Laboratory measurement and prediction of the saturated hydraulic conductivity of mine waste rock
Anna Peregoedova, Michel Aubertin, Bruno Bussière
In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNCSession: Mining Geotechnics I
ABSTRACT: The hydraulic conductivity (ksat) of waste rock samples from an open pit mine was determined by means of permeability tests conducted at an intermediate scale in instrumented columns; these tests are described here. The values of ksat obtained experimentally (~10-1 cm/s for all of the fractions tested) were usually one to two orders of magnitude higher than those obtained from the predictive Kozeny-Carman and Kozeny-Carman modified equations. The results from these tests suggest that under water-saturated conditions, the hydraulic conductivity of waste rock can be controlled by the presence of macropores. Alternative predictive equations are proposed here to better represent the measured ksat values.
RÉSUMÉ: La conductivité hydraulique saturée ksat de roches stériles, prélevées sur une halde d™une mine à ciel ouvert, a été déterminée à l™aide d™essais de perméabilité réalisés à une échelle intermédiaire dans des colonnes instrumentées; ces essais sont décrits ici. Les valeurs de ksat mesurées (~10-1 cm/s pour toutes les fractions de la roche stérile testées) sont au moins un ordre de grandeur plus élevées que celles calculées en utilisant les équations prédictives de Kozeny-Carman et de Kozeny-Carman modifié. Ces divergences pourraient être expliquées par la présence de macropores qui contrôlent la conductivité hydraulique saturée des stériles. Des équations alternatives sont proposées pour mieux prédire la valeur de ksat des stériles obtenue des essais de laboratoire.
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Anna Peregoedova; Michel Aubertin; Bruno Bussière (2013) Laboratory measurement and prediction of the saturated hydraulic conductivity of mine waste rock in GEO2013. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GeoMon2013Paper163,
author = Anna Peregoedova; Michel Aubertin; Bruno Bussière,
title = Laboratory measurement and prediction of the saturated hydraulic conductivity of mine waste rock,
year = 2013
}
title = Laboratory measurement and prediction of the saturated hydraulic conductivity of mine waste rock,
year = 2013
}