Principles of mining : valuation, organization and administration; copper, gold, lead, silver, tin and zinc . ey are to no timber is to be handled, and little ore, and this on cages,the stations need be no larger than a good sized timber is to be let down, they must be ten to fifteenfeet higher than the floor of the crosscut. Where loading intoskips is to be provided for, bins must be cut underneath andsufficient room be provided to shift the mine cars bins are built of from 50 to 500 tons capacity in orderto contain some reseive for hoisting purposes,
Principles of mining : valuation, organization and administration; copper, gold, lead, silver, tin and zinc . ey are to no timber is to be handled, and little ore, and this on cages,the stations need be no larger than a good sized timber is to be let down, they must be ten to fifteenfeet higher than the floor of the crosscut. Where loading intoskips is to be provided for, bins must be cut underneath andsufficient room be provided to shift the mine cars bins are built of from 50 to 500 tons capacity in orderto contain some reseive for hoisting purposes, and inmany cases separate bins must be provided on opposite sidesof the shaft for ore and waste. It is a strong argument infavor of skips, that with this means of haulage storage capacityat the stations is possible, and the hoisting may then go onindependently of trucking and, as said before, there are noidle men at the stations. It is always desirable to concentrate the haulage to theleast number of levels, for many reasons. Among them isthat, where haulage is confined to few levels, storage-bins are 84. Fig. 15. —Cross-section of station arrangement for .skip-haulage in vertical shaft
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