Abstract: During the recovery period in 12315 working face of lower coal seam in extremely close coal seam groups of Huojitu Coal Mine, due to the slow advancing speed and air leakage in the gob area, the high temperature phenomenon occurs in the area. By isotopic radon and infrared temperature detection technology and thermocouple temperature measurement, we determine that the specific high temperature abnormal areas are in connection roadways between 79 and 81 crossheadings and between 67 and 69 crossheadings of 12315 working face, and analyze the reasons for the high temperature region. In order to control the high temperature area within the shortest time, taking measures of adjusting the ventilation system, compacting back filling, ground drilling grouting, and joint governance measures of grouting, nitrogen and three-phase foam injection in sealed measure holes in mined area, all these effectively control the high temperature in gob area of 12315 working face in two months and achieve good benefits and ensure the safe production of 12315 working face.