Table 3 Average production and technical-economic indicators for open pit and underground mining at the mine.
From: Investigation on the transition depth of open pit to underground mining in Sijiaying iron mine
Exploration line No. | α/(°) | β/(°) | δ/(m) | ρ/(t∙m-3) | Ca(¥∙t-1) | Cb(¥∙t-1) | Cu(¥∙t-1) |
|---|---|---|---|---|---|---|---|
N12 | 43 | 36 | 70 | 3.16 | 16.80 | 30.20 | 108.96 |
N14 | 41 | 38 | 72 | ||||
N16 | 41 | 34 | 70 | ||||
N18 | 42 | 34 | 70 | ||||
N20 | 43 | 34 | 74 | ||||
N22 | 41 | 35 | 74 | ||||
N24 | 43 | 35 | 76 | ||||
N26 | 43 | 36 | 80 | ||||
N28 | 43 | 36 | 80 |
