Apport des modèles géo-métallurgiques et de la catégorisation des ressources à la définition de la fosse ultime d'une mine à ciel ouvert : Application à la mine de cuivre de Mantos de la Luna au Chili

Abstract : The present research work concerns the general field of mining project set-up and is aimed at developing a new approach in long term mine planning. The main objective of this work is to incorporate the geo-metallurgical concept to mine planning which is traditionally based only on economic criteria.The need to maximize the recovery of one or more useful elements of a copper deposit, the optimization of reagents consumption in the metallurgical process, to know where to leave the materials which may be valorise in the future by a series of new operations, etc.. lead to fit mine planning and metallurgical geological features of the deposit. The geo-metallurgical units are determined by a combination of the main geological parameters, rock type, weathering, mineralization, etc... Each unit has a different behaviour in metallurgical process with specific values of recovery and acid consumption.The set-up of the geo-metallurgical mining model (GMM) and the resources categorization were made using geostatistical tools.Having a GMM model is a great help for the definition of the ultimate pit and long-term planning, as well as in a first approach of the response of the deposit to metallurgical process, but also to optimize costs and establish alternatives to maximize metal recovery.This work is based on the practical case of the Mantos de la Luna stratabound Cu and Ag deposit located in northern Chile. It proposes a methodology for resources classification of this type of deposit and includes a comparison between the traditional approach and the approach that integrates the concept of the GMM model.
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José Manuel Delgado Vega. Apport des modèles géo-métallurgiques et de la catégorisation des ressources à la définition de la fosse ultime d'une mine à ciel ouvert : Application à la mine de cuivre de Mantos de la Luna au Chili. Sciences de la Terre. Ecole Nationale Supérieure des Mines de Paris, 2012. Français. ⟨NNT : 2012ENMP0094⟩. ⟨pastel-00858806⟩

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