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Table 2 Mechanical parameters of the numerical model of the generator unit #4

From: Splitting failure in side walls of a large-scale underground cavern group: a numerical modelling and a field study

Rock mass classification

Bulk density (kN/m3)

Deformation modulus (GPa)

Friction angle (°)

Cohesion (MPa)

Poisson’s ratio

Tensile strength (MPa)

II

26.5

23.5

52.4

2.0

0.25

8.0

III

26.5

9.5

47.7

1.4

0.27

6.0

IV

26.5

2.5

38.7

0.7

0.35

4.0

II/III

26.5

16.5

50.2

1.7

0.26

7.0