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

Table 6

Classification results verification of Suqiao tunnel.

Group number	Tunnel mileage (YK)	Survey results before excavation	Forecast results		BQ evaluation after excavation
			Classification	Probability (%)
1	K94 + 653 ∼ K94 + 683	V1	V1	59.74	V1
2	K94 + 713 ∼ K94 + 743	IV1	III2	51.83	III2
3	K94 + 743 ∼ K94 + 773	IV1	III2	48.25	III2
4	K94 + 816 ∼ K94 + 846	IV3	V1	40.36	V1