Pre-control Technology of Coal Seam Spontaneous Combustion at Goaf Crossheading Roof in Half Isolated Island Fully Mechanized Caving Face

For the special reality of much residual coal, serious air leakage and the dangerous possibility of coal seam spontaneous combustion of the crossheading roof in side-impending goaf of half isolated island fully mechanized caving face, the reasons of coal seam spontaneous combustion of crossheading roof were analyzed. Then according to the practical situation of 3-105 working face, the pre-control technology of the coal seam spontaneous combustion of the crossheading roof in side-impending goaf including the forecast technology of spontaneous combustion, plugging-wind technology and pressure injection of fire prevention material was put forward, which effectively prevented the accidents of coal spontaneous combustion in side-impending goaf of 3-105 half isolated island fully mechanized caving face.