Parameter

Lithologic characters

Bulk modulus/GPa

Shear moduus/GPa

Tensile strength/MPa

Cohesion/MPa

Angle of internal friction/

Density/ kg/m³

Fine grain quartz sandstone

6.1

4

1.49

1.5

13

25.7

Sandy mudstone

3.44

2.4

1.1

1.8

17

26

Mudstone

2.5

1.4

0.6

1.67

19

25

Carbon mudstone

2.5

1.4

1.42

2.6

23

26

3# coal seam

2.31

1.6

0.2

1.06

9

14

The fine feldspathic sandstone

10.9

4.9

1.8

1.93

22

27