摘要
依据某离子型稀土矿原地浸矿施工实例,使用有限差分软件FLAC3D对其边坡稳定性进行了数值模拟渗流分析,得到了该稀土矿边坡在持续大量注入溶浸液后的孔压场、位移场、安全系数等数据.分析结果表明:注液5~20 d内孔压场以大于15 k Pa的速度增加,第20 d时孔压增大到93.82 k Pa,位移也迅速增大到-24.44 mm,安全系数由施工前的1.74迅速减小到1.31.开挖集液暗沟后,注液第20~30 d的孔压稳定在85.33~85.61 k Pa,累积最大位移为-25.26^-26.16 mm,安全系数稳定在1.27,总体来看,边坡能维持长期稳定.
The Flac3D software, frequently-used finite difference software was used for slope stability transfu- sion numerical modeling. This modeling operation was based on the practice of In-situ leaching mining in an ionic rare-earth mine. Lots of parameters were obtained after large injecting of leaching solution, such as hole temperature-pressure, displacement field, safety factor and so on. The results show that hole temperature-pres- sure increases with the speed over 15 Kpa after injected leaching solution 5-20 days, and reaches 93.82 kPa in the final day; the displacement is expanded to -24.44 mm in a fast speed. The safety factor quickly reduces to 1.31 from 1.74 before construction. After the excavation of intercepting drainage, hole temperature-pressure remains at 85.33-85.61 Kpa if leaehing solution injection lasting for another 10 days with accumulated maxi- mum displacement being -25.26 -- 26.16 mm. The safety coefficient of slope achieves a stable level of 1.27 and the slope can maintain long-term stability generally.
出处
《有色金属科学与工程》
CAS
2015年第4期111-115,共5页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(41462016)
关键词
原地浸出
离子型稀土矿
边坡稳定性
数值模拟
渗流
in-situ leaching mine
ionic rare earth mine
slope stability
numerical simulation
transfusion
