Fracture characteristics in Japanese rock

Ijiri, Yuji; ;

JNC TN8400 99-091, 69 Pages, 1999/11

JNC-TN8400-99-091.pdf:4.16MB

It is crucial for the performance assessment of geosphere to evaluate the characteristics of fractures that can be dominant radionuclide migration pathways from a repository to biosphere. This report summarizes the charactelistics of fractures obtained from broad literature surveys and the fields surveys at the Kamaishi mine in northern Japan and at outcrops and galleries throughout the country. The characteristics of fractures described in this report are fracture orientation, fracture shape, fracture frequency, fracture distribution in space, transmissivity of fracture, fracture aperture, fracture fillings, alteration halo along fracture, flow-wetted surface area in fracture, and the correlation among these characteristics. Since granitic rock is considered the archetype fractured media, a large amount of fracture data is available in literature. In addition, granitic rock has been treated as a potential host rock in many overseas programs, and has JNC performed a number of field observations and experiments in granodiorite at the Kamaishi mine. Therefore, the characteristics of fractures in granitic rock are qualitatively and quantitatively clarified to some extent in this report, while the characteristics of fractures in another rock types are not clarified.

None

PNC TJ8205 96-001, 33 Pages, 1996/02

PNC-TJ8205-96-001.pdf:3.81MB

no abstracts in English

Velocity measurements of the buoyancy-driven exchange flow between helium and air through a small opening

*; *; Fumizawa, Motoo

Kashika Joho Gakkai-Shi, 12(SUPPL.1), p.135 - 138, 1992/07

no abstracts in English

Experimental study on flow behavior at horizontal opening in the unstably stratified fluid

Fumizawa, Motoo; Ogawa, Masuro; Hishida, Makoto

Nihon Genshiryoku Gakkai-Shi, 31(10), p.1127 - 1127, 1989/10

https://doi.org/10.3327/jaesj.31.1127

no abstracts in English