Abstract: Based on the investigation and analysis of gas combustion accidents caused by rock impact friction sparks which leads to ignition of goaf at 121109 fully mechanized coal face of Xinji Coal Mine, we research gas prevention and control technology of strong quartz roof of large dip angle mining of coal seam, and analyze the impact friction mechanism and the hard rock roof anticline gas flow laws of geological structure. As shown in the results, the gas burning and explosion problem can be solved effectively by adopting prevention measures, such as drainage of goaf gas, roof splitting and blasting, goaf wetting, inert gas injection and so on.