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Ozaki, Yusuke; Kohashi, Akio; Onoe, Hironori
no journal, ,
no abstracts in English
Nohara, Tsuyoshi; Takeuchi, Ryuji; Sakai, Toshihiro
no journal, ,
Focusing on the characteristics of the faults and fractures of the MIU, based on analysis of existing data and on geological investigations, we examined the geological and hydrological features of the deep underground granitic rocks in the site scale. As a result, main permeable structures of granitic rocks can be associated with the old structures formed with the faulting and/or hydrothermal activity in geological times. Furthermore, we examined the distribution of the major permeable structures, based on the distribution of the geological structures.
Onoe, Hironori; Takayasu, Kentaro; Hayashida, Kazuki; Takeuchi, Ryuji; Iwatsuki, Teruki
no journal, ,
no abstracts in English
Hayashida, Kazuki; Kato, Toshihiro; Kubota, Mitsuru; Onoe, Hironori; Iwatsuki, Teruki
no journal, ,
no abstracts in English
Takayasu, Kentaro; Keya, Hiromichi; Onoe, Hironori; Takeuchi, Ryuji
no journal, ,
The reflood test which fills the part of the tunnel of depth 500m with groundwater is being put into effect for the purpose of exemplification of the recovery ability of the geological environment in the bedrock which was disturbed by construction and operation of large-scale underground facilities, and development of observation and evaluation technique of geological environment recovery at The Mizunami Underground Research Laboratory (MIU). Water pressure observation devices were installed in the tunnel and in each observation section in the surrounding bedrock, and groundwater pressure change in this test was observed. Similarity of water pressure change between the tunnel and each observation section was considered by arranging observed water pressure change data as derivative plots and focusing their shapes.
Yamamoto, Shinya*; Sakurai, Hideyuki*; Onoe, Hironori; Masumoto, Kiyoshi*
no journal, ,
no abstracts in English
Murakami, Hiroaki; Sasao, Eiji; Tanaka, Kazuhiro*
no journal, ,
no abstracts in English