1989 Fiscal Year Final Research Report Summary

Geometric and Mechanical Properties of Discontinuities of Rock and Its Characteristics of Flow

Research Project

Project/Area Number	63550464
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	資源開発工学
Research Institution	Kyushu University
Principal Investigator	ESAKI Tetsuro Kyushu Univ., Faculty of Eng., Associate Professor, 工学部, 助教授 (40038609)
Co-Investigator(Kenkyū-buntansha)	KIMURA Tsuyoshi Kyushu Univ., Faculty of Eng., Research Associate, 工学部, 助手 (30161566)
Project Period (FY)	1988 – 1989
Keywords	Rock Mechanics / Shear Test / Permeability / Nuclear Disposal / Laboratory Test / Underground Utilization / Discontinuity
Research Abstract	The subject of underground utilizations that is representative of radioactive waste disposal has enhanced the importance of investigating water flow characteristics of fractured rock masses. From this point of view, this research describes the characteristics obtained by using a new testing apparatus which has developed to enable shear-flow coupling test. Each granite specimen, 80・100・120mm, used for the tests includes an artificially made fracture parallel to the lift plane of rock. It is found from the coupling test that the permeability of the specimens decreases with increasing normal stress and increases so much with shear displacement. Such shear-flow characteristics agree with some predicted ones, taking account of the theoretical and physical apertures, and roughness of a fractured surface.

(2 results)