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《岩石力学与岩土工程学报(英文版)》 2013-03
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Sealing of fractures in claystone

Chun-Liang Zhang Gesellschaft für Anlagen- und Reaktorsicherheit (GRS), P.O.Box 38122, Braunschweig, Germany  
The sealing behavior of fractures in clay rocks for deep disposal of radioactive waste has been compre- hensively investigated at the GRS laboratory. Various sealing experiments were performed on strongly cracked samples of different sizes from the Callovo-Oxfordian argillite and the Opalinus clay under rel- evant repository conditions. The fractured samples were compacted and flowed through with gas or synthetic pore-water under confining stresses up to 18 MPa and elevated temperatures from 20 C to 90 C. Sealing of fractures was quantified by measurements of their closure and permeability. Under the applied thermo-hydro-mechanical (THM) conditions, significant fracture closure and permeability decrease to very low levels of 10 19 to 10 21 m 2 were observed within time periods of months to years. The properties of the resealed claystones are comparable with those of the intact rock mass. All test results suggest high sealing potentials of the studied claystones.
【Fund】: co-funded by the European Commission (EC) as part of the sixth Euratom research and training Framework Programme (FP6) on nuclear energy under contract FP6-036449;; by the German Federal Ministry of Economics and Technology (BMWi) under contracts 02E10045 and 02E10377
【CateGory Index】: TU42
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Chinese Journal Full-text Database 1 Hits
1 C. L. Zhang, K. Wieczorek, M. L. Xie Repository Safety Research Division Company for Reactor Safety (GRS) mbH, Braunschweig, 38122, Germany;Swelling experiments on mudstones[J];岩石力学与岩土工程学报(英文版);2010-01
Chinese Journal Full-text Database 1 Hits
1 YANG Yongkang1,JI Chunxu2,KANG Tianhe1,CHAI Zhaoyun1(1.Institute of Mining Technology,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;2.China Building Material Geology Investigation Center Shanxi Unit,Taiyuan,Shanxi 030031,China);DAMAGE MECHANISMS OF MUDSTONE ROOF WITH GREAT-THICK IN COAL ROADWAY AND ITS CONTROLLING COUNTERMEASURES[J];Chinese Journal of Rock Mechanics and Engineering;2011-01
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