Stability Assessment of Dangerous Rock Mass of an Overhanging Slope in Puerdu Town, Southwestern China

Table 7

Calculation results of dangerous rock stability.

Failure mode	Dangerous rock number	Working condition	Stability factor	Stable state	Hazard probability (%)
Falling type	W1	I	1.075	Understable	20.4
		II	0.950	Unstable	30.8
		III	0.928	Unstable	32.7
	W3	I	1.024	Understable	24.7
		II	0.980	Unstable	28.3
		III	0.953	Unstable	30.6
	W4	I	1.101	Understable	18.3
		II	0.953	Unstable	30.6
		III	0.909	Unstable	34.3
	W6	I	1.006	Understable	26.2
		II	0.863	Unstable	38.1
		III	0.833	Unstable	40.6
Tipping type	W2	I	1.026	Understable	24.5
		II	0.907	Unstable	34.4
		III	0.866	Unstable	37.8
	W5	I	1.168	Understable	12.7
		II	1.085	Understable	19.6
		III	1.040	Understable	23.3