Characteristics of transmitting channel wave in a coal seam

作     者：YANG Zhen GE Mao-chen WANG Shu-gang 

作者机构：School of Mines China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China College of Earth and Mineral Scienc The Penn State University PA 16802 USA 

出 版 物：《Mining Science and Technology》 (矿业科学技术（英文版）)

年 卷 期：2009年第19卷第3期

页      面：331-336页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081901[工学-采矿工程] 081802[工学-地球探测与信息技术] 0808[工学-电气工程] 0709[理学-地质学] 0819[工学-矿业工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project B2532532 supported by the U.S. Mine Safety and Health Administration 

主　　题：in-seam seismic technique channel wave coal seam time-frequency domain Gabor wavelet velocity spectrum 

摘      要：An embedded underground coal seam carries channel waves of low seismic velocity along a stratigraphic rock-coal-rock *** a homogeneous and isotropic seam, seismic waves propagate as trapped waves within the seam, which leads to propagation of channel *** describe how to set up a field test for transmission in order to acquire channel waves in a coal *** channel wave signals are non-stationary in their frequencies and amplitudes, a necessary velocity spectrum and wavelet transformation analysis are applied to interpret the characteristics of channel *** advantage of using a wavelet transformation is that different resolutions can be obtained at different times and different *** to analysis of the seismic signals acquired in the S7 sensor hole, it was clearly shown that the characteristics of channel waves are lower frequencies and attenuation which can guide an effective wave for detecting voids, boundaries and faults in coal seams with strong roofs and floors.