Investigation of grouting diffusion in a single rock fracture considering the influences of obstructions

Grouting reinforcement was used to improve rock strength and avoid seepage in engineering. A self-developed visualised test platform developed the influences of different fracture openness on grouting diffusion modes were revealed; Bingham rheological model imported simulate process a single plate fracture, spatiotemporal distribution velocity field under obstructions determined using finite element method. The results indicate that (i) grout diffuses faster with increase openness, while stagnation effect behind obstruction occurs. (ii) Due obstructions, can be divided into four stages: circular diffusion, flat vortex butterfly diffusion. (iii) area is fully reinforced zone semi-reinforced zone, latter increases being little affected by size any obstruction. (iv) Furthermore, some new laws revealed considering asymmetrical arrangement obstructions. presented this work will helpful for describing predicting networks.