Mechanics and fluid transport in a degradable discontinuity

Selvadurai, A. P. S.; Nguyen, Truong

doi:10.1016/s0013-7952(99)00040-x

Cited by 26 publications

(10 citation statements)

References 12 publications

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“…Alterations to fracture permeabilities during glacial loadings are important but these extensions are not considered in this study. The estimation of the permeability of fractures in particular is governed by the hydraulic aperture of the fracture, which can be influenced by the normal and shear stresses acting on the fracture and gouge development (Nguyen and Selvadurai, 1998;Selvadurai and Nguyen, 1999;Selvadurai and Yu, 2005;Selvadurai, 2015). Discussions of these topics and references to further studies of this important topic are given by Boulon et al (1993), Nguyen and Selvadurai (1998) and Selvadurai (2015).…”

Section: A P S Selvadurai Et Al: Thermo-hydro-mechanical Processementioning

confidence: 99%

“…The mechanical response of a fractured rock mass to a glacial cycle was studied in the papers by Selvadurai and Nguyen (1995, 1999 and Steffen et al (2014); it was shown that fracture zones can lose stability or slip during or after the deglaciation period of the cycle. The glacial cycle scenario was also included in the DE-COVALEX studies …”

Section: Introductionmentioning

confidence: 99%

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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: A P S Selvadurai Et Al: Thermo-hydro-mechanical Processementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2015

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“…Identity (10) physically means that the macroscopic strain 2 is the sum of two contributions, namely rock matrix strains and displacement jump along the joints.…”

Section: Hill's Lemma For the Jointed Mediummentioning

confidence: 99%

“…Strength, deformation, and permeability coupling of rock joints have been widely investigated during the previous decades, and a large amount of experimental works and models are available in the literature. Representative works include references [1][2][3][4][5][6][7][8][9][10][11][12][13], to cite a few. A more complete review may be found for instance in the book by Indraratna and Ranjith [14].…”

Section: Introductionmentioning

confidence: 99%

Micromechanics approach to poroelastic behavior of a jointed rock

Maghous

Dormieux

Kondo

et al. 2011

Num Anal Meth Geomechanics

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International audienceThe formulation of macroscopic poroelastic behavior of a jointed rock is investigated within the framework of a micro-macro approach. The joints are modeled as interfaces, and their behavior is modeled by means of generalized poroelastic state equations. Starting from Hill's lemma extended for a jointed medium and extending the concept of strain concentration to relate the joint displacement jump to macroscopic strain, the overall poroelastic constitutive equations for the jointed rock are formulated. The analysis emphasizes the main differences and similarities of the resulting behavior with respect to that characterizing ordinary porous media. It is shown that, unlike ordinary porous media, conditions on the poroelastic parameters of joints are required for the macroscopic drained stiffness to entirely define the poroelastic behavior. This is achieved, for instance, if the joint network is characterized by a unique Biot coefficient. Extension of the analysis to non-linear poroelasticity is also outlined. Finally, the theoretical formulation is applied to two particular cases of jointed rock for which explicit expressions of the overall poroelastic parameters are derived. © 2011 John Wiley and Sons, Ltd

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“…The Coulomb model has been modified by a number of authors [62][63][64][65][66]. These studies have been extended [67,68] to include fractures in fluid-saturated poroelastic media where interface fluid flow characteristics can also be influenced by shear-induced dilatancy of the interface. The model proposed in Ref.…”

Section: Dilatant Interfacesmentioning

confidence: 99%