Table 1 Similar model of each rock similar material ratio table.

From: Study on fracture development and failure characteristics of repeated mining overlying strata in multi-coal seams with faults

No.

Rock formation

Proportion number

Thickness (cm)

Gross weight (kg)

River sand (kg)

Lime (kg)

Gypsum (kg)

Water (kg)

1

Fine sandstone

764

8

71.1

49.77

12.798

8.532

21.33

2

Muddy siltstone

755

4.6

42.412

33.81

5.846

2.756

3.86

3

Siltstone

846

9

83.7

66.96

6.696

10.044

16.74

4

Mudstone

828

5

46.5

37.2

1.86

7.44

9.3

5

Silty mudstone

846

1.3

7.8975

6.318

0.6318

0.9477

1.5795

6

5# coal seam

855

2.6

9.435

7.548

0.9435

0.9435

1.887

7

Mudstone

828

5.5

51.15

40.92

2.046

8.184

10.23

8

Siltstone

846

1.2

9.63

7.704

0.7704

1.1556

1.926

9

Fine sandstone

764

8

71.1

49.77

12.798

8.532

21.33

10

Silty mudstone

846

4.5

27.3375

21.87

2.187

3.2805

5.4675

11

9# coal seam

855

1.7

8.325

6.66

0.8325

0.8325

1.665

12

Mudstone

828

2.3

21.39

17.112

0.8556

3.4224

4.278

13

Siltstone

846

3.9

31.2975

25.038

2.5038

3.7557

6.2595

14

12# coal seam

855

2.8

9.99

7.992

0.999

0.999

1.998

15

Siltstone

846

3

24.075

19.26

1.926

2.889

4.815