Abstract: The effect of nitrogen inerting in goaf is weakened under the condition of gas extraction in high suction roadway with negative pressure. In order to achieve the goal of “rational disaster management, economic disaster management”, based on the gas composition in high drainage roadway and the law of conservation of mass, a calculation criterion for measuring the matching degree of gas extraction intensity and nitrogen injection quantity in goaf is proposed, the concept of “disturbance coefficient of nitrogen injection” is proposed, and the disturbance coefficient in the range of 7% to 9% is taken as the criterion for adjusting the injection capacity of nitrogen, the formation of gas drainage under the influence of the nitrogen injection process feedback compensation. The technology has been applied to disaster recovery at the N3042 working face.