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