Abstract: Aiming at the actual situation that the existing emergency safety evacuation system can not fully meet the demand of escape. We pointed out that some unreasonable locations for mine refuge chamber and inefficient evacuations still existed in coal mines. Multiple alternative chambers were built on routes for avoiding disaster and the shortest equivalent length was attained by the shortest path method. The main parameter of time was taken to establish an evacuation model for mine stope. Then we concluded the safety coefficient K=t_TASE/(t_R+t_A+D/V) and discussed the reasonable arrangement for chambers. It shows that the evacuation model provides effective reference for evacuation and ample time to prepare for the rescue activities.