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Report No.
 - 

Mizunami Underground Research Laboratory Project; Rock mechanical investigations annual report for fiscal year 2008

Hirano, Toru; Seno, Yasuhiro*; Matsui, Hiroya 

Japan Atomic Energy Agency is carrying out a geoscientific research project at the Mizunami, to establish the scientific and technological basis for geological disposal of HLW. The project is currently in Phase II. The Phase II goals are to construct models of the geological environment from all investigation results obtained during the construction. These models describe the geological environment at the construction points that were affected by excavation of the shafts and the galleries. To achieve these goals, we are examing the relationship between scope of investigation and accuracy of data, an assessment of investigation methods, validation of the Phase I geological environment models and construction of block scale geological environment models. As part of these studies, rock mechanical investigations involving both laboratory testing and in situ stress measurements every 100m along the shaft. This report presents the FY2008 activities undertaken to achieve the above goals.

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