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There are wide areas of granitic rocks in the Japanese orogenic belt. These granitic bodies inevitably contain fracture and fault systems associated with alteration zones. However, relatively little attention has been given to the possible influence of such widely distributed alteration zones on the migration of radionuclides from any radioactive waste repository that might in future be sited within...
The excavation disturbed zone (EDZ) is defined as the rock zone where rock properties and conditions have been changed due to the processes induced by excavation, such as fracturing, stress redistribution and desaturation. Based on our results of the in situ blasting excavation disturbance experiment at the Tono mines, the rock mass around the drift behaved elastically and the excavation damage induced...
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