A Three-Dimensional Nonlinear Dynamic Numerical Optimization of the Risks of Stope Blasting Based on FOA-GRNN

Table 7

RHT constitutive parameters of rock.

Constitutive parameters	Assignment	Constitutive parameters	Assignment	Constitutive parameters	Assignment
Reference density	2.75 g·cm^−3	T2	0	α	0.029
Porous density	2.52 g·cm^−3	T0	300 k	δ	0.036
Porous sonic wave velocity	5223 m·s^−1	Specific heat	653 J/(kgK)	PREFACT	2
Initial compaction pressure	0.05 GPa	Covering the elastic surface	Yes	TENSRAT	0.75
Solid compaction pressure	1.6 GPa	Shear modulus	39.2 GPa	COMPRAT	0.65
Compaction index	4	Fc	0.14 GPa	Damage constant D1	0.04
ρs0	2.96 g·cm^−3	Ft/Fc	0.7	Damage constant D2	1
		Fs/Fc	0.53	Minimum failure strain	0.013
A1	60.2 GPa	A	1.75	SHRATD	0.13
A2	90.3 GPa	N	0.67	Tensile stress	Hydro (Pmin) model
A3	72.4 GPa	Q	0.69	Failure mode	Limit
B0	1.22	Brittle transition toughness	0.015
B1	1.22	B	1.6
T1	60.2 GPa	M	0.61