Laboratory Validation Test of Dry-Fracture Method of Stress Measurement

Shingu, Kazuki*; Nakajima, Toshihide*; Yamashita, Mitsugu*

The active fault survey tunnel across the Mozumi-Sukenobu Fault is located at the Kamioka Mine, northern Gifu prefecture, Central Japan. At present, the comprehensive studies of the active fault are being carried out in this tunnel. In this report, the results of the laboratory test using steel pipes and numerical simulation for the new ground stress measuring instrument were presented in order to inspect the stress state around the active fault.