Gas extraction blank zones are common safety hazards for large-long working faces. The elimination rate of the gas extraction blank zone significantly influences the production of large-long working faces. In this study, the technical principle of rapid outburst elimination technology for gas extraction blank zones in large mining faces was described. A three-dimensional numerical simulation of the pressure relief effect by water jet slotting was performed, and a field industrial test of rapid outburst elimination technology for gas extraction blank zones in working faces with large mining lengths was conducted in the No. 10 mine of China Pingmei Shenma Group. The results indicated that the method of drilling boreholes through the floor in the bed plate roadway and using high-pressure water jet slotting technology proved to be a rapid outburst elimination technology for gas extraction blank zones in large mining faces. This can provide a reference for similar projects.