In this work, comprehensive numerical modelling was conducted on the full-scale linear cutting test with a TBM disc cutter. Several numerical techniques, including local particle refinement and the coupling of different numerical methods (4D-LSM, DDA, and NMM), were adopted to more realistically reproduce the actual experimental loading conditions. The coupled numerical method was first calibrated against the normal cutting force of the normal linear cutting test with large blocks of granite. Following the calibration, numerical predictions of the inclined cutting and double-channel continuous cutting processes were conducted, and the numerical results showed good agreement with previous experimental observations. The influences of cutting speed, particle size, and multiscale coupling techniques were further discussed, and some suggestions were derived on the selection of proper numerical parameters and techniques in the numerical simulation of 3D large-scale TBM disc cutting lab tests.

在这项工作中，使用TBM盘式切割机对满量程线性切割测试进行了全面的数值建模。采用了多种数值技术，包括局部粒子细化和不同数值方法的耦合（4D-LSM，DDA和NMM），以更真实地再现实际的实验加载条件。首先用大块花岗岩对普通线性切削试验的正常切削力校准耦合数值方法。校准后，对倾斜切削和双通道连续切削过程进行了数值预测，数值结果与以前的实验观察结果吻合良好。进一步讨论了切削速度，粒度和多尺度耦合技术的影响，