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application auxiliary equipment battery belt tension bottom bottom-dump cars Canada Canadian mining companies capacity carcass Cart 20 lb chain conveyors charging stations chute conveyor haulage conveyor systems COURTESY DORR-OLIVER-LONG LIMITED designed devices diesel diesel locomotive Dominion Coal Company driving pulley dumping Elliot Lake favour feeders feet frog gauge grades Granby car Granby Granby gravity takeup grizzly gypsum haulage costs haulage equipment haulage methods haulage systems haulageways hauls headroom hopper Horsepower idler assemblies illustrated in Figure large-scale lb to 60 loading maintenance material mechanical splices metal mines mobile haulage mobile non-rail haulage normally Nova Scotia Ontario polyvinyl chloride potash rail haulage ramp rocker rocker-dump car roller rope ropeway rubber Safety bays selection shuttle cars single pulley drive slushers small-scale spacing specific steel stopes tabular orebodies tipple cars ton-mile tons track transport trolley locomotives U/C Arc underground mines usually vertical wheels width wood wood wood