Shanghai Huatong Copper Price Chart March 10

Shanghai Huatong Copper Price Chart March 10

Transportation facilities of some sort must be provided when underground work is begun. These may or may not be retained as mine development expands and ore production begins, but they are likely to prove inadequate after the mine comes into part or full production. Thus, hand tramming and hoisting in buckets or in small cars on cages may serve when tramming distances are short and the amount of ore and rock to be handled is small, while large cars, locomotive haulage, and hoisting in skips may be required for economical transportation once the mine hits its production stride.

Mine Transportation Control System Underground

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