Research On Characteristics And Signal Analysis And Processing Technology Of Electromagnetic Emission In Fracture Of Coal-rock

In this paper, experimental research, the method of combining theoretical analysis to study the damage of coal or rock the occurrence of electromagnetic radiation signal mechanism and signal characteristics. Hammer destructive testing using simulated coal coal failure process of stress release, using infrared spectroscopy to the destruction of coal of different hardness before and after the changes in the hydrogen bond study of the molecular characteristics of coal before and after the destruction of the changes in the use of hydrogen bond breakage the principle of charge transfer occurs analysis of electromagnetic radiation generation mechanism. Experimental study of the coal under uniaxial compression damage in the process of electromagnetic radiation signal characteristic; using spectral analysis technical analysis of the failure process of coal in the different frequency signals power spectral density distribution characteristics; using wavelet theory in different frequency bands of electromagnetic radiation signal and background noise characteristics, study of electromagnetic radiation based on wavelet transform the signal noise reduction principles; using Hilbert-Huang Transform (HHT) method, by EME signals in the overall empirical mode decomposition method (EEMD) decomposition, the calculation Hilbert energy spectrum and marginal spectrum of electromagnetic radiation to determine the signal characteristics of the main band of electromagnetic radiation prediction methods laid the foundation for field application.