Table 1 The relevant mechanical parameters of ore and rock.
From: Investigation on the transition depth of open pit to underground mining in Sijiaying iron mine
Density/t·m−3 | Compressive strength/MPa | Tensile strength/MPa | Cohesion/MPa | Angle of internal friction/(°) | |
|---|---|---|---|---|---|
Ore | 3.16 | 124.2 | 2.0 | 8.0 | 34.3 |
Rock | 2.70 | 150.0 | 2.1 | 6.0 | 34.5 |
