Stress Distribution and Mechanical Behaviour of Rock Mass Containing Two Openings Underground: Analytical and Numerical Studies

Table 1

The mesoparameters of numerical models in PFC.

Particle parameters			Parallel bond parameters
	3.0 GPa	Effective modulus		3.0 GPa	Bond effective modulus
	1.0	Ratio of particle normal to shear stiffness		1.0	Ratio of normal to shear stiffness of the parallel bond
	0.577	Particle friction coefficient		25.0 MPa	Tensile strength of the parallel bond
	0.75 m	The maximum particle radius		15.0 MPa	Shear strength of the parallel bond
	0.5 m	The minimum particle radius
	2.5 g/cm^3	Particle density