Gasification device for underground coal seam

The invention provides a gasification device for an underground coal seam, which comprises a water injection oil pipe arranged in a production well, and one end of the water injection oil pipe extends into an underground coal seam cavity and is communicated with the underground coal seam cavity; the oxygen injection oil pipe is arranged in the injection well, and one end of the oxygen injection oil pipe extends into the underground coal seam cavity and communicates with the underground coal seam cavity; wherein the area between the water injection oil pipe and the oxygen injection oil pipe in the underground coal seam cavity forms a combustion area, and the area close to the water injection oil pipe in the combustion area forms a gasification area. Based on the technical scheme, the water injection oil pipe is arranged, and one end of the water injection oil pipe extends into the underground coal seam cavity to be communicated with the underground coal seam cavity, so that a stable gasification area is formed