10:45 AM - 11:00 AM
[HCG21-06] Compilation of results of the Mizunami Underground Research Laboratory Project and effective utilization of data and cores
Keywords:Mizunami Underground Research Laboratory Project, Mizunami Underground Research Laboratory, Regional Hydrogeological Study Project
The Mizunami Underground Research Laboratory (MIU) Project focused on crystalline rock (granite) was conducted at the Tono Geoscience Center of the Japan Atomic Energy Agency (JAEA) in Mizunami City, Gifu Prefecture, from 1996. In the MIU Project, surface-based investigations, investigation during construction of shafts and research galleries, and research in the excavated shafts and galleries were performed at the Mizunami Underground Research Laboratory (MIU) located on the land of Mizunami City, and at the Shobasama Site owned by JAEA. Research and development on the project was completed in FY 2019 since sufficient results were achieved for the five-year research issues from FY 2015 to FY 2019.
In FY1992, the Regional Hydrogeological Study Project was initiated in the Tono area, including the MIU, as an example, with the aim of establishing techniques for investigating and analyzing groundwater flow and quality in a wide area (more than several km square) at great depths (up to 1,000 m depth) and for evaluating the validity of the results of such investigation and analysis. This study was also completed in FY2019 with the completion of the MIU project research and development.
In the MIU Project and the Regional Hydrogeological Study Project, investigation equipment that can investigate groundwater depths of up to 1,000 m, investigation and analysis techniques such as modeling of the geological environment, and techniques to investigate and evaluate changes in groundwater pressure and water quality during excavation and closure of shafts and galleries have been developed. Furthermore, through the construction of the research galleries, engineering techniques for construction and maintenance of galleries have been developed, and scientific knowledge of the geological environment peculiar to Japan has been accumulated.
Research activities and results of the Mizunami Underground Research Laboratory (MIU) Project and the Regional Hydrogeological Study have been compiled and published in reports per investigation phase and per project period, in addition to the annual reports for each fiscal year. All of these results, experiences and know-how, however, are not able to be incorporated into the reports such for each investigation phase, etc., thus the Tono Geoscience Center has independently compiled them and made published on its website. The unpublished data, such as data during borehole investigations, are also available for downloading from the website.
As for cores obtained from borehole investigations, they have also been stored and are available for external use if appropriate. Accordingly, investigation and analysis combining core and borehole data are also possible and can be widely used not only for research and development but also as a material for engineer training.
In FY1992, the Regional Hydrogeological Study Project was initiated in the Tono area, including the MIU, as an example, with the aim of establishing techniques for investigating and analyzing groundwater flow and quality in a wide area (more than several km square) at great depths (up to 1,000 m depth) and for evaluating the validity of the results of such investigation and analysis. This study was also completed in FY2019 with the completion of the MIU project research and development.
In the MIU Project and the Regional Hydrogeological Study Project, investigation equipment that can investigate groundwater depths of up to 1,000 m, investigation and analysis techniques such as modeling of the geological environment, and techniques to investigate and evaluate changes in groundwater pressure and water quality during excavation and closure of shafts and galleries have been developed. Furthermore, through the construction of the research galleries, engineering techniques for construction and maintenance of galleries have been developed, and scientific knowledge of the geological environment peculiar to Japan has been accumulated.
Research activities and results of the Mizunami Underground Research Laboratory (MIU) Project and the Regional Hydrogeological Study have been compiled and published in reports per investigation phase and per project period, in addition to the annual reports for each fiscal year. All of these results, experiences and know-how, however, are not able to be incorporated into the reports such for each investigation phase, etc., thus the Tono Geoscience Center has independently compiled them and made published on its website. The unpublished data, such as data during borehole investigations, are also available for downloading from the website.
As for cores obtained from borehole investigations, they have also been stored and are available for external use if appropriate. Accordingly, investigation and analysis combining core and borehole data are also possible and can be widely used not only for research and development but also as a material for engineer training.