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Determination of Ore Reserves
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advance ANFO angle arch Australia bedded deposits belt bench blasting block caving borehole Broken Hill broken rock bucket cent coal mines compressive continuous miner conveyor core cost cut and fill depth dragline draw points dredge drilling drive dump electric entries equipment excavation exploration floor footwall geological give gossans ground haul haulage height holes hydraulic ilmenite joints LHD machines lift load longwall face longwall mining low grade maximum measured mechanised metres mineral sands mining engineer mining methods Mount Isa mounted National Coal Board necessary normal open pit open pit mining open stoping operations orebody overburden panel pillar mining plane pressure produced roadway rock bolts roof samples sand shaft shales shallow shortwall shovel shuttle car slope South Wales square set strata strength stress sublevel subsidence surface tailings thick tion tonnes trucks U.S. Bureau underground usually ventilation vertical wall waste width zone