Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics

Table 1

The value of parameters in the constitutive model at different confining pressures.

Number	σ3 (MPa)	E (GPa)	μ	σcd (MPa)	σp (MPa)	εp (%)	σr (MPa)	εr (%)	K = 1.00		K = K0
									m	F0	m	F0	K0
1	15	55.58	0.20	169.44	205.17	0.44	172.77	0.45	3.79	203.90	81.31	202.00	0.83
2	25	61.62	0.27	238.64	267.19	0.43	150.66	0.44	12.38	260.61	139.75	232.26	0.93
3	35	74.94	0.34	284.09	346.37	0.46	0	0.47	19.31	331.98	179.87	292.90	0.95