1.Subclassification analysis revealed that the prolapsed discs that centralized had significantly less disc height loss (P 01).
次级分类分析表明间盘有显著的高度丧失（P0.01）。
2.Based on the subclassification, the physico-mechanical indices of rock subclassification are achieved.
在此基础上，对各亚级围岩的物理力学参数取值范围进行研究。