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http://dx.doi.org/10.7474/TUS.2020.30.4.335

Fault Reactivation Modeling Using Coupled TOUGH2 and FLAC3D Interface Model: DECOVALEX-2019 Task B  

Park, Jung-Wook (Geologic Environment Division, Korea Institute of Geoscience of Mineral Resources)
Park, Eui-Seob (Geologic Environment Division, Korea Institute of Geoscience of Mineral Resources)
Lee, Changsoo (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Publication Information
Tunnel and Underground Space / v.30, no.4, 2020 , pp. 335-358 More about this Journal
Abstract
We present a numerical model to simulate coupled hydro-mechanical behavior of fault using TOUGH-FLAC simulator. This study aims to develop a numerical method to estimate fluid injection-induced fault reactivation in low permeability rock and to access the relevant hydro-mechanical stability in rock as part of DECOVALEX-2019 Task B. A coupled fluid flow and mechanical interface model to explicitly represent a fault was suggested and validated from the applications to benchmark simulations and the field experiment at Mont Terri underground laboratory in Switzerland. The pressure build-up, hydraulic aperture evolution, displacement, and stress responses matched those obtained at the site, which indicates the capability of the model to appropriately capture the hydro-mechanical processes in rock fault.
Keywords
Fault reactivation; DECOVALEX-2019; Mont Terri Underground Research Laboratory; TOUGH-FLAC; Coupled Hydro-Mechanical Analysis;
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Times Cited By KSCI : 6  (Citation Analysis)
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