Abstract: A case study on evacuation time check in a permanent refuge chamber of domestic mine was presented. According to the site of permanent refuge chamber, learning from the subway emergency evacuation principles, underground personnel can safely evacuate when safety evacuation time is less than available safe evacuation time. Taking underground tunnel as the basis of evacuation network model, based on assumptions of evacuation process, safety evacuation time can be calculated for evacuating from the farthest distance working face to the refuge chamber. The result shows that roadway capacity is far greater than the refuge chamber entrance capacity, which causes bottleneck phenomenon and personnel retention. It also shows that safety evacuation time is less than the available safe evacuation time, so all the staff in underground can reach the permanent refuge chamber in time.