Table 1 Mechanical parameters of each rock stratum.

From: Research on the surface subsidence characteristics and prediction models caused by coal mining under the reverse fault

Lithology

Thickness/m

Elastic modulus /GPa

Poisson’s ratio

Cohesive force /MPa

Tensile strength /MPa

Internal friction angle /°

Sandstone

20

0.425

0.20

8.45

29.50

25

Coal

5

1.46

0.30

0.50

0.50

30

Fine sandstone

15

0.775

0.21

3.55

34.00

22

Siltstone

10

0.425

0.20

8.45

29.50

25

Conglomerate

10

1.94

0.27

16.75

32.00

29

Fine sandstone

20

0.775

0.21

3.55

34.00

22

Siltstone

5

0.425

0.20

8.45

29.50

25

Fine sandstone

15

0.775

0.21

3.55

34.00

22

Medium sandstone

80

0.69

0.26

5.15

37.20

25

Topsoil layer

115

0.05

0.15

0.80

20.00

35

Fault

5

0.05

0.2

0.25

0.002

15

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