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本文讨论P-SV转换波在横波勘探和纵横波联合勘探中的实用价值,以及P-SV转换波对野外观测、资料处理和解释的特殊要求。一般在临界角及大于临界角附近,才能观测到最强的P-SV波。基于P-SV波的入射和反射路径的不对称性,提出一种适用于P-SV波的选排方法。P-SV波的时距曲线仍然是一条近似的双曲线,但它包含着纵波和横波的双重影响,由此得到的速度称为复合速度,可用于动校正和叠加。
This paper discusses the practical value of P-SV converted waves in the joint exploration of S-wave and P- and S-wave as well as the special requirements of P-SV converted waves for field observation, data processing and interpretation. Generally the strongest P-SV wave can be observed at and near the critical angle. Based on the asymmetry of the incident and reflected paths of P-SV waves, a method of selecting and arranging P-SV waves is proposed. P-SV wave time curve is still an approximate hyperbola, but it contains the dual effects of longitudinal and shear waves, the resulting velocity is called the composite velocity, can be used for dynamic correction and superposition.