Study on Microstructural Evolution and Strength Growth and Fracture Mechanism of Cemented Paste Backfill

Table 2

Characteristic value of particle size.

Fineness/mesh	Particle size/μm	Percentage/%	Cumulative percentage/%
<500	0~25	56.7	56.7
500~325	25~45	10.8	67.5
325~200	45~75	11.2	78.7
200~150	75~106	7.4	86.1
150~100	106~150	7.8	93.9
100~80	150~180	3.2	97.1
>80	>180	2.9	100