Key Blasting Parameters for Deep-Hole Excavation in an Underground Tunnel of Phosphorite Mine

Table 1

Material parameters.

Explosive parameters	Density	Detonation speed D	Pressure PCJ	Bulk modulus K	Shear modulus G	—
	1.0	0.36	3.24E − 02			—
Air parameter	Density	Cutoff pressure pc	Dynamic viscosity coefficient MU	Relative volume TEROD	Elastic modulus YM	Poisson’s ratio PR
	1.2929E − 03
Rock mechanics parameters	Bulk weight (g/cm^3)	Elastic modulus E (GPa)	Poisson’s ratio	Uniaxial compression (MPa)	Tensile strength (MPa)	Cohesion C (MPa)
	2.73	55	0.36	65	4.5	45