Optimization of Land Saving and Loss Reducing and Slope Stability Variation Patterns in Open-Pit Mine

Table 2

Physical and mechanical parameters of rock and soil.

Stratum	Density ρ (g/cm^3)	Cohesion (KPa)	Internal friction angle φ (°)
Dumping material	1.98-2.21	13.2-17.8	23.5-26.1
Quaternary	1.911-2.103	33.4-36.5	13.8-15.1
Mudstone 1	2.147-2.233	286-313	14.7-16.5
Mudstone 2	2.144-2.215	310-341	15.8-17.3
Mudstone 3	2.493-2.579	317-350	16.1-18.2
Siltstone 1	2.018-2.135	314-346	16-19.6
Siltstone 2	2.031-2.146	342-377	17.1-20.2
Fine sandstone	2.246-2.367	368-398	19.3-22.3
Coal	1.248-1.322	240-372	16.6-19.8