Ore Mining Methods: Comprising Descriptions of Methods of Support in Extraction of Ore, Detailed Descriptions of Methods of Stoping and Mining in Narrow and Wide Veins and Bedded and Massive Deposits Including Stull and Square-set Mining, Filling and Caving Methods, Open-cut Work and a Discussion of Costs of StopingJ. Wiley, 1910 - 219 pagina's |
Inhoudsopgave
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Overige edities - Alles bekijken
Ore Mining Methods: Comprising Descriptions of Methods of Support in ... Walter Richard Crane Volledige weergave - 1910 |
Ore Mining Methods: Comprising Descriptions of Methods of Support in ... Walter Richard Crane Volledige weergave - 1910 |
Ore Mining Methods: Comprising Descriptions of Methods of Support in ... Walter Richard Crane Volledige weergave - 1910 |
Veelvoorkomende woorden en zinsdelen
15 feet 50 feet advantage Analysis angle of repose applicable arch pillars blasting breast stoping broken caps carried cars caved ground caving methods Chemistry CHUTE RAISES Comstock Lode considerable cost of mining cost of stoping cross-cuts depth Descriptive Geometry disadvantages district Douglas Island drilling and blasting drills driven Electrolysis employed Engineering excavation extending face floor foot-wall formed handling height Homestake mines inclined labor lagging Lake Superior Large 12mo Large outputs loaded lode low-grade main level man-ways Manual massive deposits material MELAPHYRE method of mining method of procedure methods of stoping mill holes milling method mineral moderately operations ore-body overhand stoping pits placed posts practically props QUARTZITE removed roof scrapers Section sets shaft shale side stoping square-sets steam shovels Strength of Materials stripping stulls SUB-LEVEL subs surface thickness timber tion top-slice Treatise underground underhand stoping usually vertical wall-rock wide veins width winzes