Research on risk assessment of coal mine safety hidden dangers

The existing risk rating of coal mine safety hidden dangers is simply superposition of hidden dangers, risk evaluation of hidden dangers does not consider time factor, so it cannot achieve purpose of real-time early warning, nor reflect state of hidden dangers at different times. Moreover, risk evaluation is not closely integrated with closed-loop management process of hidden dangers identification, and it cannot reflect dynamic changes of risks. For the above problems, the life cycle of coal mine safety hidden dangers was analyzed, including its formation, development and evolved into an accident, the single hidden dangers risk and regional hidden dangers risk were comprehensively evaluated combing with the process of hidden dangers identification and warning management, and corresponding emergency treatment mechanism was established. Using evaluating-point approach, the single hidden dangers risk was evaluated from the difficulty of identification, vulnerability and controllability, the duration of hidden dangers rectification is included in the hidden dangers risk evaluation, so as to reflect hidden dangers status at different times in real time, which is more in line with the development law of hidden dangers. According to restrictive relationship between identification and management ability and dynamic dominant hidden dangers, the regional hidden dangers risk was evaluated comprehensively, on the basis of risk value and characteristics of region, different early warning levels can be set to realize comprehensive early warning of regional hidden dangers. Considering factors of hidden dangers identification and management ability in the regional hidden dangers risk evaluation, can more accurately reflect the risk degree and risk trend of regional hidden dangers.