Abstract: In order to solve the problem of float coal spontaneous combustion during lower mining in overlying old empty goaf of close extra thick coal seam with high gassy and easy spontaneous combustion, taking Yangcun Mine headspace extraction working face as the research object, through risk analysis of goaf spontaneous combustion and the study on fire prevention and control technique, the risk characteristics of goaf were identified, and a series of comprehensive measures about prevention and control technology were proposed, such as optimizing the release position of injection nitrogen in goaf, establishing goaf interlayer coordination pressure-sharing of air leakage control technology, and applying multi-point pre-buried grouting fire prevention technology in overlying goaf area. Through the test results, the comprehensive technology can effectively solve the problem of goaf spontaneous combustion during mining the Yangcun mine 23 coal seam by headspace extraction.