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Physical and numerical modelling of a monolayer cover placed on reactive tailings

Geraldine Cosset, Michel Aubertin

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: W2-D

ABSTRACT: Unsaturated sulphidic tailings stored in a surface impoundment tend to oxidise and generate acid mine drainage (AMD). The formation of AMD can be limited by reducing the flux of oxygen penetrating the tailings with the implementation of an elevated water table and a monolayer cover. This paper presents the main results of a study on the response of such a simple cover placed on reactive tailings. Results from column tests and simulations indicate that the hydrogeological properties of the cover and position of the water table are the most important characteristics to control AMD.

RÉSUMÉ: Des résidus miniers sulfureux non saturés entreposés en surface tendent à s'oxyder pour former du drainage minier acide (DMA) La formation de DMA peut être limitée en réduisant le flux d'oxygène qui pénètre les résidus à l'aide d'une nappe surélevée et d'une couverture monocouche. Ce papier porte sur l'étude du comportement d'un tel recouvrement placé sur des résidus. Les résultats d'essais en colonne et de simulations montrent que les propriétés hydrogéologiques du recouvrement et la position de la nappe sont les caractéristiques les plus importantes pour contrôler le DMA. 1 INTRODUCTION

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Cite this article:
Geraldine Cosset; Michel Aubertin (2010) Physical and numerical modelling of a monolayer cover placed on reactive tailings in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_157, author = Geraldine Cosset; Michel Aubertin,
title = Physical and numerical modelling of a monolayer cover placed on reactive tailings,
year = 2010
}