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Aiming at the problems of buried tube nitrogen injection that the nitrogen injection spot with intervals in the space causes the failure of continuous nitrogen distribution in goaf, leading to poor inert effect. In addition, the unrecycling of the nitrogen injection pipe causes great resources waste. Based on the principle that the shear capacity of the mining nitrogen injection pipe is superior to its tensile strength, new fire nitrogen injection process (rotating traction and non-interval) was designed, fundamentally solving major defects of buried pipe nitrogen injection, which can realize the synchronous movement between nitrogen injection point and the workface. According to the relevant principles of planar problems in elastic mechanics, the calculation method about dynamic parameter of non-interval nitrogen injection process for fire control was put forward. By using a geotechnical engineering numerical simulation software, the stress distribution of the nitrogen injection pipe in the goaf of Yanzishan Mine was simulated, and the traction power was computed based on it. [ABSTRACT FROM AUTHOR]