Stability Analysis and Confidence Level Evaluation of Backfill Mining under High and Steep Rock Slopes

Table 6

Confidence level analysis results.

Analysis methods	Failure probabilities	Reliability index		Mean safety factor
		Normal	Lognormal
CDSS	0.0201	13.311	16.850	1.637
OSM	0.0165	14.677	18.513	1.624
CPSN	0.0070	10.722	—	2.676
OPSL	0.0136	—	14.316	1.722
Average value	0.0143	12.903	16.560	1.915