Prediction method and new monitoring technology of goaf spontaneous combustion fire

The characteristic of mine goaf spontaneous combustion was introduced and summarized. The gas index method and temperature measurement method for predicting and forecasting goaf spontaneous combustion were analyzed. Qualitative and quantitative analysis of coal oxidation spontaneous gas products based gas index method was carried out especially. The new monitoring technologies including on-line in-situ monitoring of spontaneous combustion spectrum, distributed optical fiber temperature measurement, joint early warning of fire gas and temperature and air leakage measurement were discussed. Finally, the development trend was discussed through studying the existent technical problem of spontaneous combustion forecasting and monitoring.