S变换时频分析在隧道岩溶地震勘探解释中的应用  

Application of S-Transform Time-Frequency Analysis in Seismic Prospection Interpretation for Karst Caves Under Tunnel

作　　者：刘振明[1] 顾汉明[1] 詹凤林[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,武汉430074

出　　处：《工程地球物理学报》2010年第1期50-54,共5页Chinese Journal of Engineering Geophysics

摘　　要：介绍了短时傅立叶变换、小波变换和S变换的优缺点及其彼此间的相互关系。详述了S变换的概念及性质,认为S变换方法具有良好的自适应性和时频分辨率,能提供高质量的时频谱信息。将S变换时频分析用于宜万铁路隧道地震映像法数据解释。结果表明,S变换时频剖面上的溶洞异常显示比时间剖面更为清晰,在推断岩溶的分布位置、大小、埋藏深度等方面具有良好效果。S变换方法有助于提高地震数据解释的精度和准确性。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 - adapt- ability and time - frequency resolution and can provide high - quality time - frequency infor- mation. 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.

关 键 词：S变换 地震映像法 岩溶 

分 类 号：P631.4[天文地球—地质矿产勘探]