大采高综放工作面采空区自然发火“三带”分析研究

Analysis on Spontaneous Combustion in Three Belts in Goaf of Fully Mechanized Caving Face with Large Mining Height

通过采空区预埋管路,进行气体抽样和分析等,掌握采空区气体浓度随工作面推进的变化情况,将所测数据用ORIGIN软件作出折线图并进行拟合分析,利用ANSYS前处理软件GAMBIT进行建模、网格划分、边界条件设置后得出模型,导入流体力学计算软件FLUENT进行计算,得出采空区底板氧气浓度分布云图进行验证,分析出采空区自然发火"三带"分布规律。

To understand the change of the gas concentration in the goaf with the work face progressing, gas sampling and analyzing are doing with the pre-buried pipelines in the goaf. The software of ORIGIN is used to make a line chart with measured data for fitness analysis, during which pre-processing ANSYS of GAMBIT are introduced for modeling, meshing and boundary setting, together with the fluid mechanics calculation software FLUENT, finally the oxygen concentration distribution cloud map in the goaf floor are obtained for further verification, so the distribution law for Spontaneous combustion in goaf of three belts is shown clearly.