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http://dx.doi.org/10.7474/TUS.2020.30.6.519

Review of Numerical Approaches to Simulate Time Evolution of Excavation-Induced Permeability in Argillaceous Rocks  

Kim, Hyung-Mok (Department of Energy Resources and Geosystems Engineering, Sejong University)
Park, Eui-Seob (Deep Subsurface Research Center, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Tunnel and Underground Space / v.30, no.6, 2020 , pp. 519-539 More about this Journal
Abstract
We reviewed numerical approaches to assess a hydraulic properties of excavation-disturbed zone (EDZ)created in argillaceous sedimentary rocks. It has been reported that fractures in the sedimentary rocks containing expansive clays are gradually closing due to swelling and their permeabilities are evolving to the level of in-tact rock, which is known as a self-healing or self-sealing process. The numerical approaches introduced here are capable of simulating spatio-temporal variation of EDZ permeability during long-term operation of a repository by including the self-healing characteristics of fractures, which wa observed in laboratory as well as in-situ experiments, The applicability of the numerical approaches was verified from the comparison to in-situ measurements of EDZ permeability at underground research laboratories.
Keywords
EDZ; Argillaceous Sedimentary rock; Self-healing; Self-sealing; Permeability;
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Times Cited By KSCI : 4  (Citation Analysis)
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