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层状介质中地震波传播路径与各层介质的速度、界面产状及射线初始方向有关。当各层速度差异较大、界面产状各异时,应用平均速度进行空间归位作图,会严重歪曲构造形态,例如:海水与下伏层的产状及速度差异,碎屑岩与下伏石灰岩层的产状及速度差异等均属此类型。这也就是人们通常所说的速度陷井。为了准确地反映这类复杂层状介质的构造形态,本文介绍一种层状介质的空间归位方法。文中推导了全部计算公式,给出了作图方法,并列举了计算机自动绘制构造图的实例。本方法在一些地区使用,证明效果较好。
The propagation path of seismic waves in layered media is related to the velocity of the media in each layer, the interface shape and the initial direction of the ray. When the velocities of different layers are different and the interfaces have different shapes and shapes, the application of average velocity for spatial mapping will seriously distort the tectonic forms, for example, the difference in the occurrence and velocity between the seawater and the underlying layers, V limestone formation and velocity differences are the types. This is what people commonly call the speed trap. In order to accurately reflect the formation of such complex layered media, this paper presents a method of spatial location of layered media. In this paper, all the calculation formulas are deduced, the drawing methods are given, and examples of how the computer automatically draws the construction drawings are listed. This method is used in some areas, the effect is better.