煤层陷落柱的槽波频散特征研究

Study on Coal Subsided Column Channel Wave Dispersion Features

为了提高煤田槽波勘探技术在陷落柱探测中的精度,对三种不同尺度陷落柱的槽波衰减特征进行了分析。首先,根据槽波的形成机制与已经揭露的槽波资料,研究不同陷落柱几何尺度对槽波频散特征的影响;然后将FK方法应用于频散计算,探讨频散结果与陷落柱的几何特征关系;最后,根据频散特征对某工作面槽波异常区域进行分析验证,确定了4处异常为陷落柱,与实际揭露的陷落柱位置吻合较好。

To improve accuracy of subsided column survey in coalfield in-seam seismic prospecting,channel wave decay features of three subsided columns with different scale have been analyzed.Firstly,based on the channel wave formation mechanism and revealed channel wave information have studied impacts from subsided column different scales on channel wave dispersion features.And then using the FK method in dispersion computation,discussed the relationship between dispersion result and subsided column geometric features.Finally,based on dispersion features carried out analysis and verification for channel wave abnormal places in a working face,have determined four anomalies as subsided columns and all in good coincidence with practically revealed subsided columns.