With the rapid development of deep underground engineering, grouting technology is widely used to enhance the stability of the surrounding rocks in tunnels, where ingress water, large site disturbance, and deformation are the main challenges. In this paper, a three-dimensional (3D) numerical grouting system, which is based on TOUGH2 and the finite element method (FEM), is developed to study the diffusion and consolidation of grout slurry during the cyclic grouting process. It is observed that the grouting technology can reduce the rock permeability and porosity, increase the degree of compactness, and improve the strength of the rock mass. This numerical grouting system is validated by three numerical tests. The grout diffusion and consolidation process are investigated by simulating grouting experiments. Finally, a detailed mining tunnel grouting schedule is designed, and the corresponding numerical model is established to mimic stopping the water ingress. The results show that the grouting system presented in this study is potentially useful to improve the grout characteristics and tunnel designs, as well as construction.

随着深层地下工程的迅速发展，灌浆技术被广泛用于增强隧道围岩的稳定性，而隧道的围岩是进水，大场地扰动和变形的主要挑战。本文研究了一种基于TOUGH2和有限元方法（FEM）的三维（3D）数值灌浆系统，以研究灌浆在循环灌浆过程中的扩散和固结。可以看出，注浆技术可以降低岩石的渗透率和孔隙率，增加压实度，并提高岩体的强度。该数值灌浆系统通过三个数值测试验证。通过模拟灌浆实验研究了灌浆的扩散和固结过程。最后，设计了详细的矿山巷道注浆进度表，并建立了相应的数值模型，以模拟进水停止过程。结果表明，本研究中提出的灌浆系统对于改善灌浆特性，隧道设计以及施工具有潜在的实用性。