煤矿安全2024，Vol.55Issue(1)：78-85,8.DOI:10.13347/j.cnki.mkaq.20221796
基于UDF的煤层注水渗流演化规律的数值模拟研究
Numerical simulation study on seepage evolution law of coal seam water injection based on UDF
摘要
Abstract
In order to reveal the seepage evolution law of high-pressure water injection and improve the effect of water injection and dust suppression in coal,based on triaxial compression and coal mining practices,this paper obtains the matching relationship between coal deformation and pore water pressure through coal-rock permeability test.The user-defined function module is used to compile the relationship into Fluent to simulate the fluid pressure field,velocity field and water distribution in the process of drilling water injection,and analyze the wetting range and seepage velocity in coal around the radial direction of drilling hole under different water injection pressures.The results show that the seepage field pressure increases with the increase of pore water pressure,and the rate of pressure change gradually decreases with the increase of time,and the variation of seepage field velocity shows a similar change law.With the continuous increase of pore water pressure,the porosity of coal increases,and the water content of coal in-creases gradually,and the distribution range is gradually expanded from around the borehole to both sides.The wetting process around the borehole of coal seam increases rapidly and then decreases slowly to reach a stable state.关键词
煤层注水/数值模拟/UDF/孔隙率/渗流/润湿分布Key words
coal seam water injection/numerical simulation/UDF/porosity/seepage/wetting distribution分类
矿业与冶金引用本文复制引用
葛俊岭,王彦敏,刘涛..基于UDF的煤层注水渗流演化规律的数值模拟研究[J].煤矿安全,2024,55(1):78-85,8.基金项目
重庆市自然科学基金面上资助项目(cstc2021jcyj-msxmX1184) （cstc2021jcyj-msxmX1184）
