中文摘要：

基于综放遗煤自燃防治对煤矿安全生产的重要性，利用Fluent软件对注氮防治综放遗煤自燃进行了三维数值模拟研究。以九道岭矿E1S6综放面为例，对其采空区遗煤自燃规律进行了三维数值模拟研究，依据研究结果对注氮防治措施的相关参数进行了确定。最后依据模拟分析结果，对所确定的注氮防治措施进行了实际应用，并取得了成功。结果表明：采空区注氮量与氧化带宽度成负指数函数关系，与影响高度成正比关系；采空区注氮量在30~35 m 3 /min时能够满足E1S6综放面遗煤自燃防治的要求。

英文摘要：

The paper aims to introduce the author＇s work on the way to prevent from the residual coal spontaneous combustion in the case of fully mechanized caving pit mining. We have established the given model with the help of a software named as the Fluent by taking the E1S6 working face of Jiudaoling Mine in Liaoning as a case study sample. At the beginning of our study, we have explored the oxygen concentration field, the gas concentration field and the temperature field of the residual coal spontaneous combustion via the 3D numerical simulation. From the investigation and exploration, we have got to know that the maximum width of the oxidation zone was about 40 m in a sphere of about 6 m from the maximum width of oxidation zone to the air way, in a distance of about 1-2 m from the position of higher temperature to the coal floor. And, then, we have chosen the criterion for estimating the effectiveness of the nitrogen injection for preventing the residual coal spontaneous combustion according to the simulation results, the velocity of the working face and the void ratio of the goaf. The criteria we have chosen include： （1） the width of the oxidation zone, which is less than 28.8 m; （2） the influence height of nitrogen injection, which is about 9-10 m. And, next, we have determined the initial values of the parameters for nitrogen injection based on the experience and the related calculation. And, then, we have decided the volume of nitrogen to be injected into the goaf, which is equal to about 20 m 3 /min. The injection is supposed to begin 30 m away from the entrance of the pipeline for nitrogen injection to the working face. However, the results of the simulation analysis reveal that, the residual coal spontaneous combustion taking place in the E1S6 working face would be unavoidable in case when the volume of nitrogen tends to reach 20 m 3 /min. And, based on the results of numerical simulation and the criterion, we have finally ascertained that the volume of nitrogen that is likely to lead to the coal se