Table 2 Physical and mechanical parameters of rock and soil strata in the mining Area.

From: Evolution mechanisms of mining-induced overlying strata structures: a case study in the Qinshui coalfield

Rock layer

Depth(m)

Density (kg/m3)

Coh

(kPa)

Fri (°)

E(MPa)

v

Loess

6

1920

31

26

60

0.21

Mudstone

16

2100

1560

27

2500

0.23

Sandy mudstone

26

2200

1560

25

5500

0.19

Mudstone

40

2100

2730

26

5700

0.23

Coal

42

1400

530

23

1000

0.3

Mudstone

64

2100

2730

26

5700

0.23

Sandy mudstone

80

2300

1600

28

9000

0.2

Coal

84

1400

530

23

1000

0.3

Siltstone

104

2200

1560

25

5500

0.2

Siltstone

120

2200

1560

25

5500

0.2

Fine sandstone

124

2600

3500

32

9860

0.2

Fine sandstone

150

2600

3500

32

9860

0.2

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