Table 4 The physical composition and elements of backfill material samples/%
From: Strata behavior at fully-mechanized coal mining and solid backfilling face
Samples | Na2O | MgO | Al2O3 | SiO2 | K2O | CaO | Fe2O3 | P |
|---|---|---|---|---|---|---|---|---|
Backfill material | 0.65 | 1.8 | 17.6 | 59.9 | 2.4 | 2.0 | 5.4 | 0.06 |
S | F | Ba | Mn | Cu | Pb | Zn | Ti | Cl |
|---|---|---|---|---|---|---|---|---|
0.44 | ≤0.045 | 0.10 | 0.054 | <0.0002 | <0.0002 | 0.009 | 0.50 | 0.011 |