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

Table 1

Rock mechanical parameters of each rock formation.

	Elastic modulus, E (MPa)	Cohesion, C (kPa)	Friction, Φ (°)	Poisson’s ratio,	Volumetric weight, ρ (g·cm^−3)
Granite gneiss	50000	30000	50	0.23	2.8
Weakly weathered basalt	11892	1810	37.2	0.26	2.6
Strongly weathered basalt	7824	1690	36.7	0.28	2.43
Weak interlayer 1	1076	220	21.6	0.32	2.4
Weak interlayer 2	1506	330	25.1	0.3	2.35
Weak interlayer 3	2500	450	30	0.3	2.0