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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 problem of coal-free zone affects the division of coal face, layout of roadway and safe excavation. How to delineate the boundary of non-coal zone is a key issue in coal mining. Based on the analysis of geological characteristics and seismic response characteristics of non-coal belt, the frequency-shifted interpretation of the tuning amplitude of the frequency data body is analyzed with the frequency-divided interpretation technique of short-time window discrete Fourier transform, and the obvious difference exists between coal seam and non-coal belt Of the spectral differences, resulting in higher than the traditional resolution of spectral data. This method has realized the application method of frequency-division interpretation in coal-free zone prediction and has good geological effects.