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To provide a safer evacuation route for underground workers, an emergency evacuation framework for smoke environments of mine fires was constructed, in which the mine disaster ventilation simulation system (TF1M3D) was independently designed. A ventilation system topology model for the entire mine was established. During normal ventilation periods, the ventilation resistance obtained through TF1M3D simulation was compared with the on-site measured values. The error is within the acceptable range for engineering practice, indicating that the model is reliable. Based on information entropy theory, a model of CO accumulation hazard was proposed with stability of ventilation system. A comprehensive safety assessment model for the joint evacuation of humans and fire smoke in the ventilation system was then established. The objective function of this model is to maximize the evacuation efficiency and minimize the information entropy of CO accumulation along the evacuation route. Using Pearson correlation analysis and two-tailed test, it is concluded that the comprehensive evaluation value has a linear relationship with the dimensionless distance, and this relationship is significant at the 0.01 level. Therefore, the model is reliable and can be used to determine the optimal evacuation mode for fire in coal mine.
Si et al. (Fri,) studied this question.