Grouting of rock fractures is an effective way to reduce or prevent water inflow during rock excavation. Prediction of the grouting process can greatly optimize the corresponding grouting progress and reduce the relevant cost. The theoretical model for grout flow between parallel plates is fundamental to 1D grouting simulation. However, large discrepancies are found between recent experimental data and results from traditional theoretical model for grouting simulation. One of the main reasons for the large discrepancy could be due to the deformation of the channel plates in the experiment. Therefore, a new model considering the coupling between grout flow and deformation of fracture channel is derived, where the fracture deformation is updated during the whole grouting process. It is found out that grouting simulation considering fracture deformation can better describe the experimental data than traditional model not considering fracture deformation.

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