TY - CONF TI - Application of streaming potential method for detection of fractures in granitic rock; Kamaishi kozan ni okeru ryutai ryudo den`iho tekiyo shiken AB - Measurements were made using the streaming potential method for the purpose of investigating the expansion of hydration cracks, direction of their propagation, and the chaining of cracked surfaces, in the granitic rock. Tests were conducted by use of a bore hole in the gallery wall. The bore hole yielded approximately 400 liters of water per minute, the bore hole was closed and then opened, and the change with the passage of time in the spontaneous potential (SP) on the gallery wall was measured. At a spot 31.2m from the mine entrance, the SP dropped by 15mV simultaneously with the opening of the bore hole, and rose by 14mV simultaneously with the closure of the same. The phenomenon was true for other locations, that is, for the section from the mine entrance to a spot 9.0m therefrom, and for a section beginning at 15.0m and ending at 19.2m therefrom. No change in the SP was observed in a group of cracks with water springing out of the gallery roof, beginning at a point 40m and ending at a point 54m from the mine entrance. The result suggests the possible application of the streaming potential method to the investigation of cracks. 1 ref., 10 figs. AU - "Negi, T" AU - "Yokoi, K" AU - "Yoneda, Y [Nittetsu Mining Co. Ltd., Tokyo (Japan)]" AU - "Senba, T [Power Reactor and Nuclear fuel Development Corporation, Tokyo (Japan)]" KW - "44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS" KW - "ELECTRIC POTENTIAL" KW - "FLUID FLOW" KW - "GRANITES" KW - "GEOLOGIC FISSURES" KW - "TUNNELS" KW - "WALLS" KW - "MEASURING METHODS" KW - "ROCK DRILLING" KW - "WATER SPRINGS" DO - https://doi.org/ UR - https://www.osti.gov/etdeweb/servlets/purl/395519 PB - CY - Japan PY - 1996 DA - 1996-05-01 LA - Japanese J2 - [] VL - C1 - Society of Exploration Geophysicists of Japan, Tokyo (Japan) C2 - C3 - CONF-9605233- C4 - C5 - Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97709027 L3 - Conference: 94. SEGJ (The Society of Exploration Geophysicists of Japan) Conference, Butsuri tansa gakkai dai 94 kai (1996 nendo shunki) gakujutsu koenkai, Tokyo (Japan), 15-17 May 1996; Other Information: PBD: May 1996; Related Information: Is Part Of Proceedings of the 94th SEGJ (The Society of Exploration Geophysicists of Japan) Conference; PB: 475 p.; Butsuri tansa gakkai dai 94 kai (1996 nendo shunki) gakujutsu koenkai koen ronbunshu ER -