Table 2 Table of physical and mechanical parameters of coal and rock mass for numerical simulation.

From: Study on mining-induced stress behavior on surrounding rock of rockburst mine under large buried depth and hard overburden

Stratum

maxDensity (Kg/m3)

seamModulus of elasticity (GPa)

Poisson’s ratio

Cohesion (MPa)

Angle of internal friction (°)

Minability tensile strength (MPa)

Loess

1640

0.185

0.14

0.0938

34.5

0.35

Transition layer

2541

8.136

0.25

4.8

34.21

2.81

Thick sandstone

2618

11.62

0.22

4.249

34.00

3.17

Coal roof

2548

6.48

0.17

2.505

25.97

2.7

Coal 8

1390

2.607

0.25

2

24.80

1.97

Mudstone floor

2200

3.07

0.25

2.37

26.21

1.91

Sandstone floor

2447

9.28

0.26

4.408

34.05

1.78

bedrock

2550

14

0.24

5.62

33.31

2.81

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