EN FR
GeoConferences.ca

Experimental study of tailings percolation into waste rock

Nicolas Rey, Isabelle Demers, Bruno Bussière

In the proceedings of: GeoRegina 2014: 67th Canadian Geotechnical Conference

Session: Mining Geotechnics

ABSTRACT: To reduce the footprint of tailings storage sites, it is more and more common to recycle wastes by using them as construction materials for on-site facilities. In this study, it is proposed to use non contaminant-generating mine waste as part of covers with capillary barrier effects to control the generation of acid mine drainage. The goal is here to estimate, through column tests, the migration of fine particles of tailings within the underlying coarse rocks, and to evaluate the influence that this phenomenon induces on the saturated hydraulic conductivity of waste rocks. The results show that for the tested materials, the migration of fine particles occurs more significantly and deeply in the case of coarser waste rocks and that this effect tends to be amplified when the solid percentage of tailings decreases. However, the migration thus highlighted does not affect much the results of saturated hydraulic conductivity of waste rocks.

RÉSUMÉ: Pour réduire l™empreinte des sites d™entreposage de rejets miniers, on propose de plus en plus de valoriser ces rejets dans la construction d™infrastructures minières directement sur site. Dans la présente étude, on suggère d™utiliser des rejets miniers non-générateurs de contaminants dans des recouvrements de type couvertures à effet de barrière capillaire afin de contrôler la génération de drainage minier acide. Le but est ici d™estimer, par le biais d™expériences en colonne, la migration de particules fines de résidus à l™intérieur de stériles grossiers sous-jacents et d™évaluer l™influence que ce phénomène induit sur la conductivité hydraulique saturée des stériles. Les résultats montrent que pour les matériaux testés, la migration des particules fines s™effectue plus abondamment et plus en profondeur dans le cas de stériles plus grossiers et que cet effet s™avère amplifié lorsque le pourcentage solide des résidus diminue. La migration ainsi mise en évidence, n™affecte cependant que peu les résultats de conductivité hydraulique saturée des stériles.

Please include this code when submitting a data update: GEO2014_218

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article:
Nicolas Rey; Isabelle Demers; Bruno Bussière (2014) Experimental study of tailings percolation into waste rock in GEO2014. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoRegina14Paper218, author = Nicolas Rey; Isabelle Demers; Bruno Bussière,
title = Experimental study of tailings percolation into waste rock,
year = 2014
}