Abstract: For control spontaneous combustion of 8^# layer coal of fully mechanized caving face No.103,the condition of the working face is introduced.Based on the gas analysis data of fully mechanized caving face and the distribution of "Three belts" in gob,the combined fire prevention measure to two tunnels,mining suspending line and gob during mining suspending and supports withdraw is raised,which is mainly using light grease,high polymer gel and compound gel.Reinforcing ventilation system management and decreasing working face ventilation are also conducted to guarantee the safety of working face.It indicates that the combined fire prevention techniques are effective and reliable during mining suspending and supports withdraw.