Coal seam gas extraction method capable of realizing drilling and cutting integration and oscillation and heat injection cooperative reinforcement

The invention discloses a coal seam gas extraction method capable of realizing drilling and cutting integration and oscillation and heat injection cooperative reinforcement and is applicable to gas control in coal seam areas with micro pores, low permeability and high adsorption performance. A plurality of seams and slots are formed in a heat injection extraction hole with a drilling and cutting integration technique, high-pressure steam with the temperature changed periodically is injected into the heat injection extraction hole through a steam generator, and forms super-heated oscillation steam through a self-rotation type oscillation impulse jetting spray head to impact and heat a coal body. The method breaks through the limitation of a single permeability increase technique, the pressure relief range of the single hole is increased significantly by the aid of hydraulic cutting, a fracture network is formed, and flowing channels are provided for the super-heated steam; extension and penetration of fractures of the coal body are promoted by the aid of the oscillating and changing steam temperature and pressure, the gas desorption efficiency is significantly improved, and the high-efficient extraction of gas is realized.