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引言众所周知,当地下岩层的地震波速度随深度正常递增时,用地震折射波法可获得多层不同界面深度。但如果某一地层的速度低于其上覆地层的速度,或如该层太薄或它的速度虽稍比上覆地层的速度高却不足以构成第一个波至,这样的地层不能用常规折射波法检测到。因为这种情况时距曲线图上没有任何一条与该层对应的曲线,也就是说这样的地层被隐蔽起来了。因此,这种隐蔽层的存在将导致该层以下所有界面深度的计算出现误差。
Introduction As we all know, when the seismic velocity of the local rock strata increases normally with the depth, the depth of multi-layer interface can be obtained by the seismic refraction wave method. However, such a formation can not be used if the speed of a formation is lower than the speed of its overlying formation, or if it is too thin or its speed is slightly higher than that of the overburden, but not enough to form the first wave Conventional refraction wave method is detected. Because in this case, there is no curve corresponding to this layer on the graph, that is to say, such a layer is hidden. Therefore, the presence of such a concealed layer will result in errors in the calculation of the depth of all the interfaces below that layer.