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

Table 8

Parameters of the stemming material.

Density (kg/m^3)	Shear modulus (GPa)	Bulk modulus(GPa)	A0	A1	A2	PC	EPS1	EPS2
1800	1.60E-2	1.328	0.0033	1.31E-7	0.1232	0.0	0.0	0.05
EPS3	EPS4	EPS5	EPS6	EPS7	EPS8	EPS9	EPS10	P1(GPa)
0.09	0.11	0.15	0.19	0.21	0.221	0.25	0.30	0.0
P2 (GPa)	P3 (GPa)	P4 (GPa)	P5 (GPa)	P6 (GPa)	P7 (GPa)	P8 (GPa)	P9 (GPa)	P10 (GPa)
3.42	4.53	6.76	12.70	20.80	27.10	39.20	56.60	123.0

Note: A₀, A₁, and A₂ are constants of yield function; PC is truncation pressure of tensile failure; EPS1~ EPS10 are characteristic bulk strains; P₁ ~ P₁₀ are pressures corresponding to characteristic bulk strains.