Effect of suction and preparation method on the compressibility of Stava silty tailings
Effect of suction and preparation method on the compressibility of Stava silty tailings
Tailing storage facilities are complex geotechnical structures to safely store the waste products resulting from mining processes. Proper knowledge of the hydro-mechanical behaviour of tailing wastes under unsaturated conditions allows for assessing reliable stability analysis of tailing dams. This research provides the preliminary results of an experimental campaign carried out on silty tailings to analyze their pre-shearing state of stress. The experiment was performed on statically compacted and remoulded samples through oedometric tests under saturated and unsaturated conditions. The dependency of the 1d-Normal Compression Line (1d-NCL) on suction and sample preparation technique is investigated, with the suction level evaluated based on the water retention tests performed on the same soil. The compressibility and the occurrence of a transitional behaviour depending on the suction level and preparation method were finally analyzed based on the Basic Barcelona Model.
G. Bella; D. Czerski; S. Ghezzi; M. Giani; M. Luescher; C. Ambrosi
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
C - Risk analysis and safety evaluation
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