Table 1 Simulate the mesoscopic parameters of laboratory tests.

From: Numerical simulation of crack propagation and AE precursor characteristics in coal failure under confining pressures

Basic parameters of particles

Value

Parallel bond parameters

Value

Rmin (mm)

0.3

E (GPa)

1.62

Rmax (mm)

0.5

kn/ks

10

(kg/m3)

1650

σt (MPa)

20.2

n/%

0.1

c (MPa)

20.2

Particle friction coefficient

0.3

φ

20

Particle stiffness ratio

0.5

-

-