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井下突变发生后（如火灾、瓦斯爆炸、有毒有害气体溢出等）井下工作人员须在最快时间撤离到安全区域。运用通风网络图的两个子图，一个是被污染图，一个是安全区域图，以图论为指导，找出从污染图进入安全图中的最短路径，这就是避灾路线。本文介绍了避灾路线的图像显示，以及在铁法晓明矿的实施应用。
Downhole mutants (such as fires, gas explosions, toxic and harmful gas spills, etc.) underground workers to be evacuated to the safe area as soon as possible. Using the two subgraphs of the ventilation network diagram, one is the pollution map and the other is the safety area map. Using the graph theory as the guide, the shortest path from the pollution map to the safety map is found, which is the disaster prevention route. This article introduces the image display of the disaster avoidance route and the application of the mine in Xiaofei Mine.