Table 3 Rock mechanics parameters in simulation.

From: Interaction law between mining stress and fault activation and the effect of fault dip angle in longwall working face

Lithology

Density /(kg/m3)

Bulk modulus /GPa

Shearmodulus

/GPa

Cohesion /MPa

Internal friction angle /°

Tensile

strength /MPa

Compressive strength/MPa

RQD/%

Medium sandstone

2850

6.10

5.01

3.1

37

3.2

32

62

Sandy mudstone

2750

2.78

1.88

2.1

31

1.6

30

57

Fine sandstone

2650

5.66

4.18

2.2

34

2.1

45

67

Mudstone

2250

2.05

0.67

1.1

28

1.1

29

30

Coal seam

1300

1.20

0.38

0.85

24

0.9

22

28

Back to article page