This study analyzed the performance of the Riedel-Hiermaier-Thoma (RHT) model and the Holmquist-Johnson-Cook (HJC) model in the numerical simulations of blast-induced cracks in granite. The two models implemented in the LS-DYNA software were firstly adopted to simulate a single blasting process in granite. Further, the HJC model was improved by coupling an additional failure criterion and used to describe the tensile damage of rock materials. The feasibility of the two models in simulating the extent of damage zone and fracture patterns in rock mass under cyclic blast loading was explored based on the field blast tests. The results show that both the RHT model and the improved HJC model are able to describe the formation of crushed zone and the propagation of tensile cracks in single blasting problems. For cyclic blasting problems, the simulation results based on the RHT model are consistent with experimental ones, but the improved HJC model is not applicable. Both the RHT and the improved HJC models are suitable for the numerical simulation of single blasting problems and the RHT model should be the first choice for the simulation of cyclic blasting problems.

这项研究分析了Riedel-Hiermaier-Thoma（RHT）模型和Holmquist-Johnson-Cook（HJC）模型在花岗岩爆炸诱发裂纹的数值模拟中的性能。首先采用LS-DYNA软件中实现的两个模型来模拟花岗岩中的单个喷砂过程。此外，通过耦合附加的破坏准则改进了HJC模型，并用于描述岩石材料的拉伸损伤。基于现场爆破试验，探讨了两种模型在模拟循环爆破荷载作用下岩体破坏区和裂隙模式范围方面的可行性。结果表明，RHT模型和改进的HJC模型都能够描述单次爆破问题中破碎区的形成和拉伸裂纹的扩展。对于周期性爆破问题，基于RHT模型的仿真结果与实验结果吻合，但改进的HJC模型不适用。RHT模型和改进的HJC模型都适合于单次爆破问题的数值模拟，RHT模型应该是循环爆破问题模拟的首选。