A statistical analysis of coal mine accidents caused by coal dust explosions in China

One hundred and six coal dust explosion accidents that occurred in China between the years of 1949 and 2007 were investigated through statistical methods so as to review the overall situation and provide quantitative information on coal dust explosions. Statistical characteristics about accident-related factors such as space, time, volatile ratio of coal dust, ignition sources, and accident categories were analyzed. Some special conclusions have been achieved. For example, most dust explosions were found to have occurred only in certain provinces and during certain months of the year. Such results may be helpful to prevent dust explosions in coal mines. Moreover, comments were made on SMS (safety management system) and safety culture. In conclusion, countermeasures were proposed in accordance with the results of statistical studies, including the change of safety check time.