Analysis Of Safety Input-output In Coal Mine Based On DEA Model

In recent years, the million tons death rate in China's coal mine goes down year by year, but it is still high compareing with other countries in the world. The situation of safety production status is grim. There may be many reasons for that, for example, the safety investment is relative less than the other countries, and the awareness of safety investment is still in the initial stage, and so on.In view of the above problem, this paper first analyzes the connotation of safety investment and benefit,discusses the theory of safety input-output,and the calculation of accident cost,and then builds the model of safety input-output ratio.Secondly, this paper chooses input and output indexs in the DEA model, and according to the paper,chooses the C2R and BC2 model based on the need of this paper.Thirdly, this paper takes five coal mine that investigated as decision making units, chooses the most poor effective coal mine to be research object based on the results of the model, then takes the year as decision making units in the model, establishes C2R and BC2 model, the calculation of model completely realizes in the Matlab software. The result of analysis shows that the safety management level in this enterprise is in the primary stage, the direction of safety input isn't reasonable,and the safety input should be improved in the future,and then based on the results of BC2 model,the coal should increase investment in safety education and daily security management importantly; based on the results of the model, the year that scale efficiency increasing should improve the safety input furthermore.At last, this paper analyzes the questions existing in the coal mine, and gives suggestions about them. This paper provides a new analytical perspective for safety investment decision-making form the view of safety input-output analysis. It optimizes the structure of safety investment, and makes the decision-making of safety investment scientificly in coal mine, providing reference for the safety management and decision-making.