Study on the Fracture Evolution Law of Coal Based on Image Retrieval Method and X-Ray Computed Tomography

Table 2

The scanning stage of the coal sample.

The scanning stage	1	2	3	4	5	6
Axial stress (MPa)	3.21	16.55	33.20	40.23	28.41	22.51
Axial strain (%)	0.00	0.85	1.39	1.72	2.34	3.49