Analysis and Research on Experimental Process of Water Thermal Migration of Freeze–Thaw Cracked Rock Based on Particle Tracking Method and Thermal Imaging Technology

In high-altitude and cold regions, external dynamic geological processes, such as glacial melting other processes are intense, which frequently results in surface slope collapse, landslides, debris flows, ice avalanches along the route. For high steep slopes regions containing controlled fractures, key is to grasp water-heat process evolution of frost heaving force induced by it within fractures. This can then lead exploration multi-phase multi-field damage propagation, a disaster mechanism fractures under repeated freezing thawing. The visual tracking migration fractured rock mass helpful observing frost-heaving providing theoretical basis for mechanism. First, research on particle tracking, thermal imaging tests, image processing technology was conducted demonstrate that techniques track front liquid water inside rock. Then, selecting fluorescent particles improving observation window using waterproof insulation cardboard, development visualization device system achieved, allowing process. verification test showed thawing conditions, experimental could effectively temporal spatial changes outside monitor real-time front. Reliable were obtained, provided record water-ice phase transition during Combining with recording motion rate particles, this experiment described movement speed convection free migration, significant importance study influence migration.