressure on the slope surface increases with the increase of rain stop interval. When the total rainfall is the same, the shortened rain stop interval is detrimental to slope stability. With the increase of rainfall intensity, the change rate of slope pore water pressure increases, the decline rate of slope stability coefficient increases, and the decline range increases. |
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