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综放工作面注氮是煤矿防灭火较关注问题之一．有关注氮规律、机理人们都从不同的角度进行着研究。本文根据平庄矿务局古山井的综放回采面，注氮防灭火成功经验及实测研究分析．论证注氮防灭火的机理，及相关参量的合理确定。
Nitrogen injection in the fully mechanized top coal caving face is one of the issues of concern in fire prevention and control of coal mines. Concerning the law of nitrogen injection, the mechanism of people from different angles for research. Based on the fully mechanized top-coal caving face of Gushanjing Mine of Pingzhuang Mining Administration, the successful experience of fire prevention and extinguishing by nitrogen injection and the actual research are analyzed. Demonstration of the mechanism of nitrogen injection and fire extinguishing, and the reasonable determination of relevant parameters.