[en] The drilling of galleries induces damage propagation in the surrounding medium and creates the Excavation Damaged Zone (EDZ) in which the material properties are modified. The prediction of the fracture structure and flow properties evolution within this zone are major issues especially in the context of underground nuclear waste storage. Since experimental results indicate that shear strain localisation appears prior to fractures, we model the EDZ with strain localisation in shear band mode using the coupled local second gradient model. The evolution of the intrinsic hydraulic permeability inside the fractures is taken into consideration as well as the influence of gallery ventilation on the rock desaturation. The numerical results provide information about the damaged zone extension, structure and behaviour with good correspondence to in situ measurements and observations.
Disciplines :
Civil engineering
Author, co-author :
Pardoen, Benoît ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Levasseur, Séverine ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Collin, Frédéric ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Language :
English
Title :
Excavation damaged zone modelling including hydraulic permeability evolution in unsaturated argilaceous rock
Publication date :
July 2014
Event name :
6th International Conference on Unsaturated Soils, UNSAT 2014
Event organizer :
University of New South Wales (UNSW), International Society for Porous Media (Interpore)
Event place :
Sydney, Australia
Event date :
from 02 to 04-07-2013
Audience :
International
Main work title :
Unsaturated Soils: Research & Applications
Main work alternative title :
[en] 6th International Conference on Unsaturated Soils
Editor :
Khalili, Nasser
Russell, Adrian R.
Khoshghalb, Arman
Publisher :
CRC Press, Taylor and Francis Group, London, United Kingdom
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