Experimental Study on the Evolution Law of Mesofissure in Full Tailing Cemented Backfill

Table 4

Pore characteristic parameters of backfill.

In the loading stage	Characteristic parameter
	Face rate (%)	Fracture density (mm/mm^2)	Average pore size (μm)
Original specimen	8.77	2.32	21.37
Compaction stage	7.28	1.62	22.05
Elastic deformation stage	9.24	3.22	34.53
Plastic deformation stage	17.11	6.54	42.54
Postpeak failure stage	25.44	14.66	266.41