Abstract: In order to explore diffusion properties and pressure field distribution of inorganic solidified foam slurry in air leakage fracture, the force and flow analysis of inorganic solidified foam slurry in air leakage fracture was carried out based on its time-varying model of viscosity. The mechanical and flow characteristics of inorganic solidified slurry in air leakage fissures were studied, and the characteristics of diffusion and pressure field distribution under constant air volume and leakage airflow were discussed. A theoretical model of adverse wind flow and diffusion of inorganic solidified foam slurry in horizontal air leakage single crack was established, and a numerical model for horizontal crack diffusion with constant leakage rate was set up. The rationalities of theoretical and numerical models were verified by comparison. The results show that under the constant flow grouting condition, prolonging the grouting time will greatly increase the grouting pressure, but the increase in the diffusion distance of inorganic solidified foam slurry against the wind tends to stop, and that under the condition of air leakage, the grouting pressure should be preset according to the grouting project and influence parameters of air leakage should be set at the same time.

Key words: inorganic solidified foam, crack grouting, time-varying viscosity, upwind diffusion, numerical simulation