For many years it was the biggest
walking dragline excavator in Europe.
The addition of the
walking dragline allowed Usibelli to ramp up production in the 1980s and is an integral part of today's operations, Brophy says.
It has trucks with a 150-ton capacity and a
walking dragline - the largest land-based machine in Alaska - with a bucket that holds 33 cubic yards of material.
Another new introduction is the P&H 9020
walking dragline, which incorporates improved A-frame and front end geometry, precision gearing, and planetary swing and propel transmissions.
3]) capacity, whereas at Stobswood, the latest large site, overburden is stripped by the P&H 757
walking dragline 'Ace of Spades', Europe's largest
walking dragline with a bucket capacity of 65 [yd.
An AC dragline conversion is no longer a new, unproven concept, as Flanders has now converted three
walking draglines from DC to AC, using its in-house designed active front-end (AFE) drive system.
Bucyrus International has built heavy excavating machinery for over a hundred years: it began in 1880 building equipment and became the leading supplier of draglines, shovels and drills for the mining industry, purchasing competitors and today building about 90 percent of the
walking draglines in existence.
ft of manufacturing space, Bucyrus manufactures
walking draglines, electric mining shovels and/or rotary blast hole drills.
Three
walking draglines, expected to begin digging by 2001 at Coal India Ltd.
At its Mildred Lake mine, Syncrude uses two 8750
walking draglines made by Marion Power Shovel, and two 2750
walking draglines made by Marion's parent company, Bucyrus International Inc.
have had to consider new mining concepts, as the large
walking draglines currently used for overburden stripping run into rehandling problems because of their limited working range and excavating depth.
The Australian black coal industry uses some 60
walking draglines to uncover around 35% of all black coal mined.
