Effect of the lenticles on moisture migration in capillary zone of tailings dam

作     者：Di Liu Min-jie Lian Cai-wu Lu Wen Zhang Di Liu;Min-jie Lian;Cai-wu Lu;Wen Zhang

作者机构：College of Materials Science and EngineeringXi’an University of Architecture and TechnologyXi’an 710055China Institute of Mining System EngineeringXi’an University of Architecture and TechnologyXi’an 710055China Sinosteel Mining Co.Ltd.Beijing 100080China School of Resource EngineeringXi’an University of Architecture and TechnologyXi’an 710055China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2020年第27卷第8期

页      面：1036-1045页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081902[工学-矿物加工工程] 0806[工学-冶金工程] 08[工学] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51774228 and51904220) 

主　　题：tailings lenticle moisture migration capillary retarding effect microcosmic mechanism 

摘      要：Small-particle interlayers(lenticles)show some characteristic hydraulic properties and can affect the movement of unsaturated *** 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 *** 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 *** motion of the capillary water in the lenticle is mainly transversal,with the upward curve beingflat,and the longer isflat,the longer is the time needed for the water to *** interlayer can form a capillary stagnation zone with moisture content close to *** high interlayer may form a discontinuous corrugated capillary ***,when the wetting front reaches thecoarse-grain(lower)-fine-grain(upper)interface,theanti-capillary barrier effectresults in more moisture in the upper ***,when the wetting front of the capillary water reaches thefine-grain(upper)-coarse-grain(lower)interface,thecapillary barrier effectcauses the moisture content of the upper tailings to decreases sharply because of the horizontal movement of the water in the fine *** is clear that the presence of lenticles can retard the rise of capillary water by storing water.