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Characterization of Mine Waste Materials after 50 Years of Climate Interaction

机译：气候相互作用50年后的矿山废料表征

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摘要

This paper presents the results from of a set of in situ and laboratory tests performed in order to characterize the tailings of an abandoned tailings dam of the Castano Viejo mine, which is located at the eastern foothills of the central Andes mountain range, an arid and seismically active area. The tailings dam has been abandoned since 1964, and no reclamation or closure works of any nature have been performed up to date. The in situ research program comprised the excavation of several bore holes, in order to investigate the internal structure of the impoundment and to collect bulk samples for the later laboratory characterization. Standard penetrations tests (SPT) were also performed at the boring sites. Several test pits were excavated, where logging of the texture and recollection of intact samples were carried out. The in situ testing program also included bulk density determinations and permeability tests at different depths. Laboratory characterization program comprised the determination of the grain size distribution curves, plasticity index, soil water characteristic curve (SWCC) among other. Regarding mechanical testing, consolidated-undrained with pore pressure measurement (CU) triaxial, direct shear, and Oedometer tests were performed.
机译：本文介绍了一系列现场和实验室测试的结果，以表征Castano Viejo矿的废弃尾矿坝的尾矿，该矿位于安第斯山脉中部东部山麓，干旱和干旱。地震活动区。尾矿坝自1964年以来就已被废弃，迄今为止，尚未进行过任何性质的填海或封闭工程。现场研究计划包括开挖多个钻孔，以便研究蓄水池的内部结构并收集大量样品，以用于以后的实验室表征。在钻探现场也进行了标准穿透力测试（SPT）。挖掘了几个测试坑，进行了纹理记录和完整样品的回收。原位测试程序还包括在不同深度进行的堆积密度测定和渗透性测试。实验室表征程序包括确定粒度分布曲线，可塑性指数，土壤水分特征曲线（SWCC）等。关于机械测试，进行了三轴孔压测量（CU）固结排水，直接剪切试验和里程表测试。

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