Study on hydrogeology on the Mizunami Underground Research Laboratory Project annual report for fiscal year 2008

Takeuchi, Ryuji  ; Saegusa, Hiromitsu; Oyama, Takuya ; Keya, Hiromichi; Sato, Atsuya; Kosaka, Hiroshi; Takeda, Masaki ; Daimaru, Shuji; Takeuchi, Shinji

The Mizunami Underground Laboratory Project is a comprehensive research project investigating the deep underground environment within crystalline rock. The project goals of the project from surface-based investigation phase (Phase I) through to operation phase (Phase III) are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a range of engineering for deep underground application. Currently, the project is under the construction phase (Phase II). One of the Phase II goals, which is for the project goal, was set to develop and revise models of the geological environment using the investigation results obtained during excavation, and determine and assess changes in the geological environment in response to excavation. This document presents the overview of results of the research and development on "hydrogeology" performed in fiscal year 2008, with regard to the Phase II goal.