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《Chinese Journal of Engineering Geophysics》 2010-01
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Application of S-Transform Time-Frequency Analysis in Seismic Prospection Interpretation for Karst Caves Under Tunnel

Liu Zhenming,Gu Hanming,Zhan Fenglin (Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China)  
This paper shows the advantages,disadvantages and correlation of Short-Time Fourier Transform,Wavelet Transform and S-Transform.Expatiating the idea and property of the S-Transform,we find that the S-Transform method has favorable self-adaptability and time-frequency resolution and can provide high-quality time-frequency information.We use S-Transform Time-Frequency Analysis to interpret seismic imaging data under tunnel of YiChang-WanZhou Railway.The result indicates that the abnormal karst caves represented by S-Transform time-frequency spectrum are clearer than that in the original seismic profile.In the filed of determining the location,size,burial,depth of karst caves,S-Transform is a good method.S-Transform helps to improve the interpretative precision and accuracy of seismic imaging data.
【CateGory Index】: P631.4
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