Test and Analysis of Electromagnetic Radiation in the Process of Coal Oxidation and Spontaneous Combustion

The detection of the spontaneous combustion of coal is restricted by the underground environment, and the existing fire detection methods have certain limitations. Efficient and quick detection of a concealed fire is of great importance to the prevention and control of coal spontaneous combustion fires. For this paper, an experimental test system for coal oxidation heating and combustion electromagnetic radiation (EMR) was constructed, the temperature-EMR of coal oxidation heating and combustion under a constant heat source was carried out and the EMR variation characteristics of coal during the oxidation process was studied. Coal can produce significant EMR signals during the process of coal oxidation heating and combustion, and these EMR signals have a significant correlation with the characteristic temperature. The micro-mechanism of free electron generation in the process of coal oxidation heating and combustion was analyzed, and the generation mechanism of EMR was obtained. Finally, the method of detecting spontaneous combustion of coal by EMR was used. The research results may be applied to the detection of spontaneous combustion of coal.