Study on the Permeability Evolution and Its Formation Mechanism of Xiaojihan Aquifer Coal Seam under Plastic Flow

Table 12

The confining pressure influence coefficient of nonwater specimen.

Axial strain (%)	Confining pressure influence coefficient
	L-1.61	0.26	0.11	0.078	0.057
L-1.72	0.22	0.058	0.055	0.046
L-1.79	0.21	0.055	0.045	0.038
L-1.81	0.042	0.016	0.012	0.0082
L-2.01	0.061	0.017	0.0095	0.0055