基于三类危险源理论的事故模式及隐患提取方法OACHSSCDCSTPCD

In response to the current problems of unclear and ambiguous accident pattern descriptions and the deficiencies of unprofessional and incomplete identification of hidden dangers,this study provided a general definition,connotation,and extraction steps for accident model.The relationship between accident mode and hidden dangers was explained,and a method for finding hidden danger points in production sites based on accident mode was put forward.Referring to the"classification for casualty accidents of enterprise staff and workers(GB 6441-1986)",statistics on larger and higher safety accidents in the chemical industry from 2000 to 2022,and the probability of occurrence of different categories of hidden dangers were analyzed.By analyzing the accident root causes,barrier failures and accident types in the propylene loading scenario of a petrochemical enterprise,the accident mode of propylene loading was extracted and the hidden danger characteristic table was generated.The results showed that the probability of occurrence of the first type of hidden danger in unsafe state and the first,sixth and thirteenth types of hidden danger in unsafe behavior was higher in the typical accident types of chemical industry.The number of hidden danger items identified for preventing propylene leakage by setting barriers in the propylene loading scenario accounted for the highest proportion,approximately 48.94％.The occurrence probability of hidden danger items involved in N=1,M=1 and m=6,M=6 and m=8,M=13 accounted for 49.23％,12.78％,14.44％and 26.11％of the total occurrence probability of all categories,and should be a priority for protection.