为了提高煤层注水的湿润半径,改善煤层注水效果,结合开滦某矿掘进工作面的实际情况,运用Fluent软件,采用多孔介质模型对煤层注水过程不同影响因素下煤层湿润半径进行数值模拟研究。结果表明:掘进工作面现有煤层注水工艺的湿润半径为1.82 m;注水压力每增加2MPa,湿润半径增加0.15 m左右;注水孔长度每增加1.5 m,湿润半径增加0.1 m左右。根据模拟结果对注水工艺进行优化后,煤层的含水率平均提高1.39%,平均降尘率也可达到21%左右。 In order to increase the wetting radius of coal seam water injection and improve the water injection effect of coal seam, the paper uses Fluent software to simulate the wetting radius of coal seam under different influence factors of coal seam water flooding by using porous media model. The results show that the wetting radius of existing water injection technology is 1.82 m. The water vapor pressure increases by about 0.15 m for every 2 MPa increase of water injection pressure. For every 1.5 m increase of water injection hole length, the wetting radius increases about 0.1 m. According to the simulation results of the water injection process optimization, the average water content of coal seam increased 1.39%, the average dust reduction rate can reach about 21%.