Table 4 Fitting parameters of triaxial test results.

From: Statistical damage constitutive model of soft rock based on Improved Hoek-Brown strength criterion

Confining pressure/MPa

m

F0

0

1.2708

18.4404

5

1.2006

23.3343

10

1.0556

27.2780

15

0.9011

34.6628

20

0.7212

36.6836

25

0.716

41.3325

30

0.5772

41.0090