Information Circular1950 - Mines and mineral resources |
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... cars . These turn - outs later are used for diamond - drill stations from which to investigate the walls for parallel structures . DEVELOPMENT AND MINING Development The present development of the Surprise ore shoots is by an incline ...
... cars . These turn - outs later are used for diamond - drill stations from which to investigate the walls for parallel structures . DEVELOPMENT AND MINING Development The present development of the Surprise ore shoots is by an incline ...
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... cars at drift and Trains of cars are hauled by electric locomotives to or to waste loading pockets at the shaft , where the The mine equipment includes 5 loaders and 7 locomotives . nd exploration headings are worked in general on the ...
... cars at drift and Trains of cars are hauled by electric locomotives to or to waste loading pockets at the shaft , where the The mine equipment includes 5 loaders and 7 locomotives . nd exploration headings are worked in general on the ...
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... cars at drift and crosscut headings . Trains of cars are hauled by electric locomotives to waste - ill raises or to waste loading pockets at the shaft , where the loads are dumped . The mine equipment includes 5 loaders and 7 ...
... cars at drift and crosscut headings . Trains of cars are hauled by electric locomotives to waste - ill raises or to waste loading pockets at the shaft , where the loads are dumped . The mine equipment includes 5 loaders and 7 ...
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... cars are loaded with stoped ore from standard timber chutes , hauled to the shaft , and dumped in shaft pockets . A 3 - ton skip is loaded from the pockets and hoisted to the collar , where it dumps automatically into a bin . Another ...
... cars are loaded with stoped ore from standard timber chutes , hauled to the shaft , and dumped in shaft pockets . A 3 - ton skip is loaded from the pockets and hoisted to the collar , where it dumps automatically into a bin . Another ...
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... cars at drift and crosscut headings . Trains of cars are hauled by electric locomotives to waste - fill raises or to waste loading pockets at the shaft , where the loads are dumped . The mine equipment includes 5 loaders and 7 ...
... cars at drift and crosscut headings . Trains of cars are hauled by electric locomotives to waste - fill raises or to waste loading pockets at the shaft , where the loads are dumped . The mine equipment includes 5 loaders and 7 ...
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13 north 37 south anthracite anthracite mines bituminous coal bituminous-coal and lignite blasting blends Bureau of Mines carbon dioxide carbon monoxide cars catalyst cent mines cent circuit coal bed Coal Mine Inspection coal mines coal-mine inspectors coke concentrate conditions and practices cost County cut and fill D.C. Approval drilling dust allaying electric engineers equipment explosions feet Figure fill stoping fire area fiscal year 1949 fuel gas mask gasification Gunnison County haulage high-volatile Highland Surprise holes hydrogen inches installed investigation Joy Manufacturing June 30 lignite lignite mines loading machine main east entry mechanical method mill mineral mines cent mines Mines Information Circular motor operations oxygen Per-No percent Pine Creek Pittsburgh plant Pocahontas portal properties reports respirators rock dust roof support samples seals shaft SHOSHONE COUNTY shrinkage stoping steel surface surface magazine switch synthesis gas tests timber tons Total tunnel Type underground ventilation volts zinc