Table 1 Ratio table of similar simulation test.

From: Study on transportation and stress distribution of the overburden rock of gob side entry with cutting top and unloading pressure

Serial number

Lithology

Proportion number

Density (g cm-3)

Compressive strength (MPa)

Layer thickness (cm)

Dry material quality (kg)

Fine river sand

Calcium carbonate

Gypsum

1

Muddy siltstone

346

1.683

0.794

13.2

53.32

7.11

10.66

2

Siltstone

673

1.894

0.243

4

20.78

2.42

1.04

3

Coal

773

1.813

0.208

4

20.31

2.03

0.87

4

Mudstone

646

1.735

0.417

0.6

2.86

0.19

0.29

5

Muddy siltstone

346

1.683

0.794

1.4

5.65

0.75

1.13

6

Fine sandstone

537

1.734

0.615

4.4

20.35

1.22

2.85

7

Muddy siltstone

346

1.683

0.794

20

80.78

10.77

16.16

Back to article page