模拟降雨-浸矿条件下离子型稀土矿滑坡试验研究  

Experimental Study on Landslide Simulation of Ion-Type Rare Earth Mine Under Rainfall-Leaching Condition

作　　者：郭钟群[1] 刘琪琪 刘凌峰 汪浩轩 刘颜硕 王晓军 GUO Zhongqun;LIU Qiqi;LIU Lingfeng;WANG Haoxuan;LIU Yanshuo;WANG Xiaojun(School of Civil Engineering and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Key Laboratory of Safe and Efficient Mining of Rare Metal Resources of Jiangxi Province,Ganzhou 341000,China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]稀有金属资源安全高效开采江西省重点实验室,江西赣州341000

出　　处：《有色金属(中英文)》2025年第1期129-139,共11页Nonferrous Metals

基　　金：国家自然科学基金资助项目(52364012,52004106);江西省自然科学基金项目(20224BAB214035)。

摘　　要：离子型稀土矿边坡稳定性是制约矿山安全开采的关键问题。基于自制模拟试验装置,开展了不同降雨-浸矿条件下离子型稀土滑坡模拟试验,刻画了坡体形态破坏和坡面形貌破坏特征,揭示了土体含水率和孔隙水压力的变化规律,运用COMSOL多场耦合软件进行了边坡稳定性数值模拟分析。通过模型试验发现,边坡破坏模式主要为浅层滑塌和冲蚀滑移形成的综合破坏;降雨入渗过程中,坡面和坡脚处的土体含水率都是先增大后趋于稳定,饱和含水率41%~44%;坡面处的孔隙水压力先上升后趋于稳定,坡体内部孔隙水压力则由稳定到突增再趋于稳定。通过数值模拟得到,当降雨强度增大时,降雨量的变化对边坡的安全系数影响较大,下降4.26%;对黏聚力和内摩擦角的影响很小,下降约2.7%。The slope stability of ionic rare earth mine is a key issue restricting the safe mining of mines.Based on the self-made simulation test device,the simulation tests of ionic rare earth landslides under different rainfall-leaching conditions were carried out.The characteristics of the slope wetting front and the failure characteristics of the slope topography were depicted,and the variation law of soil moisture content and pore water pressure was revealed.The slope stability was numerically simulated by COMSOL.Through the model test,it was found that the failure mode of the slope was mainly the comprehensive failure caused by shallow collapse and erosion slip.The soil moisture content at the slope surface and the foot of the slope increased first and then tended to stabilize during the rainfall infiltration,and the saturated water content is between 41%and 44%.The pore water pressure at the slope rose first and then tended to be stable,while the pore water pressure inside the slope increased from stable to sudden increase and then tends to be stable.Through the numerical simulation analysis,it is found that with the increase of rainfall intensity,the change of rainfall has a slightly greater impact on the safety factor of slope,which decreases by 4.26%.The effect on cohesion and internal friction angle is small,decreasing by about 2.7%.

关 键 词：离子型稀土 降雨入渗 原地浸矿 数值模拟 

分 类 号：TD865[矿业工程—金属矿开采]