【摘要】 为了解决沉积泥质砂岩的煤型铀矿顶板因含水率高,支护困难及传统的疏水方法效率较低的问题,在实验室环境下设计了一种砂箱及内部花管来模拟其内部流场的特性。通过建立模型并基于Fluent软件Biot固结理论流固耦合模型,来模拟分析疏水花管的直径和长度、负压以及疏水花管上小孔的分布形式对平均含水率的影响,并采用正交试验进行验证。数值模拟及实验结果表明:疏水花管的直径为20mm,长度为500mm,负压为-0.078MPa,小孔垂直间距的三段尺寸分别为60mm、30mm、15mm,是其最优疏水工艺参数,研究结果为强化疏干机关键部件的优化提供了理论依据。更多还原

【Abstract】 Due to high moisture content,there exists the supporting difficulty and low efficiency of traditional hydrophobic methods for the coal roof of the argillaceous sandstone type uranium deposits.To solve the problem,a sand box in a lab environment and internal tube is designed to simulate the internal flow field characteristics. Model is built to simulate the average moisture content under the influence of the thin spray pipe diameter and length,the negative pressure,and distributions of hydrophobic spray tube holes based on Biot consolidation theory of fluid-solid coupling model of Fluent software,and the analysis data are verified by orthogonal experiment. Numerical simulation and experimental results show that the hydrophobic spray pipe diameter is 20 mm,length is 500 mm,pressure is 0.078 MPa,the vertical distance between holes of three dimension is 15 mm,30 mm,60 mm,respectively is the optimal hydrophobic process parameters. The results for provides theory basis for the optimization of the key components to improve drainage machine.更多还原