Transactions . 216 Cost of power consumption 0. 00015 0. 00132 Total $ $ consumed The cars used are of the Granby type, automatic side dump, and havea capacity of 4 tons. These cars have given very good service, and havebeen reinforced considerably to withstand the hard usage they getfrom the very large rocks which are drawn from the chutes, some ofwhich weigh 3 tons. VOL. LXIII. 31. 482 MINING METHODS IN ALASKA A train crew, aside from the bulldozers, consists of a motorman, twochute punchers, and one mucker. The tonnage handled by a trammingcrew on an 8-
Transactions . 216 Cost of power consumption 0. 00015 0. 00132 Total $ $ consumed The cars used are of the Granby type, automatic side dump, and havea capacity of 4 tons. These cars have given very good service, and havebeen reinforced considerably to withstand the hard usage they getfrom the very large rocks which are drawn from the chutes, some ofwhich weigh 3 tons. VOL. LXIII. 31. 482 MINING METHODS IN ALASKA A train crew, aside from the bulldozers, consists of a motorman, twochute punchers, and one mucker. The tonnage handled by a trammingcrew on an 8-hr. shift varies considerably from day to day, due to the sizeof the rock drawn from the chutes and the number of interruptions causedby chutes hanging up. The record on an 8-hr. shift is 1962 tons. Theaverage for the whole mine equals 489 tons per tramming shift. A train consists of ten cars when operating with the grade in favor ofthe load, and eight when operating with the grade against the load. The sueFAcc. Course of ore from mine levels to railroad, Perseverance mine. blind end of the train is equipped with cow-bells, which are allowed todrag over the ties, giving an effective warning when a train is two or more trains are operating to one ore way, a system of signallights is used to prevent collisions, the motorman throwing in a red lightwhen passing a given station, which prevents another motorman fromproceeding to the dump until the red light is removed. Three men arerequired on the various levels to keep the cars oiled and in repair. Chute maintenance costs $ per ton, four timbermen withhelpers being required for this work. The boss chute puncher on each G. T. JACKSON 483 tramming crew and the niotorinan keep a tally of the number of carsdrawn from each stope and report to the shift boss at the end of each 14 shows the course of ore from minclevcls through ore way to theloading station. Following are detailed costs of mine tramming:
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
