In-situ moisture monitoring methods for the sedimentary rocks as affected by temperature

Tsukuda, Akie*; Komatsu, Mitsuru*; Kishi, Atsuyasu

In this study, with the goal of applicability an in-situ measurement technique for monitoring generation of the unsaturated zone around a drift and performance of the artificial barrier, a set of water content measurement was carried out for the core samples collected during the excavation of pilot survey drift in a sedimentary rock formation. For the drill core collected Koetoi layer, FDR-V method was applied. FDR-V measures complex permittivity from reflection characteristic in the coaxial cable tip using an electromagnetic wave with high frequency. The results showed that the effects of the temperature on the measurement were insignificant.