Theoretical Calculation and Experimental Analysis on Initial Shock Pressure of Borehole Wall under Axial Decoupled Charge

Table 1

Physical-mechanical parameters of Grade III surrounding rock.

Density(kg/m^3)	Compressive strength(MPa)	Tensile strength (MPa)	Shear strength (MPa)	Longitudinal wave velocity (m/s)	Poisson ratio
2700	75	5.6	23.3	3350	0.23