Deformation Localization and Damage Constitutive Model of Raw Coal and Briquette Coal under Uniaxial Compression

Table 1

Fitting parameters of theoretical model.

Material type	Coordinate of stress point of crack closure (%, MPa)	Elastic modulus (MPa)		(%)	(MPa)
Raw coal	(1.27, 8.45)	1321	0.25	0.68	2.679	0.996
Briquette coal	(0.79,2.23)	567	0.9	0.38	0.179	0.985