Prediction of Grade Classification of Rock Burst Based on PCA-SSA-PNN Architecture

Table 6

The statistical results of Table 5.

Prediction methods		Performances
		Overprediction ratio (%)	Underprediction ratio (%)	Accuracy ratio (%)	Error ratio (%)
Single-index	Barton’s method	57.1	0	42.9	57.1
	Russenes’ method	85.7	0	14.3	85.7
	Xu et al.’s method	21.4	7.1	71.5	28.5
Multi-index	BP	21.5	7.1	71.5	28.5
	SVM	14.2	0	85.8	14.2
	RF	28.5	0	71.5	28.5
	Standard PNN	7.1	14.3	78.6	21.4
	PCA-SSA-PNN	7.1	0	92.9	7.1