阳煤一矿S8401工作面采空区自燃三带数值模拟研究

Study on Numerical Simulation of Three Spontaneous Combustion Zones in Goaf of No.S8401 Coal Mining Face in Yangquan No.1 Mine

为了确定阳煤一矿S8401综放工作面采空区自燃三带分布情况,根据现场实测的采空区参数(采空区物理参数,巷道风量、风压等),利用FLUENT数值模拟软件,对采空区氧气浓度分布场和空气流动速度场分布情况进行了数值模拟;并采用“二指标法”,来划分S8401工作面采空区自燃三带,得到自燃带最大宽度为73 m。工作面最小推进速度经计算,为2.56 m/d。

In order to verify the distribution condition of the three spontaneous combustion zones in the goaf of No.S8401 coal mining face in Yangquan No.1 Mine,according to the site measured parameters(goaf physical parameters,the ventilation volume and air pressure in the gateway and others),with the application of the FLUENT numerical simulation software,the numerical simulation was conducted on distribution field of the oxygen density and the distribution condition of the air flow velocity in the goaf.The“two index method”was applied to divide the three spontaneous combustion zones in the goaf of No.S8401 coal mining face.The max obtained width of the spontaneous combustion zone was 73 m and the min advanced speed of the coal mining face was 2.56 m/day.