Thermo-hydro-mechanical response of granite to temperature changes

Najari, M.; Selvadurai, A. P. S.

doi:10.1007/s12665-013-2945-3

Cited by 35 publications

(20 citation statements)

References 38 publications

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“…The pattern of fluid flow both within and at the base of a glacier can be a complex THM process by itself. Problems associated with the mechanics of glaciers (Weertman, 1972;Marshall, 2005), the motion of glaciers (Fowler, 1981(Fowler, , 2011Morland, 1987;Picasso et al, 2004;Gomez et al, 2013;Stucki and Schlunegger, 2013;Ahlkrona et al, 2013;Thoma et al, 2014), the constitutive properties of ice and ice-rock interfaces (Picasso et al, 2004;Marshall, 2005;Headley et al, 2012;Tezaur et al, 2015), the contact with the bedrock and the evolution of their shapes (dell'Isola and Hutter, 1998;Picasso et al, 2004;Dietrich et al, 2010;Headley et al, 2012;Nielsen et al, 2012;Pollard and deConto, 2012;Gomez et al, 2013;Stucki and Schlunegger, 2013;Steffen et al, 2006;de Boer et al, 2014) have been studied. The glacier dynamics on a centennial timescale due to climatic warming was studied by Hambrey et al (2005).…”

Section: The Initial Boundary Value Problemmentioning

confidence: 99%

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015

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Abstract. The paper examines the coupled thermo-hydromechanical (THM) processes that develop in a fractured rock region within a fluid-saturated rock mass due to loads imposed by an advancing glacier. This scenario needs to be examined in order to assess the suitability of potential sites for the location of deep geologic repositories for the storage of high-level nuclear waste. The THM processes are examined using a computational multiphysics approach that takes into account thermo-poroelasticity of the intact geological formation and the presence of a system of sessile but hydraulically interacting fractures (fracture zones). The modelling considers coupled thermo-hydro-mechanical effects in both the intact rock and the fracture zones due to contact normal stresses and fluid pressure at the base of the advancing glacier. Computational modelling provides an assessment of the role of fractures in modifying the pore pressure generation within the entire rock mass.

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Section: The Initial Boundary Value Problemmentioning

confidence: 99%

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015

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“…In recent years, the coupled thermal–hydrological–mechanical (THM) behaviour in porous media has been a subject of great interest in many engineering disciplines, such as geothermal energy extraction, recovery of hydrocarbons, safety assessment of waste repositories for radioactive waste, and geological sequestration of CO 2 [ 1 , 2 , 3 , 4 ]. Based on Biot’s theory of the isothermal consolidation of elastic porous media, the phenomenological approach of poroelasticity [ 5 , 6 ], and the mixture theory as described by Morland [ 7 ] and Bowen [ 8 ], many coupled THM models and computer codes have been developed [ 3 , 9 , 10 , 11 ]. In particular, the framework of international projects like DECOVALEX (DEvelopment of COupled models and their VALidation against Experiments) [ 12 , 13 , 14 , 15 ], and the tunnel sealing experiment in the Underground Research Laboratory, Canada [ 16 ] has dramatically promoted the study of the THM coupling process [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Coupled Thermal–Hydrological–Mechanical Damage Model and Its Numerical Simulations of Damage Evolution in APSE

et al. 2016

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This paper proposes a coupled thermal–hydrological–mechanical damage (THMD) model for the failure process of rock, in which coupling effects such as thermally induced rock deformation, water flow-induced thermal convection, and rock deformation-induced water flow are considered. The damage is considered to be the key factor that controls the THM coupling process and the heterogeneity of rock is characterized by the Weibull distribution. Next, numerical simulations on excavation-induced damage zones in Äspö pillar stability experiments (APSE) are carried out and the impact of in situ stress conditions on damage zone distribution is analysed. Then, further numerical simulations of damage evolution at the heating stage in APSE are carried out. The impacts of in situ stress state, swelling pressure and water pressure on damage evolution at the heating stage are simulated and analysed, respectively. The simulation results indicate that (1) the v-shaped notch at the sidewall of the pillar is predominantly controlled by the in situ stress trends and magnitude; (2) at the heating stage, the existence of confining pressure can suppress the occurrence of damage, including shear damage and tensile damage; and (3) the presence of water flow and water pressure can promote the occurrence of damage, especially shear damage.

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“…Other mechanical and physical properties of the Stanstead granite are documented in the experimental studies presented in [102,103]. Table 1 provides typical results for the mineralogical composition of the Stanstead granite documented in [103][104][105][106]. Investigation of the permeability of the Stanstead granite was presented in [78,79,102].…”

Section: The Granitic Rocksmentioning

confidence: 99%

Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield

2020

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Granitic rock from the western part of the Canadian Shield is considered as a potential host rock for the siting of a deep geological repository for the storage of heat-emitting high-level nuclear fuel waste. The research program focused on the use of surface permeability measurements conducted at 54 locations on a 300 mm cuboid of granite, obtained from the Lac du Bonnet region in Manitoba, to obtain an estimate for the effective permeability of the cuboid. Companion experiments are conducted on a 280 mm cuboid of granite obtained from Stanstead, Quebec, located in the eastern part of the Canadian Shield. The surface permeabilities for the cuboids of granite are developed from theoretical relationships applicable to experimental situations where steady flow is initiated at a sealed annular surface region with a pressurized central domain. The experimental values for the surface permeability are used with a kriging procedure to estimate the permeability variations within the cuboidal region. The spatial variations of permeability are implemented in computational models of the cuboidal regions to determine the one-dimensional permeabilities in three orthogonal directions. The effective permeability of the granite cuboids is estimated by appeal to the geometric mean. The research provides a non-destructive methodology for estimating the effective permeability of large specimens of rock and the experiments performed give estimates for the effective permeability of the two types of granitic rock obtained from the western and eastern flanks of the Canadian Shield.

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Thermo-hydro-mechanical response of granite to temperature changes

Cited by 35 publications

References 38 publications

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

A Coupled Thermal–Hydrological–Mechanical Damage Model and Its Numerical Simulations of Damage Evolution in APSE

Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield

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