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
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Kudo, K;
Yasuda, N;
[1]
Kuniyasu, T;
Kanda, K;
Naito, Y;
Tanaka, T
- Tokyo Electric Power Co. Inc., Tokyo (Japan)
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}
}
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}
}