Study on the Geological Environment Influenced by Fault Movement(III)

Shingu, Kazuki*; Sato, Eitaro*; Adachi, Kazuhiro*; Kudo, Masakatsu*; Ishizuka, Yoshiaki*; Horinokuchi, Kenji*; Nakajima, Toshihide*

The objective of this study is to prove the long-term geoscientific stability of the geological environment. The survey will clarify the extent and degree of mechanical change influenced by fault movement deep underground as well as the surface. The study was conducted in Mozumi of the Kamioka mining district, located in the Atotsu active fault system zone. This year, a study was carried out by measuring stress state and rock properties around the active fault. At first, stress measurement by double fracturing was conducted at Nagato No.1 borehole in order to compare a newly measured stress state with the one done last year. The difference between them was very little. Secondly, the first stress measurement was carried out on the Nagato No.3 borehole.