摘要
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 improve the wetting radius and effect of coal seam water injection,based on the actual situation of a mine driving face of kailuan Group,we simulate the wetting radius under different influcing factors during the water injection process by Fluent software and porous medium model. The results show that wetting radius is 1. 82 m under the existing conditions of coal seam injection;wetting radius increases about 0. 15 m when the injection pressure increases 2 MPa; wetting radius increases about 0. 1 m when the injection length increases 1. 5 m. The moisture content of coal seam increases 1. 39% and dust concentration decreases 21% on average after optimizing the injection process according to the result of simulation. So we can increase injection effect to reduce the dust concentration of driving face by increasing the injection pressure and hole length.
出处
《煤矿安全》
CAS
北大核心
2017年第1期28-31,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51274024
51574016)
关键词
掘进工作面
煤层注水
粉尘治理
湿润半径
数值模拟
driving face
coal seam water injection
dust control
wetting radius
numerical simulation
