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 revistaArtículoInvestigaciónrevisión exhaustiva

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

Huella dactilar

Grouting
grouting
Excavation
excavation
inflow
Water
water
Electric fault location
sealing
Numerical models
Groundwater
grout
fracture network
Economics
design method
evaluation
simulation
Costs
safety
groundwater

Citar esto

Domingue, Catherine ; Lemieux, Jean Michel ; Grenon, Martin ; Molson, John ; Therrien, René ; Lajoie, Pierre Luc ; Blessent, Daniela. / Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations. En: Mine Water and the Environment. 2019 ; Vol. 38, N.º 3. pp. 497-506.
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abstract = "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 {\'E}l{\'e}onore mine (Qu{\'e}bec, 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.",
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Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations. / Domingue, Catherine; Lemieux, Jean Michel; Grenon, Martin; Molson, John; Therrien, René; Lajoie, Pierre Luc; Blessent, Daniela.

En: Mine Water and the Environment, Vol. 38, N.º 3, 01.01.2019, p. 497-506.

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

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AU - Lemieux, Jean Michel

AU - Grenon, Martin

AU - Molson, John

AU - Therrien, René

AU - Lajoie, Pierre Luc

AU - Blessent, Daniela

PY - 2019/1/1

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KW - Groundwater

KW - Mine seepage

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