Abstract: The hedge route is the life line of the underground personnel，and is also the first step to implement effective hedge. In this paper，the impact mechanism of underground hedge is analyzed，and the prevailing quantitative indicators are established from the roadway safety and hedge efficiency. The algorithmic model of underground hedge's optimal path by introducing the equivalent weight factors of hedging efficiency based on the improved Dijkstra algorithm. It also conducts simulation by the tunnel network diagrams of underground pre-disaster and post-disaster. The experimental results show that the algorithm of optimal hedging path is more effective than the improved Dijkstra algorithm to solve path. It provides mathematical model and quantitative analysis for the selection of optimal path and the optimization design of hedge route.

Key words: Underground hedge, Optimal path, Mechanism research, Mathematical model