Recent condition and trend of explosibility monitoring techniques for coal mine in China

Monitoring techniques for coal mine gas explosibility have experienced three developing stages: experience determination, import of technology and equipment, development by ourselves. In this paper authors divide monitoring technology of coal mine gas explosibility into three aspects: determining method and criterion of combustible gases explobibility, explosion suppression techniques, monitoring equipment, also give a systematic discussion on theories and main study contents, based on summing up, analyses and combination of more than ten years of their own practices. In this paper, static and dynamic triangle methods are discussed for determining coal mine gas explosibility. These two methods and development trend have been compared and analyzed. Various existing explosibility determining devices/installations have been described.