Chrome | If you choose to block cookies some parts of this website may not operate. In civil engineering the smaller types are used for road and port construction. In the UK previously redundant machines were scraped, But recently 2 machines that have finished working for UK Coal (formerly British Coal Open Cast Division) have been sold and will be striped down and shipped abroad. Despite their limitations, and their extremely high capital cost, draglines remain popular with many mines, due to their reliability, and extremely low overburden (waste) removal cost. , A Working scale model of a walking dragline. Also called a "Face Shovel" This was a Bucyrus-Erie 1550-W fitted with a 65yd bucket on a 265 ft boom, and capable of digging to a depth of 150 ft. A typical dragline, with a 55 cubic metre bucket, can use up to 6 megawatts during normal digging operations. Because of this, many (apocryphal) stories have been told about the blackout-causing effects of mining draglines. A dragline bucket system consists of a large bucket which is suspended from a boom (a large truss-like structure) with wire ropes. 
If travelling medium distances, (about 30–100 km), a special dragline carrier can be brought in to transport the dragline. Dragline excavators are heavy equipment used in civil engineering and surface mining projects. A typical bucket has a volume ranging from 30 to 60 cubic metres, though extremely large buckets have ranged up to 168 cubic metres. A swing operation is then performed to move the bucket to the place where the material is to be dumped. Marvel at the minds that designed a machine the size of a mobile tower block to gouge out earth in the open cast coal mines of Northumberland.
BGS Geoheritage – images from the collections. This industrial film details the construction and operation of a huge dragline excavator, the largest of its type in Western Europe at the time. Their "Class 14" dragline was introduced in 1911 as the first crawler mounted dragline. On larger draglines, only a few extra metres may be reached. This is the largest working "Face Shovel" in preservation in the UK, 110 RB at the VET site at Threlkeld, Cumbria. The machine was scrapped as world demand for machines was such that stripping it down was not viable and the UK market had moved to the new Large Hydraulic machines, as most sites were smaller and manoeuvrability was an issue. Perhaps the next most well-known machine was the P&H 757 walking dragline known as the “Ace of Spades”, which worked at … In 1988 Page was acquired by the Harnischfeger Co., makers of the PH line of shovels, draglines, and cranes. By the skillfull manoeuvre of the hoist and the dragropes the bucket is controlled for various operations. A Variation of the same basic machine is the Front Shovel excavator also used in Civil engineering and Mining projects. The larger types are used in strip-mining operations to move overburden above coal, and for tar-sand mining. Above this distance, disassembly is generally required. The second is a key pass. More information | The hoistrope, powered by large diesel or electric motors, supports the bucket and hoist-coupler assembly from the boom. The bucket arm is pulled back to drive the bucket into the loose rock or Coal face then lifted up by the boom and the machine then swings and dumps the load usually into a large Dump truck sat at the side by opening the back of the bucket which is a hinged flap on the back, then swinging back and digging in again.