a large machine used in the surface mining process to remove overburden, or layers of earth and rock, covering a coal seam
A mining machine which drops a heavy toothed bucket on a cable from the end of a boom into the oil sand, then drags the bucket through the deposit, scooping up the sand. Once full, the bucket is raised and emptied into a windrow.
A type of excavator which has a bucket attached by wire to a long light boom or jib. The bucket excavates material by being dragged along the surface towards the machine, before being lifted into the air and loaded. Draglines usually dig below the level on which they stand.
An excavator which has a bucket facing backwards and uses a hoist rope and a haul rope to fill the bucket, which it then swings away and dumps. It sits on top of the material being excavated.
an excavating machine consisting of a rotating deck (the upper works), a base (the lower works), and a boom
an excavating machine that has a bucket attached by cables to the end of a long boom
Excavating machine used in the process of surface mining to remove overburden.
a large machine (usually track-mounted) that uses an earth-scraping bucket suspended by cables from a derrick to excavate earth or rock; often used in large scale open-pit mining
A large machine that digs oil sand from the mine pit and piles it into windrows.
A crane-like, caterpillar-mounted, excavator with a bucket suspended on a long light boom, which is dragged by a steel rope towards the machine. It can dig material well below the level at which it stands and is usually able to dump the spoil in a levelled condition.
A crane fitted with a bucket or scoop which is thrown outwards and retrieved by a drag cable arrangement.
a) Wire rope used for pulling excavating or drag buckets, and b) name applied to a specific type of excavator.
An excavating machine that uses a bucket operated and suspended by lines or cables, one of which lowers the bucket from the boom; the other, from which the name of the machine is derived, allows the bucket to swing out from the machine or to be dragged toward the machine to remove overburden above a coal seam.
An excavator with a bucket facing backwards which sits on top of the material it is excavating. It uses a pulley system to fill the bucket, which it then swings away and dumps.
A large excavation machine used in surface mining to remove overburden (layers of rock and soil) covering a coal seam. The dragline casts a wire rope-hung bucket a considerable distance, collects the dug material by pulling the bucket toward itself on the ground with a second wire rope (or chain), elevates the bucket, and dumps the material on a spoil bank, in a hopper, or on a pile.
" means a large, electrically powered, mobile machine with a large bucket suspended from the end of a long boom used in the open pit mining process."
1. A bucket-like machine for excavating and removing large quantities of soil. 2. Rope or cable used to pull things.
