The spontaneous combustion of coal seams is one of the major disasters in the mines, which seriously threatens the safe production of coal mines and endangers the safety of workers. Through the research on the current situation and development trend of coal mine fire prevention technology in China, the development history of coal mine fire prevention technology in China was traced. The basic principles and main features of coal mine fire monitoring technology, gel fire prevention technology, grouting fire prevention technology, inhibitor fire prevention technology and pressure equalization ventilation fire prevention technology were analyzed. The main achievements, applicability and existing problems of various fire prevention technologies in China were highlighted. Finally, the development direction and research trend of China's future mine fire prevention and control technology were put forward.

Coal spontaneous combustion fire seriously threatens the safety of mine production. How to improve the prediction accuracy of coal spontaneous combustion is a hot topic in current research. The critical temperature point of coal spontaneous combustion and the temperature point of C2H4 occurrence were determined by the temperature-programmed oxidation simulation experiment of coal spontaneous combustion. Taking the reliability of each prediction index as the weight and introducing the error weakening factor, the multi-index fusion prediction model of coal spontaneous combustion was constructed, and the multi-index fusion prediction method of coal spontaneous combustion was put forward. The multi-index fusion prediction method can significantly improve the accuracy of coal spontaneous combustion prediction. The research method can provide theoretical guidance for the prevention of mine fire.