Shaft-Sinking Practice and Equipment at the Hallnor Mine

IT is the purpose of this essay to give a reasonably complete description of shaft sinking under a rock pentice in a small Northern Ontario gold property. Hallnor is in many ways an exceptional mine, but the sinking operations here described are but typical examples of the excellent practice for which Canadian mines and mining engineers are justly famous the world over.
Keywords: Air, blasting, centre of gravity, pounds per square inch, steel, sump, winze, Costs, Operation, Rock, Rocks, Shafts, Water, Waters
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