Coupled hydromechanical modelling of the mine-by experiment at Meuse-Haute-Marne underground rock laboratory France
Published:January 01, 2014
K. Yildizdag, H. Shao, J. Hesser, A. Noiret, J. Soennke, 2014. "Coupled hydromechanical modelling of the mine-by experiment at Meuse-Haute-Marne underground rock laboratory France", Clays in Natural and Engineered Barriers for Radioactive Waste Confinement, S. Norris, J. Bruno, M. Cathelineau, P. Delage, C. Fairhurst, E. C. Gaucher, E. H. Höhn, A. Kalinichev, P. Lalieux, P. Sellin
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At the Meuse-Haute-Marne underground rock laboratory, France, a mine-by experiment was performed in the niche GCS by ANDRA. A 3D coupled hydraulic and mechanical (HM) continuum model was applied to understand the coupled HM mechanisms in the Callovo–Oxfordian claystone. Features such as transverse isotropy, shrinkage phenomena and permeability change induced by mechanical deformation were considered using the numerical code RockFlow. Intensive parameter studies in comparison with measured deformation and pore pressure data reduced model uncertainties. Fully saturated models showed very precise calculation results for the far-field zone sensors, but rapidly decreased pore pressure and continuously increased deformation in the near-field zone cannot be interpreted adequately even considering shrinkage and partially saturated flow models. A 2D isotropic damage model taking stiffness degradation into account was applied and acceptable calculation results were obtained for pore pressure evolution. However, the time-dependent deformation cannot be evaluated by the current model.
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Clays in Natural and Engineered Barriers for Radioactive Waste Confinement
This Special Publication contains 43 scientific studies presented at the 5th conference on ‘Clays in natural and engineered barriers for radioactive waste confinement’ held in Montpellier, France in 2012. The conference and this resulting volume cover all the aspects of clay characterization and behaviour considered at various temporal and spatial scales relevant to the confinement of radionuclides in clay, from basic phenomenological process descriptions to the global understanding of performance and safety at repository and geological scales. Special emphasis has been given to the modelling of processes occurring at the mineralogical level within the clay barriers.
The papers in this Special Publication consider research into argillaceous media under the following topic areas: large-scale geological characterization; clay-based concept/large-scale experiments; hydrodynamical modelling; geochemistry; geomechanics; mass transfer/gas transfer; mass transfer mechanisms.
The collection of different topics presented in this Special Publication demonstrates the diversity of geological repository research.