It can be said that the modern dragline
era began in the late 1960s when one of the major dragline
suppliers took a fresh engineering approach and offered the first in a new series of draglines
The project, which was three years in the making, included moving draglines
at Luminant's Big Brown mine, Kosse mine and Martin Lake mines to newly developed mining areas, including its still-new Liberty complex.
"NA Coal has experience in Page, Bucyrus and Marion draglines
, and this Page machine will be able to mine the whole coal reserve."
The success of the project will be judged on the physical uptake of automation technologies across mine sites as project partners use research outcomes for commercial development on draglines
Nearly 60 self-propelled modular transporters, trailers powered by up to nine 600-horsepower engines, were used to move the draglines
the smallest weighing six million pounds and the two largest weighing 13 million pounds each.
are not only some of the most efficient tools for moving material, they are likely the oldest continuously operating machines in the mining business.
don't last forever; it just seems that way.
All species of spider putatively produce silk draglines
as they move through their environment.
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
like Big Geordie can take days at a time.
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.'s Dudhichua and Nigahi mines, will use General Electric motor-generator sets for powering drag, hoist, and swing motions.