|Table of Contents|

Analysis to First Breaks in Cross Hole Seismic Waves(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2006年第01期
Page:
70-74
Research Field:
Publishing date:

Info

Title:
Analysis to First Breaks in Cross Hole Seismic Waves
Author(s):
ZHANG Wen-bo1; ZHU G uang-ming 1; MA De-tang 2; DU You-cheng1
1. School of Geological Engineering and Surveying Engineering, Chang’ an University, Xi’an 710054, Shaanxi, China; 2. School of Science, Chang’ an University, Xi’an 710064, Shaanxi, China
Keywords:
geological engineering;  cross-hole seismic;  first break;  multi-component
PACS:
P631.8+1
DOI:
-
Abstract:
For some traces in field cross-hole seismic records of which the shot point is near to the receiver point in vertical direction, it is difficult to pick the first break time accurately according to the ambiguous first break out- line. On the basis of modeling for the first break characters with different velocities, this paper discusses the rea- sons induced to ambiguous first break outline. One is the influence of the second break wave, and the other is that the vertical projection of first break wave is near to zero. A method for picking first break time accurately is put forward by using both the vertical and the horizontal components synthetically.

References:

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Memo

Memo:
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Last Update: 2006-03-20