Sample name | Density (Kg/m3) | Angle of internal friction (degree) | Cohesion (KPa) |
Loess | 1950 | 29.5 | 45.1 |
Mudstone | 2440 | 30.0 | 1275.3 |
Sandy mudstone | 2450 | 30.0 | 2256.3 |
Packsand | 2450 | 31.0 | 3237.3 |
Medium sandstone | 2270 | 31.5 | 2452.5 |
Gritstone | 2240 | 32.0 | 1760 |
Contain gravel gritstone | 2260 | 33.0 | 3924 |
Coal | 1400 | 35.0 | 1851 |