Presented in French
The geotechnical stability of tailings storage facilities (TSFs) has obtained considerable attention in recent years, as these facilities have been documented to fail due to flow liquefaction. Stacking of filtered tailings is currently being proposed as an alternate solution for tailings storage facilities; nevertheless, there are several challenges in identifying and analyzing these structures, especially in sites with high disposal rates. Piezocone (CPTu) testing is generally recognized as an effective tool for determining the in-situ engineering properties of tailings for use in stability and liquefaction assessments. To correlate the results of piezocone testing to liquefaction potential, several empirical approaches have been proposed. In this presentation, a detailed geotechnical characterization of the tailings at the Éléonore Mine filtered tailings storage facility, located in northwest Quebec, is presented to evaluate the tailings liquefaction susceptibility under static loading condition. The analysis includes soil behaviour classification using CPTu test results, as well as static liquefaction and post-liquefaction stability analysis. The liquefaction susceptibility analysis is based on characteristics such as the Soil Behaviour Type (SBT), the State Parameter (Ψ) and normalized corrected tip resistance (qc1), which were calculated using a set of published empirical calibrations. The stability analyses were carried out by assigning the peak and residual undrained shear strength to the contractive layers defined by the three different classification methods.
Ali Reza Zafarani Ali Reza Zafarani has many years of combined experience in engineering (industry) and research (academia). He has participated in projects focusing on geotechnics, hydrogeology and the mining environment. He has developed expertise in the safe deposition of mine tailings in mine storage facilities, taking into account environmental and hydro-geotechnical aspects; this includes static and seismic stability assessment of tailings dams, tailings impoundments deformation monitoring and modeling, mitigation techniques and site improvement. He holds a master's degree and a PhD in mineral engineering (mining geotechnics orientation) and has also participated in several research projects.
Free for members and non-members. This event will take place in person in Montreal, but you can also attend virtually - The address and virtual link will be provided on the registration confirmation.
Le Rendez-Vous du Comité Francophone de l'ACB is a periodic event (virtual and/or face-to-face) during which members of the committee receive a variety of presenters and guests to address and discuss various topics related to dams.
More informal and interactive than traditional webinars, this activity sometimes takes the form of a presentation, sometimes a discussion, and sometimes both.
