Impact of stress on solute transport in a fracture network: A comparison study  

作　　者：Zhihong Zhao Jonny Rutqvist Colin Leung Milan Hokr Quansheng Liu Ivars Neretnieks Andrew Hoch Jirí Havlíek Yuan Wang Zhen Wang Yuexiu Wu Robert Zimmerman 

机构地区：[1]Royal Institute of Technology,Stockholm,Sweden [2]Lawrence Berkeley National Laboratory,Berkeley,USA [3]Imperial College,London,UK [4]Technical University of Liberec,Czech Republic [5]Institute of Rock and Soil Mechanics,Chinese Academy of Sciences [6]Wuhan University [7]Serco TAS,Didcot,UK [8]Hohai University [9]Tongji University

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2013年第2期110-123,共14页岩石力学与岩土工程学报（英文版）

基　　金：the context of the international DECOVALEX-2011 Project;LBNL from NDA via SERCO TAS was provided through the U.S. Department of Energy Contract No. DE-AC02-05CH11231;supported by the Ministry of Education of the Czech Republic within the SGS project No. 7822/115 on the TUL

摘　　要：This paper compares numerical modeling of the effect of stress on solute transport （advection and matrix diffusion） in fractured rocks in which fracture apertures are correlated with fracture lengths. It is mainly motivated by the performance and safety assessments of underground radioactive waste repositories. Five research teams used different approaches to model stress/deformation, flow and transport pro- cesses, based on either discrete fracture network or equivalent continuum models. The simulation results derived by various teams generally demonstrated that rock stresses could significantly influence solute transport processes through stress-induced changes in fracture apertures and associated changes in per- meability. Reasonably good agreement was achieved regarding advection and matrix diffusion given the same fracture network, while some observed discrepancies could be explained by different mechanical or transport modeling approaches.This paper compares numerical modeling of the effect of stress on solute transport （advection and matrix diffusion） in fractured rocks in which fracture apertures are correlated with fracture lengths. It is mainly motivated by the performance and safety assessments of underground radioactive waste repositories. Five research teams used different approaches to model stress/deformation, flow and transport pro- cesses, based on either discrete fracture network or equivalent continuum models. The simulation results derived by various teams generally demonstrated that rock stresses could significantly influence solute transport processes through stress-induced changes in fracture apertures and associated changes in per- meability. Reasonably good agreement was achieved regarding advection and matrix diffusion given the same fracture network, while some observed discrepancies could be explained by different mechanical or transport modeling approaches.

关 键 词：Fractured rocks Solute transport Discrete element method Equivalent continuum Dual-porosity model Particle tracking method 

分 类 号：TU45[建筑科学—岩土工程]