Table 6 Properties of joints for each stratum in the model.

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

lithology

Joint parameters

Shear stiffness (GPa)

Normal stiffness (GPa)

Cohesion

(MPa)

Friction Angle (°)

Tensile strength (MPa)

Mudstone

31.7

79.2

0.40

11

0.02

Siltstone

87.2

217.9

0.40

21

0.04

Sandstone

44.0

110.1

0.30

12

0.02

coal

35.7

89.2

0.50

21

0.07

sandy mudstone

49.2

123.1

0.35

9

0.01

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