Abstract：
Accurately detecting the arrival time of a channel wave in a coal seam is very important for in-seam seismic data processing. The arrival time greatly affects the accuracy of the channel wave inversion and the computed tomography (CT) result. However, because the signal-to-noise ratio of in-seam seismic data is reduced by the long wavelength and strong frequency dispersion, accurately timing the arrival of channel waves is extremely difficult. For this purpose, we propose a method that automatically picks up the arrival time of channel waves based on multi-channel constraints. We first estimate the Jaccard similarity coefficient of two ray paths, then apply it as a weight coefficient for stacking the multi-channel dispersion spectra. The reasonableness and effectiveness of the proposed method is verified in an actual data application. Most importantly, the method increases the degree of automation and the pickup precision of the channel-wave arrival time.
. Automatic pickup of arrival time of channel wave based on multi-channel constraints[J]. APPLIED GEOPHYSICS, 2018, 15(1): 118-124.
[1]
Li, X. P., Schott, W., and Rüter, H., 1995, Frequency dependent Q-estimate of Love-type channel waves and the application of Q-correction to seismograms: Geophysics, 60(6), 1773-1789.
[2]
Cheng, J. Y., Ji, G. Z., and Zhu, P. M., 2012, Love Channel-waves dispersion characteristic analysis for typical coal models: Journal of China Coal Society, 27(1), 67-71.
[3]
Liu, T. F., Pan, D. M., and Li, F. C., et al., 1994, Channel seismic exploration: Running press book publishers, 114-117.
[4]
Dersen, L., and Rüter, H., 1994, Seismic coal exploration Part B: In-seam seismic. Oxford: Pergamon, 107-114.
[5]
Park, C. B., Miller, R. D., and Xia, J., 1998, Imaging dispersion curves of surface waves on multi-channel record: SEGTechnical Program Expanded Abstracts, 17, 1377-1380.
[6]
Dziewonski, A., and SBloch, M., 1969, A Technique For the Transient Seismic Signals: Bull. Seism. Soc. Am., 59(1), 427-444.
[7]
Räder, D., Schott, W., Dresen, L., and Rüter, H., 1985, Calculation of dispersion curves and amplitude-depth distribution of Love channel waves in horizontally layered media: Geophysical Prospecting, 33, 800-816.
[8]
Evison, F. F., 1955, A coal seam as a guide for seismic energy: Nature, 176, 1224-1225.
[9]
Yang, X. H., Cao, S. Y., Li, D. C., et al., 2014, Analysis of quality factors for Rayleigh channels: Applied Geophysics, 11(1), 107-114.
[10]
Jaccard, P., 1912, The distribution of the flora in the alpine zone: New Phytologist, 11(2), 37-50.
[11]
Zhang, X. L., Fu, Y. Z., and Chu, P. X., 2015, Application of Jaccard Similarity Coefficient in Recommender System: Computer Technology and Development, 24(4), 158-165.
[12]
Kerner, C., and Dresen, L., 1985, The influence of dirtbands and faults on the propagation of Love seam waves:Journal of Geophysics, 57, 77-89.
[13]
Zhou, Q. Y., He, Y. F., Jing, P., et al., 2006, Using MFT Obtain Rayleigh-Wave Dispersion Curve: Northw Eastern Seismological Journal, 28(1), 46-50.
[14]
Krey, T., 1963, Channel waves as a tool of applied Geophysics in coal mining: Geophysics, 28(5), 701-714.
[15]
Kristen, B., 2000, Determination of near-surface variability using Rayleigh waves: PhD Thesis, University of Alberta.
[16]
Li, X. P., Schott, W., and Rüter, H., 1995, Frequency dependent Q-estimate of Love-type channel waves and the application of Q-correction to seismograms: Geophysics, 60(6), 1773-1789.
[17]
Liu, T. F., Pan, D. M., and Li, F. C., et al., 1994, Channel seismic exploration: Running press book publishers, 114-117.
[18]
Park, C. B., Miller, R. D., and Xia, J., 1998, Imaging dispersion curves of surface waves on multi-channel record: SEGTechnical Program Expanded Abstracts, 17, 1377-1380.
[19]
Räder, D., Schott, W., Dresen, L., and Rüter, H., 1985, Calculation of dispersion curves and amplitude-depth distribution of Love channel waves in horizontally layered media: Geophysical Prospecting, 33, 800-816.
[20]
Yang, X. H., Cao, S. Y., Li, D. C., et al., 2014, Analysis of quality factors for Rayleigh channels: Applied Geophysics, 11(1), 107-114.
[21]
Zhang, X. L., Fu, Y. Z., and Chu, P. X., 2015, Application of Jaccard Similarity Coefficient in Recommender System: Computer Technology and Development, 24(4), 158-165.
[22]
Zhou, Q. Y., He, Y. F., Jing, P., et al., 2006, Using MFT Obtain Rayleigh-Wave Dispersion Curve: Northw Eastern Seismological Journal, 28(1), 46-50.
2018, Vol. 15 
