Development of a Model for Initial Compaction Stage in Rock Based on Energy Dissipation

Table 1

Error analysis of the Damage constitutive model.

No.	Rock type	Coefficient of determination (R^2)
		Equation (13)	Equation (24)	Equation (30)
1	Coal	0.9964	0.9932	0.9997
2	Granite	0.9887	0.9996	0.9979
3	Marble	0.9986	0.9908	0.9980
4	Sandstone	0.9997	0.9968	0.9991
5	Shale	0.9995	0.9995	0.9917