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.

IdiomaInglés
PublicaciónMine Water and the Environment
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

Palabras clave

    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.
    @article{0904a1f4d26b45159758b0d1729d6692,
    title = "Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations",
    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.",
    keywords = "Fracture sealing, Groundwater, Mine seepage, Numerical modelling, Pilot holes",
    author = "Catherine Domingue and Lemieux, {Jean Michel} and Martin Grenon and John Molson and Ren{\'e} Therrien and Lajoie, {Pierre Luc} and Daniela Blessent",
    year = "2019",
    month = "1",
    day = "1",
    doi = "10.1007/s10230-019-00589-2",
    language = "Ingl{\'e}s",
    journal = "Mine Water and the Environment",
    issn = "1025-9112",

    }

    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, 01.01.2019.

    Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

    TY - JOUR

    T1 - Numerical Evaluation of Grouting Scenarios for Reducing Water Inflows from Major Faults in Underground Excavations

    AU - Domingue, Catherine

    AU - Lemieux, Jean Michel

    AU - Grenon, Martin

    AU - Molson, John

    AU - Therrien, René

    AU - Lajoie, Pierre Luc

    AU - Blessent, Daniela

    PY - 2019/1/1

    Y1 - 2019/1/1

    N2 - 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.

    AB - 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.

    KW - Fracture sealing

    KW - Groundwater

    KW - Mine seepage

    KW - Numerical modelling

    KW - Pilot holes

    UR - http://www.scopus.com/inward/record.url?scp=85060354385&partnerID=8YFLogxK

    U2 - 10.1007/s10230-019-00589-2

    DO - 10.1007/s10230-019-00589-2

    M3 - Artículo

    JO - Mine Water and the Environment

    T2 - Mine Water and the Environment

    JF - Mine Water and the Environment

    SN - 1025-9112

    ER -