Research On Comprehensive Assessment System And Application Of Coal Mine Safety Risks

Coal is an important basic energy and raw material in our country, and occupies an important strategic position in the national economy. The present situation of safety production is still severe in domestic coal mines that the total amount of coal mine accidents is still high and great accidents occur frequently. Therefore, in order to find out the deep-rooted causes of this situation of domestic coal mine, grasp the main factors affecting coal mine safety production and estimate the security level of corporate。This paper deeply analyzed the characteristics, composition, mainly affecting factors and the interaction mechanism of domestic coal mine safety risk system by comprehensively using the thinking and method of system engineering such as safety engineering, safety management, statistical theory etc and based on system theory, control theory, accident-causing theory. The index system of comprehensive evaluation in domestic coal mine was established and the risk comprehensive evaluation model on the basis of the index system was constructed as well as the safety comprehensive evaluation model based on entropy method and gray correlation analysis. By taking four coal mines of Huaibei Mining Group as the research objects, the risk comprehensive evaluation model and the safety comprehensive evaluation model were applied to estimate the level of coal mine, at the same time, put forwarding the corresponding safety production system for domestic coal mine which was applied. The research has very important theoretical and practical significance for the coal mine to seek a good scientific measure to improve work safety situation and bring about a thorough change.The main research results are as follows:(1) The theory and methods of safety risk comprehensive evaluation for coal mine were researched systematically. Based on the safety-related theory, risk assessment theory, risk management theory, safety production index theory and accident-causing theory, the concept of coal mine safety risk system, safety risk index etc were studied systematically. The references were provided for the coal mine safety risk comprehensive assessment through analyzing security risk management theory commonly used in domestic coal mine.(2) The characteristics of coal mine safety risk system were analyzed deeply. Then, the main influence factors of security risk of coal mine were determined which were classified, refined, combined and integrated according to six different aspects of inherent risk, personnel, equipment, environment, management and mine hazard source. Meanwhile, the interactions among the factors were analyzed. According to the basic design principles of coal mine safety risk index system, safety risk index system of domestic coal mine was established by using expert analysis, on-site research and other methods, which included the following seven index systems, they were the inherent security risks indexes of mine, personnel security risk indexes, equipment safety risk indices system, environmental safety risk indices, management security risk indices, hazard sources risk indices and accidents and occupational hazard indices.(3) According to the characteristics of influence factors of coal mine safety risk system, the national laws and regulations, industry standards and so on, the meaning of the security risk indicators were defined with on-site research and expert consultation, which were lying a foundation for the quantitative analysis of safety risk indices later.(4) The risk comprehensive evaluation model of coal mine based on the safety risk indices was constructed and the weights of each index were determined by using hierarchy analysis method. The empirical analysis of the model was made by using the evaluation samples and parameter matrix, and security risk of four coal mines in Huaibei Mining Group were synthetically commented which showed the comprehensive risk index of Luling mine was the highest followed by Taoyuan mine and Qinan mine, the comprehensive risk index of Zhuxianzhuang mine was the lowest, the best security.(5) The safety risk comprehensive evaluation model of coal mine was constructed based on entropy method and gray relational analysis, and then the correlation of indexes was determined by gray relational analysis and the equilibrium degree of each index was obtained by entropy method. The empirical analysis of the model was made based on the evaluation samples and parameter matrix gaining the safety degree of four mines in Huaibei Mining Group. After conducting a comprehensive sort, the result indicated that safety degree of Zhuxianzhuang Mine was the highest, after that Qinan Mine, then Taoyuan Mine and Luling Coal Mine.The calculation results of comparative analysis between two evaluation model was made, and the result showed that comprehensive evaluation had a better consistency which indicated the advantage and disadvantage of safety degree of the various mines. As a result, both models were able to reflect the actual security situation in the mine and be applied to comprehensive evaluation of the coal mine safety risk with local dynamics, variable weights, multi-attribute and non-linear characteristics.(6) According to the results of coal mine safety risk evaluation, the measures should be taken from the different aspects of the policies and regulations of coal mine safety production, security system of human resources, s security system of safety production technology and equipment, security system of emergency rescue and security system of safety information and so on, to build coal mine security system of safe production, and take a mine as an example. The security system of safe production in coal mine has an great significance for reversing the passive situation of safety production in domestic coal mine as soon as possible.