Mining in Manitoba

Sublevel Mining

Engineering Considerations

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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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ringd.jpg (7820 bytes)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.