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首页> 外文会议>International Symposium on Mine Safety Science and Engineering >Spectrum and Energy Distribution Characteristic of Electromagnetic Emission Signals during Fracture of Coal
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Spectrum and Energy Distribution Characteristic of Electromagnetic Emission Signals during Fracture of Coal

机译：煤炭骨折期间电磁发射信号的光谱和能量分布特性

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Using the electromagnetic emission of coal-rock testing system, the relation between load change and electromagnetic emission of coal under uniaxial compression was investigated in the laboratory, and the power spectrum density and wavelet energy spectrum coefficients of electromagnetic emission signals were analyzed. The results show that the electromagnetic emission signals are closely related to the deformation and fracture of coal, and their frequencies are positively correlated with crack propagation velocity and crack density and show a trend of first increase, then decrease and final increase; the electromagnetic emission signals are distributed mainly in 50-500 kHz band; the energy characteristic of electromagnetic emission signals, which is deduced by the wavelet energy spectrum coefficient method, shows that the signals concentrate in 93.75-750 kHz band, and there is a certain correlation between the energy change in 375-750 kHz band and the intensity of electromagnetic radiation signals.
机译：利用煤岩检测系统的电磁排放，在实验室中研究了单轴压缩下煤的负载变化与电磁排放的关系，分析了电磁发射信号的功率谱密度和小波能谱系数。结果表明，电磁发射信号与煤的变形和断裂密切相关，其频率与裂纹传播速度和裂纹密度正相关，并显示出第一增加的趋势，然后减少和最终增加;电磁发射信号主要分布在50-500 kHz频段中;由小波能谱系数法推断的电磁发射信号的能量特性表明，信号集中在93.75-750 kHz波段中，在375-750 kHz波段和强度的能量变化之间存在一定的相关性电磁辐射信号。

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