An article from Broadleaf.
A client wished to increase the ventilation capacity of an underground mine to allow the working area to be expanded. There was some disagreement about the air flow specification that the system should meet inside the mine, the best technical approach to delivering the required air flow and the best location for a large vertical shaft required to connect the mine workings to the surface. A prefeasibility study had become bogged down with disagreements about major design criteria and trade-offs.
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