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

Table 6

The permeability evolution during the loading-unloading process with the axial strain 1.61%.

Permeability	(m^2)	(m^2)	(m^2)	(m^2)
2 MPa ⟶ 4 MPa
2 MPa ⟶ 6 MPa
2 MPa ⟶ 8 MPa
2 MPa ⟶ 10 MPa