井间地震初至波分析

英文篇名：Analysis to First Breaks in Cross Hole Seismic Waves
中文刊名：地球科学与环境学报
英文刊名：Journal of Earth Sciences and Environment
作者：张文波 ; 朱光明 ; 马德堂 ; 杜有成
英文作者：ZHANG Wen-bo~1 ; ZHU Guang-ming~1 ; MA De-tang~2 ; DU You-cheng~1 (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)
中文关键词：地质工程 ; 井间地震 ; 初至波 ; 多分量
英文关键词：geological engineering ; cross-hole seismic ; first break ; multi-component
出版日期：2006-03-30
机构：长安大学地质工程与测绘工程学院,长安大学地质工程与测绘工程学院,长安大学理学院,长安大学地质工程与测绘工程学院陕西西安710054,陕西西安710054,陕西西安710064,陕西西安710054
年：2006
期：01
出版单位：地球科学与环境学报

摘要

在模拟对比不同模型条件下初至波的基础上,分析了造成初至不清晰两种可能的原因,一种是初至波为续至波所干扰,另一种初至波在垂直方向上的投影很小甚至为零。并指出可以综合利用水平分量和垂直分量记录来提高初至时间拾取的精度。
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 outline.On the basis of modeling for the first break characters with different velocities,this paper discusses the reasons 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.

引文

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