Method for judging relevancy between different areas of working face and coal spontaneous combustion

• Main Authors: GUO QING, REN WANXING
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for judging relevancy between different areas of a working face and coal spontaneous combustion, and relates to the field of goaf coal spontaneous combustion prevention and control. The method comprises the following steps: continuously collecting CO and O2 concentrations of different areas of a working surface, and then performing multi-scale evolution characteristic analysis on the CO and O2 concentrations by utilizing wavelet transform to obtain main periods and wavelet coefficients of the CO and O2 concentrations under different characteristic time scales; secondly, sine waves are selected to fit wavelet coefficients of CO and O2 in the first main period, and a wave equation of the wavelet coefficients of CO and O2 is obtained; finally, the phase difference and amplitude of CO and O2 are obtained according to the wave equation, and the relation between different areas and the coal spontaneous combustion relevancy can be obtained by comparing the phase difference and the in