A New Reliability Rock Mass Classification Method Based on Least Squares Support Vector Machine Optimized by Bacterial Foraging Optimization Algorithm

Table 2

Selection rule of groundwater development state.

Reflected wave strength case	S <	S ≥	S >>	S >>  and Vp/Vs increases suddenly	S >>  and Vp/Vs increases sharply
Evaluation value	0 ∼ 0.2	0.2 ∼ 0.4	0.4 ∼ 0.6	0.6 ∼ 0.8	0.8 ∼ 1.0