井间地震初至波分析  

Analysis to First Breaks in Cross Hole Seismic Waves

作　　者：张文波[1] 朱光明[1] 马德堂[2] 杜有成[1] 

机构地区：[1]长安大学地质工程与测绘工程学院,陕西西安710054 [2]长安大学理学院,陕西西安710064

出　　处：《地球科学与环境学报》2006年第1期70-74,共5页Journal of Earth Sciences and Environment

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.

关 键 词：地质工程 井间地震 初至波 多分量 

分 类 号：P631.81[天文地球—地质矿产勘探]