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铁法矿区8个生产矿井中,大兴矿、晓南矿、大隆矿实验煤样自燃倾向性鉴定结果均为Ⅰ类容易自燃,其他矿井为Ⅱ类自燃,开采过程中的自然发火问题较为突出。按照“基础规律研究—预测预报方法确定—防治技术体系建立”的技术路线,形成了具有铁法矿区特色的注氮与注砂堵漏紧密结合的综合防治技术体系。
Among the 8 production mines in Tiefa Mining Area, the spontaneous combustion propensity of the experimental coal samples from Daxing Mine, Xiaonan Mine and Dalong Mine are all prone to spontaneous combustion of Category I. Spontaneous combustion of the other coal mines is Type II spontaneous combustion, and natural fire problems in the mining process are prominent . In accordance with the “basic law of research - prediction and forecasting method to determine - the establishment of prevention and control technology system,” the technical route, with the characteristics of the iron method with the injection of nitrogen injection and sand plugging integrated prevention and control technology system.