抽采条件下综放采空区漏风流场数值模拟

Numerical simulation of leak flow field of mined-out area of the fully-mechanized sublevel caving in the extraction conditions

通过现场实测抽采条件下综放采空区瓦斯浓度、氧气浓度、工作面压力、采空区遗煤耗氧速度、采空区遗煤瓦斯释放速度、瓦斯抽采量。假定综放采空区为各项同性的多孔介质,建立综放采空区漏风流场数学模型。本文使用了ANSYS软件和FLUENT软件,其中ANSYES软件是先用DesignModeler进行三维建模(针对采空区),之后对综放采空区有关参数进行说明,这里运用的是UDF用户自定义函数。采用FLUENT软件(ANSYS环境下)对抽采条件下综放采空区漏风流场进行数值模拟,得出了抽采条件下综放采空区漏风流场规律。

Obtaining gas density, Oxygen concentration, face pressure, oxygen speed of residual coal in goal, gas release rate of residual coal in goal, and gas extraction volume of mined- out area of the fully-mechanized sublevel caving in the extraction conditions through the actual measurement on the scene. On the assumption that the fully mechanized top-coal caving for same sex of porous media, establishing mathematical model of leak flow field in mined-out area of the fully-mechanized sublevel caving. First of all, using DesignModeler that belongs to ANSYS software to set up three-dimensional model of coal goal. Aiming at extraction conditions on the fully mechanized, related parameters are defined by UDF user- defined functions. In the next place, for extraction conditions on the fully mechanized, adopting FLUENT software （under the condition of ANSYS） to conduct numerical simulation and making a conclusion about leak flow field law.