Coupled Thermo-Hydro-Chemical Coupling in Cemented Tailings Backfill: Modelling of Temperature Development

Mamadou Fall, Di Wu

In the proceedings of: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: M2B - Mine Tailings

ABSTRACT: In this paper, a thermo-hydro-chemical (THC) model is developed and implemented into COMSOL software for predicting the temperature development and distribution within hydrating cemented paste backfill (CPB) structure that contain mineral admixtures, heat transfert between CPB structures and mine rock. The developped model is validated against results from laboratory and field studies of CPB. The validation tests show good agreement between the predicted and experimental laboratory and field results. The developed tool is then used to simulate the thermal performance of CPB structure in several practical cases of mine backfill operations. From the simulation results valuable information was gained regarding the heat development within CPB structures, the effect of several design factors such as filling rate and stope geometry, filling strategy on heat development within CPB structures and the thermal interactions between the CPB and the surroudning environment, the effect of mix design on the performance (thermal) of CPB structures.

RÉSUMÉ: Dans cet article, un modèle thermo-hydro-chimique (THC) est développé et intégré dans le logiciel COMSOL pour prédire le développement et la distribution de la température dans un ouvrage de remblais miniers cimentés en pâte (RMCP) qui contient des ajouts de RMCP une bonne corrélation entre les valeurs prédites et celles mesurées au laboratoire et RMCP dans . Dinformations concernent le developpement de la facteurs de design, tels que la vitesse de remblayage, la géométrie de la cavité à remblayer, la stratégie de remblayage la composition des mélanges sur la performance (thermique) des ouvrages de remblai

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