Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations

Catherine Domingue, Jean Michel Lemieux, Martin Grenon, John Molson, René Therrien, Pierre Luc Lajoie, Daniela Blessent

Resultado de la investigación: Contribución a una revistaArtículo

1 Cita (Scopus)

Resumen

Water inflows through fracture networks are a major economic and safety issue in underground mines. Although pre-grouting of pilot holes during mine development efficiently reduces water inflows into mine excavations, current design methods remain empirical. We used a finite-element numerical model to simulate groundwater inflow into a stope with the objective of finding the best configuration to increase pre-grouting efficiency for sealing faults while decreasing the associated costs. We designed simulations to test various grout injection scenarios for two different major fault locations around the stope, based on the site characteristics of the Éléonore mine (Québec, Canada). Sensitivity analyses show that, for a fault located above the stope, grouting the zone between the fault and the stope reduces inflow more than directly grouting the fault. Also, in the case of a fault intersecting a stope, the simulations suggest that the fault itself should be grouted as widely as possible, instead of sealing only the immediate surroundings of the stope.

Idioma originalInglés
Páginas (desde-hasta)497-506
Número de páginas10
PublicaciónMine Water and the Environment
Volumen38
N.º3
DOI
EstadoAceptada/en prensa - 1 ene 2019

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