Elastoplastic Analysis of Circular Openings in Elasto-Brittle-Plastic Rock Mass Based on Logarithmic Strain

Table 1

Geometry and material property parameters.

Types of rock	Hard rock	Soft rock
Radius of opening, (m)	1	1
Initial stress, (MPa)	1	1
Supporting pressure, (MPa)	0	0
Young’s modulus, (GPa)	50	5
Poisson ratio, (-)	0.2	0.2
Dilation angle, (Deg)	0,30	0,30
(MPa)	0.173	0.276
(Deg)	55	35
(MPa)	0.061	0.055
(Deg)	52	30