. Steam shovel mining, including a consideration of electric shovels and other power excavators in open-pit mining . Table 6.—Working Dimensions of Large Revolving Shovels 225-B 175-B 150-B Pitch of boom A Dumping radius B Height of dump (dipper door open) C Level floor radius D Center to center of tracks E Radius of boom F Height of boom G Digging radius at 8 elevation H Height of cut I Radius of rear end 45°94-661-059-030-077-076-088-072-032-4 45°85-052-056-024-068-066-078-061-029-0 45°74-040-046-0l7-056-053-068-047-027-0 An ordinary railroad type shovel would often require 8 or 9cuts, with
. Steam shovel mining, including a consideration of electric shovels and other power excavators in open-pit mining . Table 6.—Working Dimensions of Large Revolving Shovels 225-B 175-B 150-B Pitch of boom A Dumping radius B Height of dump (dipper door open) C Level floor radius D Center to center of tracks E Radius of boom F Height of boom G Digging radius at 8 elevation H Height of cut I Radius of rear end 45°94-661-059-030-077-076-088-072-032-4 45°85-052-056-024-068-066-078-061-029-0 45°74-040-046-0l7-056-053-068-047-027-0 An ordinary railroad type shovel would often require 8 or 9cuts, with all the attendant changes of position of the loadinjj;track, to make an excavation that one of these great revolvingshovels could make in one large cut. Table 3 gives the dimensions, and Table 4 the workingdimensions of the small Bucyrus revolving shovels. Table 5 gives the dimensions, and Table 6 the working dimen-sions of the large Bucyrus shovels. Table 7 gives the dimensions of some medimum-sized Marionshovels. THE POWER SHOVEL 23. Iaulk 7. —SiI CIKUATIONS OP Marion ( a)M. Stripi >iN(i Steam S HOVELS 1>8 TO 1 8L0PE OF SPOIL BANK 1>4 ro 1 SLOPE OF SPOIL BANK MODEL 211 MODEL 211 2-Yard Dipper, 45 -Foot Boom 2- Yard Dipper, 45 -Foot Boom A C C D E F A C C D E F 14 29 29 17. 4 13 12 29 29 17 4 13 16 29 29 16 4 12 14 29 29 16 4 12 18 20 20 16 4 12 16 20 20 16 4 12 20 11 11 25 13 12 18 12 12 24 12 12 MODEL 231 MODEL 231 S^^-Yard Dipper, 55-Foot Boom 3K -Yard Dipper, 55-Foot Boom A C C D E F A C C D E F 20 36 36 19 4 15 18 36 36 19 4 15 22 36 36 18 4 14 20 32 32 18 4 14 24 27 27 18 4 14 22 22 22 18 4 14 26 11>^ 11>^ 29>^ 15>2 Ir 24 14 14 27 13 14 Extra Long Booms and Dipper Sticks.—To meet special orunusual requirements, the leading shovel builders are generallywilling to recommend or design machines considered best suitedto the conditions. Some requirements are best filled by machines of standarddesign, but equipped with extra long booms and dipper-h
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
