عنوان مقاله [English]
In underground coal mines, due to occurrence of probable events and the consequent risks, normally a reliable safe environment is not provided for the work forces and operational equipments. Through the risks, two main considerable damages may happen. First, the human injuries namely fatality, disability or maim and organ fractures and second the economical damages such as amortization and loss of mining equipments, and closure of working faces and galleries. Considering these types of crucial events this study aims on reducing the likely risks particularly in East Alborz Coal Mines Company. For this purpose, based on probability of event occurrences, their severities and outcomes the relevant risks have been assessed and analyzed. To achieve this goal by taking into account the occurrence probability and intensity a number of measures or standards were developed by the authors. Risk Priority Number (RPN) was introduced. By employing RPN the most impressive uncertainty factor in East Alborz Coal Mines Company was recognized. Finally, with the regard to the degree of damages caused by the events, a practical procedure for risk reduction in the mines has been presented.