应用分频解释技术预测无煤带  

The Application of Spectral Decomposition Techniques to Coal Barren Zone

作　　者：孟凡彬[1] 

机构地区：[1]中国煤炭地质总局地球物理勘探研究院,河北涿州072750

出　　处：《工程地球物理学报》2014年第2期229-233,共5页Chinese Journal of Engineering Geophysics

摘　　要：无煤带的问题影响着煤矿的采面划分,巷道布局及安全采掘施工,如何圈定无煤带的边界是煤矿开采非常关键的问题。通过对无煤带地质特征及其地震响应特征的分析,采用短时窗离散傅立叶变换的分频解释技术,分析频率数据体中调谐振幅随频率变化,获得了煤层与无煤带间存在着明显的频谱差异,从而得到高于传统分辨率的频谱数据。实现了分频解释技术在无煤带预测中的应用方法,地质效果较好。The coal barren zone is very important for the division of mine roadway arrangement and safety mining. The determination of its boundary was a big concern for mining. Through the analysis of the characteristics of the geology and seismic response, the short time Fourier transform of spectral decomposition method is used, which analyzes the tunable amplitude corresponding to the scanning frequency in the frequency domain. The clear difference between the coalseam and the coal barren zone is obtained, which can have more spectral data than the traditional resolution. Therefore, the application of spectral decomposition in the coal barren zone is successful and effective geologically.

关 键 词：分频技术 无煤带 傅立叶变换 频率 振幅 

分 类 号：P631.4[天文地球—地质矿产勘探]