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Geomechanical characterization of a heterogenous rock mass using geological and laboratory test results: a case study of the Niobec Mine, Quebec

Heidarzadeh Shahriyar, Saeidi Ali, Lavoie Catherine et Rouleau Alain. (2021). Geomechanical characterization of a heterogenous rock mass using geological and laboratory test results: a case study of the Niobec Mine, Quebec. SN Applied Sciences, 3, e640.

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URL officielle: http://dx.doi.org/doi:10.1007/s42452-021-04617-1

Résumé

To conduct a successful geomechanical characterization of rock masses, an appropriate interpretation of lithological heterogeneity should be attained by considering both the geological and geomechanical data. In order to clarify the reliability and applicability of geological surveys for rock mechanics purposes, a geomechanical characterization study is conducted on the heterogeneous rock mass of Niobec Mine (Quebec, Canada), by considering the characteristics of its various identified lithological units. The results of previous field and laboratory test campaigns were used to quantify the variability associated to intact rock geomechanical parameters for the different present lithological units. The interpretation of geomechanical similarities between the lithological units resulted in determination of three main rock units (carbonatite, syenite, and carbonatite-syenite units). Geomechanical parameters of these rock units and their associated variabilities are utilized for stochastic estimation of geomechanical parameters of the heterogeneous rock mass using the Monte Carlo Simulation method. A comparison is also made between the results of probabilistic and deterministic analyses to highlight the presence of intrinsic variability associated with the heterogeneous rock mass properties. The results indicated that, for the case of Niobec Mine, the carbonatite-syenite rock unit could be considered as a valid representative of the entire rock mass geology since it offers an appropriate geomechanical approximation of all the present lithological units at the mine site, in terms of both the magnitude and dispersion of the strength and deformability parameters.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:3
Pages:e640
Version évaluée par les pairs:Oui
Date:Mai 2021
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Sciences appliquées
Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Unité d'enseignement en sciences de la Terre
Mots-clés:rock mass characterization, intact rock parameters, lithological heterogeneity, inherent variability, laboratory tests, Niobec mine, caractérisation des massifs rocheux, paramètres de roche intacte, lithologie, hétérogénéité, variabilité inhérente, essais en laboratoire, Mine Niobec
Déposé le:21 juin 2021 15:22
Dernière modification:21 juin 2021 15:22
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