Research on the Influence of Weak Interlayer in Open-Pit Slope on Stability

Table 3

Factor-of-safety reduction ratio of the slope after softening of different weak layers.

	Factor-of-safety reduction ratio
	Ordinary (%)	Bishop (%)	Janbu (%)	Janbu generalized (%)
Weak layer 1 softening	35.48	44.27	43.16	35.71
Weak layer 2 softening	11.05	11.73	14.61	5.5
Weak layer 3 softening	0	0	0	0