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摘要: 煤矿井下采集到的槽波通常包括Rayleigh型槽波和Love型槽波，这两种类型的波场具有不同的偏振特点，由于目前现有的槽波处理软件和方法仅针对单一类型的波场，因此在数据处理过程中两种波场互为干扰，影响了后续频散分析和槽波成像的质量。从煤层槽波中Rayleigh型槽波和Love型槽波的基本偏振方程出发，利用两种波场的不同偏振特征，推导出一种时间域的波场直接分离方法，该方法具有经验参数少、算法稳健的特点；通过模型数据和实际数据的波场分离验证，取得了满意的结果。Abstract: During in-seam seismic exploration, the seam wave record often comprises Rayleigh and Love seam waves simultaneously, and the characteristics of the polarization of these two seam waves are different. However, in most cases, the existing processing software system and methods were developed for only one of these two seam waves. Accordingly, the Rayleigh and Love seam waves interfere with each other in the subsequent processing such as dispersion analysis and imaging. On the basis of the fundamental polarization equation of the Rayleigh and Love seam waves, this paper proposed a direct separation method of these two seam waves. Compared to other methods, the direct method has the advantages of less artificial influence and more robust, and it was validated by analog and real dataset.
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Keywords:
- in-seam seismic exploration /
- polarization /
- wave field separation
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