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中文摘要：
为了模拟研究综放采空区遗煤自燃过程,建立综放采空区遗煤自燃的三维数值模型,并给出相关参数的确定方法。以五龙矿3123综放面为例,进行综放采空区遗煤自燃过程的三维数值模拟研究。结果表明：综放采空区模拟得到的速度场、浓度场、＂三带＂划分及遗煤升温过程,与现场情况基本相符。综放采空区氧化带形态近似为一倒＂7＂字形,综放采空区高温区域可以有多处,并且高温点位于底板以上约0.8 m处。通过模拟分析,还得到综放采空区氧化带高度及遗煤升温时间与工作面供风量近似满足指数函数关系。当供风量较小时,氧化带宽度与供风量成正比;当供风量较大时,氧化带宽度不再随供风量发生变化。
英文摘要：
In order to study residual coal spontaneous combustion process,a 3D numerical model was built for residual coal spontaneous combustion in goaf in fully mechanized caving face.Methods for determining the relevant parameters were given.Taking 3123 working face of Wulong mine in China for an example,residual coal spontaneous combustion was studied through the method of 3D numerical simulation.The results show that the wind velocity field,the oxygen and gas concentration fields,the three zones division and the heat-up process of residual coal obtained using the method of 3D numerical simulation conform basically to the results of actual measurement,that the shape of oxidation zone is similar to reversed ＂7＂,that there may be a number of high temperature zones,and that the centre position of high temperature zone is higher than the floor.According to simulation analysis,the air-volume of working face both height of oxidation zone and the heat-up time of residual coal are roughly exponential functions of air-supply to working face when the air-supply to working face is small,the oxidation zone width is directly proportional to the supply.
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