【摘要】 地下岩石中普遍存在着由地应力诱导排列的垂直裂隙或裂缝．地震横波通过这样的介质传播时，会发生横波分裂．文中首先推导了含裂隙介质中零井源距垂直地震部面（ＶＳＰ）记录的解析表达式，然后就不同方位裂隙组成的多层介质使用伪谱法模拟了二分量横波分裂的ＶＳＰ记录，最后利用ＶＳＰ记录的解析式分析了模拟的ＶＳＰ记录中的横波分裂．结果表明，尽管三分量ＶＳＰ记录中包含了横波分裂现象，但未经过特定的计算机处理和显示时，一般不能从ＶＳＰ记录上直观看到横波分裂现象．更多还原

【Abstract】 There widespreadly exist the stress-induced vertical align cracks or microcracks in the rock. The seismic shear waves propagated through the media are split. That is called shear wave birefriengonce. The paper presents theexpressions of the zero-offset vertical seismic profling (VSP) in cracked media,and then simulates the two--component shear wave VSP seismograms in the varieties of crack--oriented layered media; Based on the results, the characteristics of shear wave splitting are analysed. All this shows that we could observe the shear wave splitting from the VSP’s daal only through careful processing and displaying, although there may be the shear wave splitting phenomena in the three -component VSP records.更多还原