Coal mine goaf spontaneous combustion prevention and control system based on CO2 hydrate and using method thereof

The invention belongs to the technical field of coal mine fire prevention and control, and provides a coal mine goaf spontaneous combustion prevention and control system based on CO2 hydrate. The device comprises a CO2 hydrate, an internal rubber shell, a first air outlet, a first adjustable steel needle, a solid stopping agent, a first flow guide pipe, a backflow prevention baffle, a second air outlet, a second adjustable steel needle, a second flow guide pipe, a piston, an injection hole and an injection pipe. The invention further provides a using method of the spontaneous combustion prevention and control system for the coal mine goaf. According to the spontaneous combustion prevention and control system, the upper surface and the lower surface of the residual coal are wrapped by the inhibition liquid, the released CO2 gas enables the oxygen content in the goaf to be greatly reduced, and by means of the staged multiple spontaneous combustion prevention fire extinguishing mode, spontaneous combustion of th