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http://dx.doi.org/10.7843/kgs.2014.30.3.47

Estimation on Unsaturated Characteristic Curves of Tailings obtained from Waste Dump of Imgi Mine in Busan  

Song, Young-Suk (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Kim, Kyeong-Su (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Jeong, Sueng-Won (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Choon-Oh (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean Geotechnical Society / v.30, no.3, 2014 , pp. 47-58 More about this Journal
Abstract
To investigate the unsaturated characteristics of the tailings obtained from the waste dump at Imgi mine, matric suction and volumetric water content were measured in both drying and wetting processes using Automated Soil-Water Characteristics Curve Apparatus. Based on the measured result, Soil Water Characteristic Curves (SWCC) were estimated by van Genuchten model. According to the unsaturated soil classification method, the tailings of the waste dump correspond to clayey sand. As a result of Suction Stress Characteristic Curve (SSCC) by Lu and Likos model, SSCC has a shape of S which is similar to SWCC. The hysteresis phenomenon occurred in SSCCs, which means the suction stress of drying path is larger than that of wetting path in the same effective degree of saturation. The effective stress of unsaturated soil is equal to that of saturated soil when matric suction is less than Air Entry Value (AEV). However, the effective stress of unsaturated soil is larger than that of saturated soil when matic suction is more than AEV. Meanwhile, unsaturated hydraulic conductivity by van Genuchten model decreased with increasing matric suction, and the hydraulic conductivity of drying path is larger than that of wetting path.
Keywords
Waste dump; Tailings; Soil-Water Characteristic Curve (SWCC); Suction Stress Characteristic Curve (SSCC); Hydraulic Conductivity Function (HCF);
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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