Damage Ratio Based on Statistical Damage Constitutive Model for Rock

Table 1

The mechanical parameters subjected to different confining pressures for sandstone.

Confining	σ1	ε1/10^−3	E	Es	μ
Pressure (MPa)	(MPa)		(GPa)	(GPa)
0	31.34	5.125	7.556	6.115	0.291
3	52.19	12.783	5.525	4.083	0.292
6	75.38	16.573	6.702	4.548	0.301
9	92.40	17.787	8.052	5.195	0.311
12	102.50	19.539	8.351	5.246	0.318
24	151.61	24.780	10.124	6.118	0.324