Spectrum Characteristics Analysis of Microseismic Signals Transmitting between Coal Bedding
This study was performed to investigate the propagation law of microseismic signals transmitting along the direction parallel and vertical to the bedding in the process of coal rock rupture under uniaxial compression. Microseismic signals during the whole process of coal-rock deformation fracture until burst failure was tested by using the coal rock rupture microseismic experimental system. The Empirical Mode Decomposition graphic, Hilbert spectrum and time-frequency spectrum were obtained by using Hilbert-Huang Transform or HHT. Also the microseismic signals transmitting along the direction parallel and vertical to the bedding in the process of coal rock rupture were spectrum comparative analyzed with EMD analysis method. Results show that amplitude and velocity of microseismic signals changed very small along the parallel direction to bedding in the process of propagation, but microseismic signals delayed and amplitude weakened obviously along the vertical direction to bedding. Signal delay and signal attenuation were confirmed that bedding impact on microseismic wave transmitting.
Coal rock microseism signal bedding transmission spectrum characteristic
Li Chengwu Liu Jikun Wang Cuixia Li Jijun Zhang Hao
Faculty of Resource and Safety Engineering, China University of Mining & Technology, Beijing 100083, Shenyang Branch of China Coal Research Institute, Shenyang 110016, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
60-68
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）