Numerical simulation of limestone rock mass blasting was carried out using the two-dimensional particle flow code (PFC2D) within the discrete element modeling framework, and the explosion load was loaded using the particle expansion algorithm. A field experiment of rock blasting was also carried out from which the size of the blasting funnel and the maximum blasting vibration velocity were recorded. The simulation results were compared with the experimental results in two aspects: the blasting result and the post-explosion effect. From the comparison, it has been observed that the size of the blasting funnel obtained from the numerical simulation shows a good agreement with the field experiment. However, in the case of the post-explosion effect (the blasting vibration velocity), the results of the numerical simulation and the vibration velocity curve obtained from the field test show disagreement to a certain extent. This demonstrates that the particle expansion loading algorithm is reliable in simulating the rock blasting process. The results of this research serve as a reference for subsequent applications of the PFC method in the field of rock blasting.

在离散元建模框架内，使用二维粒子流代码（PFC2D）对石灰石岩体爆破进行了数值模拟，并使用粒子展开算法加载了爆炸载荷。还进行了现场爆破实验，记录了爆破漏斗的大小和最大爆破振动速度。从爆破效果和爆炸后效果两个方面将仿真结果与实验结果进行了比较。从比较中可以看出，由数值模拟获得的喷砂漏斗的尺寸与现场试验显示出良好的一致性。但是，在爆炸后的效果（爆破振动速度）的情况下，现场试验得到的数值模拟结果和振动速度曲线在一定程度上存在分歧。这表明粒子膨胀加载算法在模拟爆破过程中是可靠的。研究结果为PFC方法在爆破领域的后续应用提供了参考。