Analysis of the characteristics of AE wave using boring core of sedimentary soft rock and study on the field measurement of AE for the evaluation of EDZ (Joint research)

Aoki, Kenji*; Mito, Yoshitada*; Minami, Masayuki*; Matsui, Hiroya ; Niunoya, Sumio*

To understand the size and state of EDZ is one of the problems in the technological development for geological disposal of HLW. AE which is measured directly and evaluate EDZ is paid to attention inside and outside the country, and the utility is reported for the crystalline rock. However, there are few cases to measure AE in sedimentary soft rocks because of the difficulty to acknowledge a few AE waves with small energy. The author consulted AE properties of Horonobe siliceous rocks from laboratory tests and evaluated size and state of EDZ from numerical analysis.