Optimal Intensity Measures for Probabilistic Seismic Stability Assessment of Large Open-Pit Mine Slopes under Different Mining Depths

Table 1

The rock physical and mechanical properties of the open mining slope along A1 profile.

Rock types	Density (kg/m^3)	Elastic modulus (MPa)	Poisson ratio	Internal friction angle (°)	Cohesion (MPa)
Strongly weathered andesite porphyry	2230	241.83	0.30	24	0.16
Moderately weathered andesite porphyry	2390	1561.44	0.30	32	0.25
Slightly weathered andesite porphyry	2580	3587.58	0.22	37	0.76
Strongly weathered pyroclastic rock	2150	284.52	0.29	25	0.17
Moderately weathered pyroclastic rock	2260	1060.40	0.23	30	0.20
Slightly weathered pyroclastic rock	2430	4062.90	0.29	36	0.67
Moderately weathered biotite hornblende mountain porphyry	2560	2953.59	0.25	34	0.60
Slightly weathered biotite hornblende mountain porphyry	2640	7884.14	0.22	39	1.10