Rock name

Thickness (m)

Unit weight (kg/m3)

Bulk modulus (MPa)

Shear modulus (MPa)

Tensile strength (MPa)

Cohesiveness (MPa)

Internal friction angle (˚)

Siltstone

7.0

2530

5690

3290

5.5

8.3

41.5

Fine-Sandstone

9.0

2630

3600

3600

6.8

6.3

36

Medium grained sandstone

4.0

2630

3860

3500

6.7

6.2

38.5

Sandy mudstone

4.0

2400

4167

2869

1.8

3.2

37

Siltstone

8.0

2530

5690

3290

5.5

8.3

41.5

Sandy mudstone

2.0

2400

4167

2869

1.8

3.2

37

Coal seam (No. 5)

3.25

1340

1670

1480

3.8

2.75

36.5

Quartz sandstone

1.44

2530

7120

8350

7.9

9.3

26

Siltstone

5.15

2530

5690

3290

5.5

8.3

41.5

Quartz sandstone

8.51

2530

7120

8350

7.9

9.3

26

Siltstone

2.9

2530

5690

3290

5.5

8.3

41.5

K2 limestone

3.22

2090

2260

1110

1.71

3.65

37