High-energy laser technology is expected to be applied into deep drilling and tunnel excavation due to its attractive prospects for enhanced hard rock breakage. However, there is still a lack of proper experimental methods and numerical tools to quantitatively evaluate the influence of laser radiation on rock fracture. Combined with our specially designed experimental tests, this work aims to provide a numerical tool to quantitatively investigate laser-induced rock damage. Using a specially designed experimental platform, we conducted direct tensile tests on rock samples in the shape of dog-bone to determine rock damage under the laser radiation of different parameters. The experimental results show that a high-energy laser beam can cause a significant loss in rock tensile strength. Then, a mathematical model was established to describe the temporal and spatial evolution of rock damage in a given path of laser scanning, which was implemented in a four-dimensional lattice spring model (4D-LSM) to simulate our experimental tests. Through a comparison between the numerical and experimental results, the multiparameter damage model was proven to be more suitable for the numerical simulation of laser-induced rock damage. Finally, by introducing a laser damage model, an orthogonal experimental design was used to analyse the influencing significance of different factors on the efficiency of rock breaking and the wear of cutter tools in laser-assisted rock cutting, showing the prospects for application of the proposed numerical model to laser-assisted tunnel boring machine (TBM) tunnelling in the future.

由于高能量激光技术具有增强硬岩破损的诱人前景，因此有望在深层钻探和隧道开挖中应用。但是，仍然缺乏适当的实验方法和数值工具来定量评估激光辐射对岩石破裂的影响。结合我们专门设计的实验测试，这项工作旨在提供一种定量研究激光引起的岩石损伤的数值工具。使用专门设计的实验平台，我们对狗骨头形的岩石样品进行了直接拉伸测试，以确定在不同参数的激光辐射下的岩石损伤。实验结果表明，高能激光束会导致岩石抗拉强度的显着降低。然后，建立了一个数学模型来描述在给定的激光扫描路径下岩石损伤的时空演化，并在四维晶格弹簧模型（4D-LSM）中实现了该模型以模拟我们的实验测试。通过数值和实验结果的比较，证明多参数损伤模型更适合于激光诱导岩石损伤的数值模拟。最后，通过引入激光损伤模型，采用正交试验设计，分析了不同因素对激光辅助岩石切割中破碎效率和刀具磨损的影响意义，显示了该方法的应用前景。未来的激光辅助隧道掘进机（TBM）掘进的数值模型。