The surface mining machine discussed in this paper will dig through areas up to 160 ft deep. A dragline was selected for this application after considerable study of the relative merits of shovels and draglines; and a single large machine was selected in preference to two smaller units.The machine features hydraulic walking equipment of a new design. Horsepowers and pulls on the drag and hoist machinery are larger than on any draglines currently in operation. Six motor generator sets convert 13,800 v incoming a-c power to d-c power with thyristor control.The boom is subjected to a combination of primary and secondary loads and required special design treatment.
Development and Manufacture of a 220 Cu Yd Walking Dragline
Sae Technical Papers
Farm, Construction and Industrial Machinery Meeting ; 1967
1967-02-01
Aufsatz (Konferenz)
Englisch
Engineering Index Backfile | 1958
Engineering Index Backfile | 1942
|Dragline sample acquisition mechanism
NTRS | 1970
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