当前位置: X-MOL 学术Int. J. Miner. Metall. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of the lenticles on moisture migration in capillary zone of tailings dam
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-020-1963-x
Di Liu , Min-jie Lian , Cai-wu Lu , Wen Zhang

Small-particle interlayers (lenticles) show some characteristic hydraulic properties and can affect the movement of unsaturated water. In this study, we developed a novel online capillary-water-absorption monitoring device and conducted three groups of comparison tests to simulate lenticle positions and thicknesses with respect to the capillary rise. The results show that the characteristic wetting front exhibits a fast rise in the early stage, a slow rise in the middle stage, and stability in the later stage. The motion of the capillary water in the lenticle is mainly transversal, with the upward curve being “flat,” and the longer is “flat,” the longer is the time needed for the water to move. The interlayer can form a capillary stagnation zone with moisture content close to saturation. The high interlayer may form a discontinuous corrugated capillary zone. Thus, when the wetting front reaches the “coarse-grain (lower)-fine-grain (upper)” interface, the “anti-capillary barrier effect” results in more moisture in the upper layer. Thus, when the wetting front of the capillary water reaches the “fine-grain (upper)-coarse-grain (lower)” interface, the “capillary barrier effect” causes the moisture content of the upper tailings to decreases sharply because of the horizontal movement of the water in the fine medium. It is clear that the presence of lenticles can retard the rise of capillary water by storing water.



中文翻译:

扁豆对尾矿坝毛细区水分迁移的影响

小颗粒夹层(透镜体)显示出某些水力特性,并且会影响不饱和水的运动。在这项研究中,我们开发了一种新型的在线毛细管吸水监测装置,并进行了三组比较测试,以模拟相对于毛细管上升的双凸透镜位置和厚度。结果表明,特征性润湿锋在早期呈现出快速上升,在中部呈现缓慢上升,并在后期呈现出稳定性。毛细水在双凸透镜中的运动主要是横向的,向上的曲线是“平坦的”,而“平坦的”时间越长,水运动所需的时间就越长。中间层可以形成含水量接近饱和的毛细管停滞区。高夹层可以形成不连续的波纹状毛细管区。因此,当润湿前沿达到“粗粒(下部)-细粒(上部)”界面时,“抗毛细屏障效应”将导致上层中的水分增加。因此,当毛细管水的湿润前沿到达“细粒(上部)-粗粒(下部)”界面时,“毛细屏障效应”会导致上部尾矿的水分含量由于水平方向而急剧下降。水在精细介质中的运动。显然,双凸透镜的存在可以通过储存水来阻止毛细管水的上升。当毛细管水的湿润前沿到达“细粒(上部)-粗粒(下部)”界面时,“毛细屏障效应”会导致上部尾矿的水分含量急剧下降,因为细介质中的水。显然,双凸透镜的存在可以通过储存水来阻止毛细管水的上升。当毛细管水的湿润前沿到达“细粒(上部)-粗粒(下部)”界面时,“毛细屏障效应”会导致上部尾矿的水分含量急剧下降,因为细介质中的水。显然,双凸透镜的存在可以通过储存水来阻止毛细管水的上升。

更新日期:2020-08-15
down
wechat
bug