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Report No.
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Mizunami Underground Research Laboratory Project; Rock mechanical investigations annual report for fiscal year 2012

Sato, Toshinori  ; Tanno, Takeo*; Hikima, Ryoichi*; Sanada, Hiroyuki

This report presents the following FY2012 activities undertaken to achieve the above goals. (1) In-situ stress measurements using Compact Conical-ended Borehole Overcoring Technique at the - 300m stage, (2) In-situ stress measurements using core-based methods at the - 500m stage, (3) Laboratory tests using core samples from boreholes drilled at the - 500m stage, (4) Study on the modeling based on equivalent continuum model, (5) Phenomenological study on long-term behavior, (6) Theoretical study for estimating long-term behavior, (7) Application of specific energy for evaluation of in-situ rock mass properties, (8) Study on estimation of in-situ rock stress based on the results of various measurements.

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