Excavation HandbookMcGraw-Hill, 1981 - 1000 halaman |
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Halaman 11-21
... production of the scraper spread . The seismic shock - wave velocity of the weathered granite is 4000 ft / s . Figure 11-17 gives for 4000 ft / s an hourly production of 1300 cybm and a unit cost of $ 0.092 / cybm . One may use Figure ...
... production of the scraper spread . The seismic shock - wave velocity of the weathered granite is 4000 ft / s . Figure 11-17 gives for 4000 ft / s an hourly production of 1300 cybm and a unit cost of $ 0.092 / cybm . One may use Figure ...
Halaman 12-57
... production for each dragline is 239 cybm . The total hoist is 35 ft and the swing - return angle is 180 ° . Table 12-21 gives a 0.48 - min cycle time . An estimate for hourly production , based on a 40 - min working hour , or 67 percent ...
... production for each dragline is 239 cybm . The total hoist is 35 ft and the swing - return angle is 180 ° . Table 12-21 gives a 0.48 - min cycle time . An estimate for hourly production , based on a 40 - min working hour , or 67 percent ...
Halaman 12-66
... Production is 66 cybm / h at a unit cost of $ 1.25 . In Figure 12-46 , the efficiency is 67 percent . The production rate is 326 cybm / h and the unit cost is $ 0.23 . The low - production - high - cost job is one of loading in urban ...
... Production is 66 cybm / h at a unit cost of $ 1.25 . In Figure 12-46 , the efficiency is 67 percent . The production rate is 326 cybm / h and the unit cost is $ 0.23 . The low - production - high - cost job is one of loading in urban ...
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/in² 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 yd³