Effect of the Size and Position of a Damping Ditch on the Reduction of the Blasting Vibration

Table 3

Material parameters of the rock model.

ρ/(g·cm^3)	Density	0.1
G/GPa	Shear modulus	14.8
A	Normalized cohesive	0.79
B	Normalized pressure hardening	1.6
C	Strain rate coefficient	0.007
N	Pressure hardening exponent	0.61
FC/MPa	Quasi-static uniaxial compressive strength	48
T/MPa	Maximum tensile hydrostatic pressure	4
EPS0	Reference strain rate	0.001
EFMIN	Amount of plastic strain before fracture	0.01
SFMAX/GPa	Normalized maximum strength	7
PC/MPa	Crushing pressure	16
UC	Crushing volumetric strain	0.001
PL/MPa	Locking pressure	800
UL	Locking volumetric strain	0.1
	Damage constant	0.04
	Damage constant	1
, , /GPa	Pressure constant	85, −171, 208

We used the ∗ MAT_PLASTIC_KINEMATIC (plastic follow-up hardening model) material model mechanical properties shown in Figure 4.