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Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa

Abstract

The result is reported herein of a depth transform algorithm application utilizing equi-traveltime planes in reflection seismic exploration for the purpose of knowing the structure configuration in front of the tunnel face in a tunnel excavation process. A vibration producing hole was provided 0.5m above the ground surface while a vibration receiving hole was provided at 1.5m above the ground surface, and the excavated lengths were 1.5m and 0.5m, respectively. There were 24 recording channels, from which inline offset records were taken. The on-site records were subjected to 100-1000Hz band pass filtering. The elastic wave propagation rate in the rock used for depth conversion was set at 400m/s in consideration of the distance and direct wave travel time from the vibration source to the vibration receiving point. As the result of study, weak layers were found in the neighborhood of 230-240m, 260-270m, and 280-290m. This method requires less core memory for calculation and completes calculation in a shorter period of time, which enables a conclusion that it will be effective in grasping the 3-dimensional structure in front of the tunnel face in the working scene. 4 refs., 7 figs.
Authors:
Ashida, Y; [1]  Hirano, T [2] 
  1. Kyoto University, Kyoto (Japan). Faculty of Engineering
  2. Nishimatsu Construction Co. Ltd., Tokyo (Japan)
Publication Date:
May 01, 1996
Product Type:
Conference
Report Number:
CONF-9605233-
Reference Number:
SCA: 580000; 440700; PA: NEDO-96:913460; EDB-96:173388; SN: 96001687066
Resource Relation:
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
Subject:
58 GEOSCIENCES; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SEISMIC SURVEYS; REFLECTION; SEISMIC SOURCES; SEISMIC WAVES; TUNNELING; WORKING FACES; FILTRATION; FREQUENCY RANGE; ALGORITHMS; BOREHOLES; ROCK BEDS
OSTI ID:
395497
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97709027; TRN: 96:913460
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97709027
Submitting Site:
NEDO
Size:
pp. 132-135
Announcement Date:

Citation Formats

Ashida, Y, and Hirano, T. Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa. Japan: N. p., 1996. Web.
Ashida, Y, & Hirano, T. Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa. Japan.
Ashida, Y, and Hirano, T. 1996. "Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa." Japan.
@misc{etde_395497,
title = {Forward prediction of tunnel face by use of equi-traveltime planes; Tosojimen no riyo ni yoru tunnel kiriha zenpo tansa}
author = {Ashida, Y, and Hirano, T}
abstractNote = {The result is reported herein of a depth transform algorithm application utilizing equi-traveltime planes in reflection seismic exploration for the purpose of knowing the structure configuration in front of the tunnel face in a tunnel excavation process. A vibration producing hole was provided 0.5m above the ground surface while a vibration receiving hole was provided at 1.5m above the ground surface, and the excavated lengths were 1.5m and 0.5m, respectively. There were 24 recording channels, from which inline offset records were taken. The on-site records were subjected to 100-1000Hz band pass filtering. The elastic wave propagation rate in the rock used for depth conversion was set at 400m/s in consideration of the distance and direct wave travel time from the vibration source to the vibration receiving point. As the result of study, weak layers were found in the neighborhood of 230-240m, 260-270m, and 280-290m. This method requires less core memory for calculation and completes calculation in a shorter period of time, which enables a conclusion that it will be effective in grasping the 3-dimensional structure in front of the tunnel face in the working scene. 4 refs., 7 figs.}
place = {Japan}
year = {1996}
month = {May}
}