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Takeuchi, Akira*; Takebe, Akimitsu*; Ongirad, H.*; Doke, Ryosuke*
Geodynamics of Atotsugawa Fault System, p.1 - 10, 2007/00
no abstracts in English
Takebe, Akimitsu*; Higashihara, Masami*; Takami, Akira*
JNC TJ7420 2005-067, 132 Pages, 2001/03
JNC-TJ7420-2005-067.pdf:33.3MB
The comprehensive studies are being carried out for the deep structure of the active fault, characteristics of the fault fracture zone and stress states of the rock nearby the fault. As one of them, an in-situ rock stress measurement by hydrofracturing method was attempted on a nearby active fault in the survey tunnel at Kamioka Mine. This report describes the hydrofracturing method and results of the in-situ rock stress measurement.
Takebe, Akimitsu*; Higashihara, Masami*; Takami, Akira*
JNC TJ7420 2005-060, 211 Pages, 2001/03
JNC-TJ7420-2005-060.PDF:34.25MB
One of purposes in the Inland Underground Structure Frontier Investigation is the development of the dry-fracture method to get basic data on in-situ stress states around an active fault. In previous experiments using concrete specimen and steel pipe, the dry-fracture method was determined to be reasonable. This report describes the laboratory validation test of dry-fracture method by re-boring in the difficult case to maintain the naked borehole in the bad ground situation.
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.
Sakogaichi, Kaoru*; Takebe, Akimitsu*
JNC TJ7420 2005-040, 62 Pages, 2000/03
JNC-TJ7420-2005-040.pdf:17.96MB
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*; 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*; 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.