Evidence-based Comprehensive Risk Prevention And Control System And Its Integrated Realization

In recent years,China has made remarkable achievements in economic and social development.However,the workplace safety situation is still severe and complicated.Workplace accidents occur frequently in the mining and metallurgy industry,with serious consequences.Therefore,the characterization and reduction of risks have become key issues in the mining and metallurgy industry.Based on the above background,the following studies have carried out in this article:(1)Study on identification and characterization of hazards.Through the collection and analysis of accident cases and safety standards,172 types of hazards are identified for 5 types of accidents in tailings storage facility and 115 types of hazards are identified for 4 types of accidents in molten metal operations for accident modes and life cycle stages or work sections.By defining and analyzing 10 entity concepts such as "armed hazard" and "dormant hazard",as well as 9 topological relationships such as "develop" and "from",the ontology model of hazard graph is constructed,and the hazard graph of tailings storage facility and molten metal operation is put forward.Based on algorithms such as centrality analysis and community detection,the structural characteristics of the hazard graph are analyzed,and relevant hazards and accident laws are obtained in terms of importance and relevance.(2)Study on 3D analysis and characterization of risk.Based on energy transfer theory,risk characteristics including likelihood,event magnitude and exposure are proposed.Based on the accident case analysis,risk analysis is carried out from 3 aspects of likelihood,event magnitude and exposure,and a model of influencing factors is proposed for 5 types of accidents in tailings storage facility and 4 types of accidents in molten metal operations.Combining the Analytic hierarchy process and the Euclidean distance method to improve the DS evidence theory,the risk evaluation models such as AHP-DS evidence theory and ED-DS evidence theory are proposed.Based on the 3D risk matrix,a risk classification standard including 4 levels is given.2 objects of a tailings storage facility and a 4#converter section of a steel smelting enterprise are selected to apply the method,which proved the availability and effectiveness of the method.(3)Study on comprehensive risk prevention and control system.107 types of safety barriers are identified for 5 types of accidents in tailings storage facility and 140 types of safety barriers are identified for 4 types of accidents in molten metal operations by evidence-based method,and a multi-level risk reduction system is constructed.Based on the function,means and mode of safety barriers,a safety barrier classification framework is proposed.The safety barrier performance is evaluated and analyzed quantitatively from the 4 aspects of effectiveness,availability,response time and economic cost,and the safety barrier performance evaluation grades including 4 levels are given.The method is applied to a tailings storage facility and a 4#converter section of a steel smelting enterprise as objects,and the availability and effectiveness of the method are proved.(4)Research and development of visualization system for risk characterization and reduction.Taking molten metal operations as the research object,the system is designed from the aspects of architecture,function and framework process.Using 3ds Max and 3D laser scanning and other modeling methods to model the equipment alone,integrate the 3D static scene of molten metal operations.Unity3d and C#programming language are used to realize system functions such as risk characterization,accident rehearsal,risk reduction,and safety training.The system is tested and optimized from the aspects of system function and user experience,which solves the problems of static model distortion and poor dynamic effect in the system,and improves the accuracy,authenticity and ease of use of the system.In summary,this study proposes a complete methodology system related to hazard and risk characterization,risk reduction and its visualization.The methodology system can effectively solve some problems in risk measurement,preparation,and response.It can be of significance for improving the safety management and informatization level of industrial enterprises.