Emergency rescue method based on disaster area environment of gas explosion in underground coal mines

In order to resolve the key problems of emergency decision making, command and site disposal, and avoid the occurrence of mine rescue teams’ casualties, combining with the survey data from mine rescue teams, the formation mechanism of disaster area environment in underground coal mine gas explosion accidents was studied based on the explosion mechanics and the fluid mechanics. And the changing rule of disaster area environment and emergency rescue method were analyzed for gas explosions happened in the typical locations which were coal face, heading face and roadway. The results show that the disaster area environment has important relationship with explosion intensity, space size of explosion location, gas emission quantity, facilities and rescue measures. The formation of disaster environment can be divided into 3 stages which are the destruction of explosion shock wave and flame front, the redistribution of heat and harmful gas, and the disturbance of rescue measures. Furthermore, in line with the changing rule of disaster area environment, we propose an emergency rescue method that takes targeted measures to improve the disaster environment gradually for safety rescue on the basis of making a strict assessment of disaster area environment. And preventing the rescuers’ casualties should be focused on during the disturbance of the rescue measures.