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研究地震波原始记录特征,可为提高地震波层析成像探测地下孤石的精确度提供理论基础与科学依据.论文首先引用一地震波层析成像探测孤石的实例,并对其进行反演分析;然后对原始数据进行频谱分析,得出频谱图中高频能量强弱与地下介质高、低速介质分布有关;再分析单道地震波记录中的初至畸变与地下介质岩性突变异常相关,从而推测地下孤石分布的位置;最后经钻探成果资料的验证,充分说明地震波波场规律准确合理以及层析成像反演结果的精确度.
Studying the original recording features of seismic waves can provide a theoretical basis and a scientific basis for improving the precision of seismic wave tomography in detecting underground boulders.Firstly, an example of detecting boulders by seismic wave tomography is presented and then inversely analyzed; then The spectral analysis of the original data shows that the high-frequency energy in the spectrogram is related to the distribution of high and low velocity media in the subterranean media. The reanalysis of the first-arrival distortion in the single-channel seismic wave records correlates with the abrupt change of lithology in the subterranean media, The distribution of the rock; finally verified by the drilling results data, fully shows the accurate and reasonable seismic wavefield and the accuracy of tomographic inversion results.