Coupled processes in rock mass performance with emphasis on nuclear waste isolation

Yow, Jesse L.

doi:10.1016/s1365-1609(02)00009-6

Cited by 12 publications

(9 citation statements)

References 19 publications

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“…Millard et al [7] offered a comprehensive review of such codes within the scope of the DECOVALEX project. Due to the small variation range in the thermal diffusivity coefficient (in comparison with other parameters, such as hydraulic permeability) between the various rocks [16], evolution in the temperature field due to conduction behaves rather predictably and is reproduced quite reliably, even within fractured heterogeneous rocks. Its mechanical effects also tend to be well understood, provided that the mechanical parameters of both the rock matrix and fractures are known [5,6].…”

Section: Article In Pressmentioning

confidence: 99%

Influence of daily surface temperature fluctuations on rock slope stability: case study of the Rochers de Valabres slope (France)

Gunzburger

Merrien‐Soukatchoff

Guglielmi³

2005

International Journal of Rock Mechanics and Mining Sciences

140

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Section: Article In Pressmentioning

confidence: 99%

Influence of daily surface temperature fluctuations on rock slope stability: case study of the Rochers de Valabres slope (France)

Gunzburger

Merrien‐Soukatchoff

Guglielmi³

2005

International Journal of Rock Mechanics and Mining Sciences

140

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“…((l K ) 3 n K i n K j n K p n K l )σ lp (1) in which E 0 and ν 0 are the Young's modulus and Poisson's ratio of the undamaged material, respectively. The second-order crack density tensor Ω ij has been defined as:…”

Section: Damage Representationmentioning

confidence: 99%

“…These challenges are particularly acute in nuclear waste isolation projects, which have extremely demanding performance requirements. 1 The necessity to predict the behavior of the Excavation Damage Zone surrounding nuclear waste disposals causes this study. The geological barriers, often made of quasi-brittle material like granite or clay-rock, undergo damage during the excavation phase.…”

Section: Introductionmentioning

confidence: 99%

Coupled Analysis of Damage in Multiphase Media

Fathalikhani

Gatmiri

2012

J. Multiscale Modelling

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In this paper, the theoretical framework of a coupled thermo-hydro-mechanical damage model dedicated to non-isothermal unsaturated porous media is presented. The damage variable is a second-order tensor, and the model has been formulated in independent state variables. The approach combines thermodynamic and micromechanical theories. The behavior laws have been derived from a postulated expression of Helmholtz free energy. The damaged rigidities have been computed by applying the Principle of Equivalent Elastic Energy (PEEE). Internal length parameters have been introduced in the expressions of liquid water conductivity, to account for cracking effects on fluid flows. Damage has been assumed to have an isotropic influence on air and heat flows, through the inelastic component of volumetric strains. The damage model has been implemented in θ-Stock Finite Element program. Some numerical studies are conducted to the impact of the thermal and mechanical loading on the evaluation of response of the unsaturated bentonite, and investigation of model parameters effect on damage development.

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“…The importance of coupled thermal, hydrological and mechanical processes (THM) in geological media in the context of engineering is well recognized [1,2]. Areas of application where THM processes are of importance include nuclear waste isolation [3,4], geological sequestration of CO 2 [5,6], production of fossil fuels [7], underground gas storage [8], geothermal energy [9,10], and Arctic landscape [11].…”

Section: Introductionmentioning

confidence: 99%

A simulator for modeling coupled thermo-hydro-mechanical processes in subsurface geological media

Kelkar

Lewis

Karra

et al. 2014

International Journal of Rock Mechanics and Mining Sciences

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a b s t r a c tWe present the description of a fully coupled simulator FEHM for modeling coupled thermo-hydro-mechanical (THM) processes in geomedia. The coupled equations for fluid flow and energy transport are implemented using finite volume whereas Galerkin finite element method is used for mechanical force balance. The simulator is designed to address spatial scales on the order of tens of centimeters to tens of kilometers, and time scales on the order of hours to tens of years. The governing coupled nonlinear equations are solved using a Newton-Rapshon scheme with analytically or numerically computed Jacobians. A suite of models is available for coupling flow and mechanical deformation via permeability-deformation relationships. The coupled simulator is verified by comparing with several analytical solutions developed for this purpose. A subset of the simulator capabilities is benchmarked against commercially available simulators. We also demonstrate a good match with data from Desert Peak geothermal field in Nevada, USA. This validation required the use of a shear failure model with non-linear permeability-stress relationship. In addition, we present another application involving fluid injection into an inclined fault zone using a non-orthogonal grid with stress-dependent Young's modulus and permeability.Published by Elsevier Ltd.

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Coupled processes in rock mass performance with emphasis on nuclear waste isolation

Cited by 12 publications

References 19 publications

Influence of daily surface temperature fluctuations on rock slope stability: case study of the Rochers de Valabres slope (France)

Influence of daily surface temperature fluctuations on rock slope stability: case study of the Rochers de Valabres slope (France)

Coupled Analysis of Damage in Multiphase Media

A simulator for modeling coupled thermo-hydro-mechanical processes in subsurface geological media

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