摘要：Coal spontaneous combustion is a major disaster in underground mine. CO as a common indicator gas due to its good correlation with coal selfheating temperature. However, abnormal high concentration of CO was detected without coal fire during production process of some underground mines that not only impact production but also threat the safety of miners. To investigate the sources appointment of abnormal CO without coal spontaneous combustion, quantitative analysis of primordial and oxidation product were conducted with self-designed vacuum desorption and coal/gas interaction testing apparatus. The results indicated that CO as a gaseous product generated from coal oxidation under ambient temperature (18-22°C) was the main source in underground mine. Coal oxidation ability under ambient temperature was too partial to completely demonstrate coal spontaneous combustion propensity. Infrared spectra and ESR indicated the mechanism of coal oxidation under ambient temperature. It showed that oxygen- containing functional groups were prone to oxidation under ambient temperature. The results of the research could be improve the accuracy of early detection with CO for coal spontaneous combustion.
关键词：Carbon monoxide;primordial gas;ambient temperature oxidation;coal spontaneous combustion
