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Takemura, Tomoyuki*; Takebe, Akimitsu*
JNC TJ7420 2005-052, 97 Pages, 2001/03
JNC-TJ7420-2005-052.pdf:64.24MB
In this study, artificial earthquake is triggered by gunpowder explosion near the surficial part of the Mozumi-Sukenobu Fault in the Atotsugawa Fault System, for the purpose of the basic data collection about the underground structure of the fault. And seismic wave derived from the explosion is observed on the surface and in the investigation tunnel across the fault.
Takemura, Tomoyuki*; Sakogaichi, Kaoru*; Takebe, Akimitsu*; Inoue, Motoi*; Niimi, Ken*; Kinoshita, Hirohisa*
JNC TJ7420 2005-051, 93 Pages, 1999/03
JNC-TJ7420-2005-051.pdf:23.99MB
The Atotsugawa active fault system (AFS) extends 60km or more in the northern Hida Mountains of central Japan, traced ENE to WSW trend. The Hietsu earthquake occurred along the AFS. The studies on the AFS started in April 1996 as
Takemura, Tomoyuki*; Sakogaichi, Kaoru*; Takahashi, Eiichiro*; Takebe, Akimitsu*; Nakajima, Toshihide*; Yamashita, Mitsugu*; Yamanouchi, Hirofumi*
JNC TJ7420 2005-041, 129 Pages, 1999/03
JNC-TJ7420-2005-041.pdf:65.88MB
The active fault survey tunnel that crossed the Mozumi-Sukenobu fault (a member of the Atotsugawa fault system) is located at the Kamioka mine, northern Gifu prefecture, Central Japan. The comprehensive study of the active fault such as the earthquake mechanism is done by using this tunnel. The purpose of this investigation is to define the hydrological characteristics inside and around the Mozumi - Sukenobu fault crush zones. The investigation is mainly Lugeon test and simple permeability test inside and around the crush zones.
Takemura, Tomoyuki*; Shingu, Kazuki*; Sakogaichi, Kaoru*; Nishikawa, Yuji*; Okada, Yoichi*; Nakajima, Toshihide*; Yamashita, Mitsugu*
JNC TJ7420 2005-035, 152 Pages, 1998/03
JNC-TJ7420-2005-035.pdf:27.16MB
The active fault survey tunnel that crossed the Mozumi-Sukenobu fault (MSF) is located at the Kamioka mine, northern Gifu prefecture, Central Japan. The comprehensive study of the active fault, such as the study of the earthquake mechanism and the development of the new initial stress measurement method is done by using this tunnel. One of the purposes of this investigation is to define the three-dimensional distribution of the MSF by geological survey, on the basis of the seismic and geophysical studies on this fault. The other purpose is to develop the new initial stress measurement method.
Takemura, Tomoyuki*; Shingu, Kazuki*; Takahashi, Eiichiro*; Okada, Yoichi*; Takebe, Akimitsu*; Nakajima, Toshihide*; Inoue, Toshio*
JNC TJ7420 2005-033, 128 Pages, 1998/03
JNC-TJ7420-2005-033.pdf:51.98MB
The active fault survey tunnel that crossed the Mozumi-Sukenobu fault (a member of the Atotsugawa fault system) is located at the Kamioka mine, northern Gifu prefecture, Central Japan. The comprehensive study of the active fault is done by using this tunnel. The purpose of this investigation is to define the hydrological characteristics of the Mozumi-Sukenobu fault crush zones. The permeability of the crush zones is measured by the Lugeon test and the simple injection test.