Flow analysis and dynamic slope stability in a copper ore heap leach
P.G.M Pacheco, M. Purizaga, J. Huertas, C. Romanel
In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical EngineeringSession: Mining and Rock Mechanics
ABSTRACT: This paper presents a numerical analysis for the unsaturated flow throughout a copper ore heap leach as well as static and dynamic slope stability analyses since the structure is planned to be built in a highly seismic region in the South of Peru. The heap will be constructed with non-treated copper ore (run of mine) on an impermeable pad specially devised to avoid the possibility of ground contamination by the flow of the acid solution. The numerical results obtained in the stability analyses indicate that the heap leach presents satisfactory safety factors even when considering earthquakes of magnitude 7.5 with maximum acceleration of 0.30g. It has been also observed that the phreatic line formed by the lixiviation solution does not reach the layers devised to protect the drainage pipes of the lixiviation system.
RÉSUMÉ: Cet article présente une analyse numérique de l'écoulement non saturé à travers une pile de mineraux de cuivre soumise a un procédé de lixiviation. Cette structure sera construite dans un région de forte activité sismique au sud du Perou et, en consequence, evaluations de la stabilité des pentes, sous chargements statique et dynamique, doivet être effectués. La pile de mineraux de cuivre non traités sera située sur une base impermeable spécialement conçue pour éviter la possibilité de contamination du sol de fondation par la solution acide. Les résultats numériques obtenus dans les analyses de stabilité indiquent que la pile présente des facteurs de sécurité satisfaisants même lorsque on considére séismes de magnitude 7.5 avec laccélération maximale de 0.30g. Il a été aussi remarqué que la ligne phreatic formée par la solution de lixiviation n'atteint pas les couches conçues pour protéger le système de drainage du procédé de lixiviation.
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P.G.M Pacheco; M. Purizaga; J. Huertas; C. Romanel
(2011) Flow analysis and dynamic slope stability in a copper ore heap leach in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GEO11Paper738,
author = P.G.M Pacheco; M. Purizaga; J. Huertas; C. Romanel
,
title = Flow analysis and dynamic slope stability in a copper ore heap leach,
year = 2011
}
title = Flow analysis and dynamic slope stability in a copper ore heap leach,
year = 2011
}