Table 1 Specific parameters of similar test model.

From: Study on migration instability characteristics and mine pressure control of roof overburden rock in thin coal seams mining

Number

Lithology

Thickness /m

Volumetric weight /

(KN·m− 3)

Model /mm

Layer number

Proportion number

16

Limestone

45

27.00

90

3

655

15

Sandy mudstone

12.4

25.22

248

15

828

14

Mudstone

2.7

25.72

54

3

837

13

Sandy mudstone

7.0

25.22

140

7

837

12

Fine sandstone

3.7

42.58

74

4

737

11

Sandy mudstone

3.6

25.22

72

4

837

10

Fine sandstone

3.4

25.26

68

3

737

9

Sandy mudstone

3.1

25.22

62

3

837

8

Fine sandstone

3.1

45.59

62

4

755

7

Sandy mudstone

7.0

35.62

140

14

837

6

Fine sandstone

2.8

42.15

56

2

737

5

Sandy mudstone

9.0

34.58

180

18

837

4

Coal-rock

1.5

25.22

30

4

837

3

Sandy mudstone

1.2

25.22

24

2

837

2

Fine sandstone

2.6

27.57

52

3

855

1

Sandy mudstone

1.5

25.22

30

3

828

0

C19 coal seam

1.2

14.50

24

1

26:1:5:16

Total count

70.3

-

1406

93

-