基于ANSYS Fluent的离层注浆浆液运移扩散规律研究OA

This study investigates the slurry migration and diffusion,compaction bleeding,and subsequent seepage behavior of the exuded water in overburden isolation grouting technology.The aim is to provide a theoretical basis for grouting-induced subsidence reduction and underground safety,and to address the challenges of green mining under buildings,railways,and water bodies as well as collaborative solid waste disposal.Based on the ANSYS Fluent platform,a two-dimensional numerical model incorporating porous media characteristics is developed to simulate the entire process of compaction bleeding of high-concentration fly ash slurry within a bed separation and the subsequent seepage of exuded water into surrounding rock strata.The seepage depth of exuded water increases nonlinearly with time,rapid in the early stage and slower later,following an exponential function.The predicted ultimate seepage depth is approximately 31.1 m.In the early stage,capillary suction of the dry rock strata drives rapid downward seepage;in the later stage,as rock saturation increases,suction weakens and resistance rises,leading to a decreasing seepage velocity that gradually approaches equilibrium.The peak slurry migration velocity of 0.035 m/s occurs approximately 3 hours after injection.This study applies the CFD method to quantify key parameters of slurry migration,revealing the spatiotemporal evolution of water transport and its physical mechanisms,thereby providing theoretical support and a numerical tool for optimizing grouting engineering design,predicting slurry diffusion extents,and controlling water inflow risks on working faces.