Excavation HandbookMcGraw-Hill, 1981 - 1000 halaman |
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Halaman 12-23
... shovel operation may be inferred from the well - blasted ore , the minimum angle of swing return , the ample supply ... Shovels up to about 20 - yd3 capacity. Shovels 12-23.
... shovel operation may be inferred from the well - blasted ore , the minimum angle of swing return , the ample supply ... Shovels up to about 20 - yd3 capacity. Shovels 12-23.
Halaman 12-29
... shovel work , based on good management , are summarized in the follow- ing tabulation : Delays to shovel operation Minor delays of less than 15 min duration : Time distribution min % Insufficient rock haulers 4.2 7.0 Spotting of rock ...
... shovel work , based on good management , are summarized in the follow- ing tabulation : Delays to shovel operation Minor delays of less than 15 min duration : Time distribution min % Insufficient rock haulers 4.2 7.0 Spotting of rock ...
Halaman 12-31
... shovel Hourly cost of ownership and operation : 3 - yd3 shovel ( Table 8-3 ) . 21 % of $ 454 Operator and oiler Total Direct job unit cost per cybm , $ 126.30 / 206 $ 454,000 $ 95.30 31.00 $ 126.30 $ 0.61 Shovels of larger than 20 - yd3 ...
... shovel Hourly cost of ownership and operation : 3 - yd3 shovel ( Table 8-3 ) . 21 % of $ 454 Operator and oiler Total Direct job unit cost per cybm , $ 126.30 / 206 $ 454,000 $ 95.30 31.00 $ 126.30 $ 0.61 Shovels of larger than 20 - yd3 ...
Isi
ROCK WEATHERING | 3-4 |
LANDFORMS AND GEOMORPHOLOGY | 4-4 |
OPENCUT EXCAVATIONS | 5-3 |
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Istilah dan frasa umum
alluvium average axles backhoe blasthole borrow pit brake horsepower bucket bucket loader bulldozer calculated California capacity clearing and grubbing cofferdam compaction compactor compressor conveyor cost of ownership crawler-tractor cubic yard cybm cybm/h cysm depth diameter diesel engine dipper Direct job unit dragline dredge dumping efficiency electric embankment equation estimated explosives factor fill freeway friction ft/min ft/s gal/min grade granite haul road haulage head loss heavyweight hoist hole horsepower hourly production igneous igneous rock illustrates job unit cost lb/in˛ length limestone loading machine machinery material maximum medium metamorphic rocks mi/h off-the-road open-pit mining ownership and operation percent pipe pump quarry r/min rock excavation rock formation rock haulers rock-earth rolling resistance scraper sedimentary rock shovel shown in Figure slope soft specifications Table tare weight tire tons tow-type tractor tractor-bulldozer tractor-rippers truck valve velocity water wagon weight wellpoint wheels-tires width Work-cost indicator ydł