Rockburst Prediction Based on the KPCA-APSO-SVM Model and Its Engineering Application

Table 2

Part of the rockburst samples.

No.	Prediction indices			Actual level
	σθ/σc	σc/σt	Wet
1	0.11	31.2	7.4	I
2	0.10	23.0	5.7	I
3	0.20	36.0	2.3	I
4	0.44	13.1	2.1	II
5	0.37	24.0	5.1	II
…	…	…	…	…
100	0.66	22.3	3.2	III
101	0.72	27.5	4.3	III
102	0.62	19.4	4.5	III
103	0.64	17.5	7.2	IV
104	0.65	12.4	5.4	IV