Table 5 Ratios of similar materials in different rock layers.

From: Study of the development patterns of water-conducting fracture zones under karst aquifers and the mechanism of water inrush

Serial number

Rock lithology

Stratum thickness (cm)

Similar density (kg/m3)

Stratum weight (kg)

Tensile strength (MPa)

Mixing ratio number

Sand (kg)

Lime (kg)

Gypsum (kg)

Water (kg)

17

Limestone

41.00

1541

236.93

3.50

655

203.08

16.92

16.92

26.33

16

Muddy siltstone

11.40

1606

68.66

2.21

837

61.03

2.29

5.34

7.63

15

Limestone

27.50

1541

158.92

3.50

655

136.21

11.35

11.35

17.66

14

Mudstone

1.00

1500

5.63

1.50

955

5.06

0.28

0.28

0.63

13

Limestone

1.40

1541

8.09

3.50

655

6.93

0.58

0.58

0.90

12

Silty mudstone

3.30

1612

19.95

2.57

737

17.45

0.75

1.75

2.22

11

Siltstone

1.50

1718

9.66

2.39

773

8.46

0.85

0.36

1.07

10

Fine sandstone

2.10

1729

13.62

4.06

537

11.35

0.68

1.59

1.51

9

Coal seam 4

0.60

1006

2.26

1.00

1055

2.06

0.10

0.10

0.25

8

Fine sandstone

3.20

1729

20.75

4.06

537

17.29

1.04

2.42

2.31

7

Coal seam 5

1.80

988

6.67

1.00

1055

6.06

0.30

0.30

0.74

6

Silty mudstone

1.60

1612

9.67

2.57

737

8.46

0.26

0.95

1.07

5

Mudstone

1.40

1500

7.88

1.50

955

7.09

0.39

0.39

0.88

4

Siltstone

3.60

1718

23.19

2.39

773

20.29

2.03

0.87

2.58

3

Coal seam 9

2.10

976

7.69

1.00

1055

6.99

0.35

0.35

0.85

2

Siltstone

6.30

1541

36.41

3.59

637

31.21

1.56

3.64

4.05

1

Fine sandstone

10.20

1688

64.57

3.88

573

53.81

7.53

3.23

7.17

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