Table 4 Physical and mechanical parameters of rock strata in the model.

From: Evolution of plastic zone in surrounding rock of roadway within anisotropic stratum under complex in-situ stress

lithology

Intact Rock

Rock Mass

Compressive Strength (MPa)

Poisson’s Ratio

Compressive Strength (MPa)

Elastic Modulus (GPa)

Mudstone

12.0

0.32

2.98

0.84

Siltstone

13.0

0.27

3.35

1.28

Sandstone

11.2

0.24

2.83

0.89

coal

16.1

0.25

4.25

2.39

sandy mudstone

9.8

0.21

2.53

1.32

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