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Application of the electric discharge logging system; Hodenshiki jiban tansa system no tekiyo

Abstract

In the process of developing an electric discharge logging system, the advantage over other methods has become clear of P-wave initial amplitude damping coefficient analysis which is accomplished by measuring P-wave velocity in a hard rockbed and examining oscillation receiver bone sensitivity on the spot. In the hope of furthering the advantage, attention is paid to cracks in the rockbed that are deemed to influence damping, and the measurements by the subject system are compared with BSS measurements recorded at a K underground power station. The results of the analysis of P-wave initial amplitude damping coefficients, determined by the electric discharge logging system operated in a measuring hole provided in the cavity accommodating the station main equipment, disclose that there exists a high-coefficient region deeper in the ground where a part of the rockbed is weak. That is, it is inferred that the wide-range variation in damping coefficient detected at levels deeper than the 20.5m-deep hole dug in the arch enlargement corresponds to looseness in the rockbed. Cracks in the BSS records are grouped by aperture width, inclination angle, and strike. The rate of contribution to P-wave initial amplitude damping of each class of cracks is accepted as what shows  More>>
Authors:
Kudo, K; Yasuda, N; [1]  Kuniyasu, T; Kanda, K; Naito, Y; Tanaka, T
  1. Tokyo Electric Power Co. Inc., Tokyo (Japan)
Publication Date:
Oct 22, 1997
Product Type:
Conference
Report Number:
ETDE/JP-98751022; CONF-9710214-
Reference Number:
SCA: 150301; PA: JP-97:0G4585; EDB-98:072609; SN: 98001944521
Resource Relation:
Conference: 97. SEGJ conference, Butsuri tansa gakkai dai 97 kai (1997 nendo shuki) gakujutsu koenkai, Sapporo (Japan), 22-24 Oct 1997; Other Information: PBD: 22 Oct 1997; Related Information: Is Part Of Proceeding of the 97th (Fall, Fiscal 1997) SEGJ Conference; PB: 371 p.; Butsuri tansa gakkai dai 97 kai (1997 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
15 GEOTHERMAL ENERGY; SEISMIC SURVEYS; ELECTRIC DISCHARGES; ROCKS; DEFORMATION; SEISMIC P WAVES; ATTENUATION; WELL LOGGING; GEOLOGIC FISSURES; AMPLITUDES; UNDERGROUND; POWER PLANTS; OPENINGS; INCIDENCE ANGLE; GEOLOGIC STRATA
OSTI ID:
622759
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98751022; TRN: JN97G4585
Availability:
Available from Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, (Japan); OSTI as DE98751022
Submitting Site:
NEDO
Size:
pp. 326-330
Announcement Date:

Citation Formats

Kudo, K, Yasuda, N, Kuniyasu, T, Kanda, K, Naito, Y, and Tanaka, T. Application of the electric discharge logging system; Hodenshiki jiban tansa system no tekiyo. Japan: N. p., 1997. Web.
Kudo, K, Yasuda, N, Kuniyasu, T, Kanda, K, Naito, Y, & Tanaka, T. Application of the electric discharge logging system; Hodenshiki jiban tansa system no tekiyo. Japan.
Kudo, K, Yasuda, N, Kuniyasu, T, Kanda, K, Naito, Y, and Tanaka, T. 1997. "Application of the electric discharge logging system; Hodenshiki jiban tansa system no tekiyo." Japan.
@misc{etde_622759,
title = {Application of the electric discharge logging system; Hodenshiki jiban tansa system no tekiyo}
author = {Kudo, K, Yasuda, N, Kuniyasu, T, Kanda, K, Naito, Y, and Tanaka, T}
abstractNote = {In the process of developing an electric discharge logging system, the advantage over other methods has become clear of P-wave initial amplitude damping coefficient analysis which is accomplished by measuring P-wave velocity in a hard rockbed and examining oscillation receiver bone sensitivity on the spot. In the hope of furthering the advantage, attention is paid to cracks in the rockbed that are deemed to influence damping, and the measurements by the subject system are compared with BSS measurements recorded at a K underground power station. The results of the analysis of P-wave initial amplitude damping coefficients, determined by the electric discharge logging system operated in a measuring hole provided in the cavity accommodating the station main equipment, disclose that there exists a high-coefficient region deeper in the ground where a part of the rockbed is weak. That is, it is inferred that the wide-range variation in damping coefficient detected at levels deeper than the 20.5m-deep hole dug in the arch enlargement corresponds to looseness in the rockbed. Cracks in the BSS records are grouped by aperture width, inclination angle, and strike. The rate of contribution to P-wave initial amplitude damping of each class of cracks is accepted as what shows the geological conditions surrounding the station for the formulation of schematic diagrams exhibiting cracks along the W-E axis and N-S axis. 4 refs., 15 figs.}
place = {Japan}
year = {1997}
month = {Oct}
}