And by analyzing the evaluation rule of FAI in the process of excavation, we can forecast the variation of extent and depth of the excavation disturbed zone, damage zone and failure zone in the process of excavation.

• 通过多个算例的应用分析表明,利用围岩中的破坏接近度分布场,可给出围岩塑性区的范围,应力集中程度的分区,可合理地表达复杂应力状态下单元的应力危险性,还可以描述开挖损伤区内围岩的损伤程度,使得应力危险性和应变损伤程度的定量评价简单易行。