A study of the approaches for coal washing enterprises to identify sources of hazards and carry out risk analysis, assessment and control

Identification of sources of hazards and risk assessment are important links in safety operation management in coal enterprises, and constitute also a basis for taking precautionary measures. With an aim to enhance the safety operation management level in coal washing sector, based on analysis on identification of sources of hazards and risk assessment, a study is made of the risk assessment methods; and five risk control measures are proposed. Study results show that for a coal washing enterprise, the comprehensive risk analysis method for finding out both internal and external causes, and the methods for making analysis on risk of equipment failure mode, zonal risk and task risks should preferably be used, and the comprehensive risk analysis needs to be made by following the proposed steps; for assessment of risks of equipment failure mode, zonal risks and task risks, the qualitative method, semi-quantitative matrix method and working condition's danger analysis method(LCE method) should be used, respectively; based on assessment results, engineering, technical, managerial and emergency measures, as well as other precautionary and preventive measures like personal training and physical protection need to be taken to check the risks in their embryonic stage or reduce the loss to a minimum; The coal washing enterprises should be provided with monitoring, control and alarm systems with the use of advanced information, network, automation and intelligent technologies for making it possible to issue early warning in the event of possible occurrence of unbearable risks to ensure operation and personal safety; whenever major internal or external changes occur, the work on identification of sources of hazards and risk analysis needs to be repeated within a certain scope to ensure that the hazard, if only, is under control and the coal washing systems are safe in operation.