Abstract: In order to solve the gas accident problem caused by the electric power shut off and the ventilation stopped in the mine roadway heading face, a complet ed new design plan of the emergency ventilation supply system was provided when the electric power of the mine roadway heading face was shut off. Based on the circ umstances, a high power flameproof emergency electric power was researched and developed.With a non-destructive balance charging method of the power, a new min e short working system flameproof inverter could be applied to make the battery group have high volume, high efficiency and other advantages after charged and meet a normal operation over 60 minutes for 30 kW ventilator.The emergency power could be suitable for the major mine roadway heading faces in China.