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《岩石力学与岩土工程学报(英文版)》 2013-03
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Short-and long-term behaviors of drifts in the Callovo-Oxfordian claystone at the Meuse/Haute-Marne Underground Research Laboratory

G.Armand a,,A.Noiret a,J.Zghondi a,D.M.Seyedi b a ANDRA R&D, Meuse/Haute-Marne Underground Research Laboratory, 55290 Bure, France b ANDRA R&D, 92298 Chatenay-Malabery, France  
Since 2000, the French National Radioactive Waste Management Agency (ANDRA) has been constructing an Underground Research Laboratory (URL) at Bure (east of the Paris Basin) to perform experiments in order to obtain in situ data necessary to demonstrate the feasibility of geological repository in the Callovo-Oxfordian claystone. An important experimental program is planned to characterize the response of the rock to different drift construction methods. Before 2008, at the main level of the laboratory, most of the drifts were excavated using pneumatic hammer and supported with rock bolts, sliding steel arches and fiber shotcrete. Other techniques, such as road header techniques, stiff and flexible supports, have also been used to characterize their impacts. The drift network is developed following the in situ major stresses. The parallel drifts are separated enough so as they can be considered independently when their hydromechanical (HM) behaviors are compared. Mine-by experiments have been performed to measure the HM response of the rock and the mechanical loading applied to the support system due to the digging and after excavation. Drifts exhibit extensional (mode I) and shear fractures (modes Ⅱ and Ⅲ) induced by excavation works. The extent of the induced fracture networks depends on the drift orientation versus the in situ stress field. This paper describes the drift convergence and deformation in the surrounding rock walls as function of time and the impact of different support methods on the rock mass behavior. An observation based method is finally applied to distinguish the instantaneous and time-dependent parts of the rock mass deformation around the drifts.
【CateGory Index】: TU411;TU458
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【Co-citations】
Chinese Journal Full-text Database 3 Hits
1 P.Delage Ecole des ponts ParisTech, Navier/CERMES, Paris, France;On the thermal impact on the excavation damaged zone around deep radioactive waste disposal[J];岩石力学与岩土工程学报(英文版);2013-03
2 Yuzhu Zhang;Wenbo Lu;Ming Chen;Peng Yan;Yingguo Hu;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;;Dam foundation excavation techniques in China:A review[J];岩石力学与岩土工程学报(英文版);2013-06
3 YANG Wen-dong;ZHANG Qiang-yong;LI Shu-cai;CHEN Fang;WANG Gang;College of Pipeline and Civil Engineering, China University of Petroleum;State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology;Research Center of Geotechnical and Structural Engineering, Shandong University;;Program implementation of nonlinear rheological model based on yield approach index piecewise function[J];Rock and Soil Mechanics;2013-09
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