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A platform for research: civil engineering, architecture and urbanism
SITE-94. Modeling of rock fracture propagation for nuclear waste disposal
This report describes a numerical study of fracture propagation and fracture coalescence in the immediate vicinity of a tunnel and a deposition hole of a nuclear waste repository. We used the boundary element method (BEM) as our modeling tool. A new fracture propagation criterion was proposed and coupled into BEM and a computer-code for simulating fracture propagation was developed. Validation tests of this code against experimental results were also performed in a previous study. Four loading events were considered in this study: Excavation, Swelling pressure, Thermal loading, and Glaciation. Among the loading events, thermal loading and glaciation were found to cause major fracture propagation and fracture coalescence. Fracture propagation and coalescence enhance fracture shear displacement. In this study only the immediate vicinity of the tunnel and deposition hole was considered, and the shear displacement of fractures is limited to 2 mm. However, if we consider a wider area and longer fractures, the fracture shear displacement could be larger and may be harmful to the canister. 20 refs. (Atomindex citation 28:036452)
SITE-94. Modeling of rock fracture propagation for nuclear waste disposal
This report describes a numerical study of fracture propagation and fracture coalescence in the immediate vicinity of a tunnel and a deposition hole of a nuclear waste repository. We used the boundary element method (BEM) as our modeling tool. A new fracture propagation criterion was proposed and coupled into BEM and a computer-code for simulating fracture propagation was developed. Validation tests of this code against experimental results were also performed in a previous study. Four loading events were considered in this study: Excavation, Swelling pressure, Thermal loading, and Glaciation. Among the loading events, thermal loading and glaciation were found to cause major fracture propagation and fracture coalescence. Fracture propagation and coalescence enhance fracture shear displacement. In this study only the immediate vicinity of the tunnel and deposition hole was considered, and the shear displacement of fractures is limited to 2 mm. However, if we consider a wider area and longer fractures, the fracture shear displacement could be larger and may be harmful to the canister. 20 refs. (Atomindex citation 28:036452)
SITE-94. Modeling of rock fracture propagation for nuclear waste disposal
B. Shen (author) / O. Stephansson (author)
1996
66 pages
Report
No indication
English
Radioactive Wastes & Radioactivity , Radiation Shielding, Protection, & Safety , Geology & Geophysics , Soil & Rock Mechanics , Underground Disposal , Boreholes , Computerized Simulation , Fracture Mechanics , Geologic Fractures , Radioactive Waste Disposal , Rock Mechanics , Thermal Stresses , Foreign technology , EDB/540250 , EDB/052002
| British Library Online Contents | 1995
| TIBKAT | 1994