Abstract: According to the emergency management problems of gas leakage in petrochemical enterprises, the classical Gauss model of gas leakage and diffusion is analyzed. Combined with the advantages and disadvantages of the instantaneous model and the continuous diffusion model in the classical model, an improved dynamic continuous puff integral gas diffusion model is proposed to realize the dynamic visualization display of leakage and diffusion based on GIS. Combined with the weighted shortest path priority algorithm, the dynamic evaluation model of multi-objective and multi-task gas leakage emergency process is constructed, which realizes the assistant decision-making functions such as rapid dispatch of emergency materials and emergency evacuation guidance under accident conditions. The system provides an effective assistant decision-making basis for emergency command and management under sudden gas leakage accidents.

Key words:  , gas leakage, dynamic simulation, puff integral model, emergency decision-making, emergency management