Study on Fluid–Solid Characteristics of Grouting Filling Similar-Simulation Materials

The mining-induced overburden bed separation grouting technique can control surface subsidence through the high-pressure and filling into during mining. physical simulation method be used to objectively reproduce dynamic migration process of slurry in but traditional similar-simulation materials are not suitable for grouting. Considering water disintegration, weak storage capacity, poor permeability materials, existing were modified this study. improved have adjustable mechanical parameters, stable properties a water-filled environment, high permeability, reasonable ratio was determined hard rock, medium-hard soft rock. similarity function deduced time coefficient obtained judge applicability with specific proportions. This study provides reliable experimental scheme theoretical basis improvement fluid–solid characteristics.