Experimental Study on the Fine Iron Ore Tailing Containing Gypsum as Backfill Material

Table 1

Physical properties of the backfill material.

Material	Specific gravity	Loose bulk density (t/m³)	Compacted bulk density (t/m³)	Porosity (%)	Rest angle (°)
Tailing	2.772	1.290	1.590	42.60	33.73
PC	3.106	1.252	1.687	45.68	32.65
FP	2.985	1.367	1.703	42.95	34.28
HZ	3.262	1.389	1.792	45.06	33.32