西安科技大学学报2025，Vol.45Issue(2)：263-274,12.DOI:10.13800/j.cnki.xakjdxxb.2025.0205
采空区多孔介质中气化灰渣凝胶渗流特性研究
Study on the seepage characteristics of gasification ash slag gel in porous media of goaf
摘要
Abstract
In order to explore the feasibility of applying gasification ash slag gel to the goaf,a grouting test was carried out by using a self-built visual three-dimensional grouting simulation test system.The seepage behavior of gasification ash slag gel in porous media was studied,the rheological laws of gasifi-cation ash slag gel with different water-cement ratios were analyzed,the constitutive equation of slurry flow was established,and numerical simulation was conducted by using Ansys to intuitively analyze the seepage characteristics of the slurry.The results show that the gasification ash slag gel slurry exhibits obvious three-stage characteristics during seepage,including the free seepage stage,the void channel seepage stage and the resistance mutation seepage stage.During this process,the seepage velocity shows a downward fluctuating trend.As the grouting volume increases,the increase in the seepage radi-us of the slurry gradually decreases.Increasing the grouting pressure can promote the connection effect of the slurry in the porous media space,thus accelerating the seepage velocity and expanding the seep-age radius.When the grouting pressure increases from 0.05 MPa to 0.30 MPa,the average seepage ve-locity of the slurry increases by 7.84 L/min,and the transverse and longitudinal seepage radii increase by 71.4%and 85%respectively.The slurry seepage pattern obtained from the numerical simulation is similar to the results of the grouting test,with the maximum error not exceeding 5.89%.Overall,the study results can provide certain reference value for guiding the design of grouting projects.关键词
矿井防灭火/试验模拟/气化灰渣凝胶渗流/多孔介质Key words
mine fire prevention and extinguishing/experimental simulation/gasification ash slag gel seepage/porous media分类
矿山工程引用本文复制引用
胡俭,王航,王帅豪,操康波,毛小娃..采空区多孔介质中气化灰渣凝胶渗流特性研究[J].西安科技大学学报,2025,45(2):263-274,12.基金项目
国家自然科学基金项目(51704146) （51704146）
