Mining in Manitoba
Sublevel Mining
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A method in which the ore is blasted from sublevels and removed from the level below. Many sub-levels are located between levels. Requires a long development time but produces high tonnage once in production. This method is largely confined to steep dips and to orebodies permitting either long-hole benching or ring drilling practice. |
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On the basis
of safety, costs, and flexibility, practice at present appears to favour ring drilling
over benching. Sublevel stopes depend on large stope dimensions. The orebody can mined as
longitudinal or traverse stopes.