Characteristics of transmitting channel wave in a coal seam

查看全文 作　　者：YANG [1,2]Zhen;GE Mao-[1]chen;WANG Shu-[1]gang

机构地区：[1]School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China;[2]College of Earth and Mineral Scienc, The Penn State University, PA 16802, USA

出　　处：《Mining Science and Technology》索引2009年第19卷第3期,共6页

基　　金：Project B2532532 supported by the U.S. Mine Safety and Health Administration 摘　　要：An embedded underground coal seam carries channel waves of low seismic velocity along a stratigraphic rock-coal-rock sequence.In a homogeneous and isotropic seam, seismic waves propagate as trapped waves within the seam, which leads to propagation of channel waves.We describe how to set up a field test for transmission in order to acquire channel waves in a coal seam.Because 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 waves.The advantage of using a wavelet transformation is that different resolutions can be obtained at different times and different frequencies.According 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. 关键词：煤层信道特性传输小波变换分析传播渠道地震信号地震波传播各向同性

相关文献

参考文献（8）
引证文献（8）
耦合文献（0）

参考文献(8)

引证文献(8)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Characteristics of transmitting channel wave in a coal seam

参考文献(8)

引证文献(8)

用户提示