Position

Lithology

Density kg/m³

Compressive strength/Mpa

Tensile strength/Mpa

Poisson’s ratio

Cohesive force

Secant modulus

Tangent modulus

roof

siltstone

2620

37.15

2.06

0.15

4.3

0.77

0.84

roof

sandstone

2480

60.2

4.56

0.32

4.6

1.06

1.13

floor

mudstone

2100

8.7

0.6

0.9