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

Table 5

The relative residual strain of curve under different axial strains.

Axial strain (%)	Cycle times
	1	2	3	4
X-1.61
X-1.72
X-1.79
X-1.81
X-2.01	0.00108