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

Table 4

Single-index prediction methods of rock burst grade.

Single-index prediction methods	Indicators	Rock burst grade
		I	II	III	IV
Barton’s method		>10	5 to 10	2.5 to 5	<2.5
Russenes’ method		<0.2	0.2 to 0.3	0.3 to 0.55	<0.55
Xu et al.’s method		>0.15		0.07 to 0.15	<0.02