Huge Manitowok 4600 Heavy lift Dragline at the SNS Project, 2005. "Manny" is what this dragline is called. "Manny is short for Manitowok and is so big, I can't fit it in on the picture..." Manny over decades came from the Nevada Test Site, then to Lawrence Livermore National Laboratory in California, now at to Oakridge, Tennessee, ORNL. All are United States Department of Energy sites.

Dragline excavation systems are heavy equipment used in civil engineering and surface mining. In civil engineering the smaller types are used for road and port construction. The larger types are used in strip-mining operations to extract coal and these are amongst the largest mobile equipment (not water-borne), and weigh in the vinicity of 2000 metric tonnes. Image File history File links The huge drag line called Manny , Huge Manitowok 4600 Heavy lift Dragline at the SNS Project 2005 So big I could not fit the picture in! LOL File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this... Image File history File links The huge drag line called Manny , Huge Manitowok 4600 Heavy lift Dragline at the SNS Project 2005 So big I could not fit the picture in! LOL File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this... April 2005 aerial photo of the SNS site, Oak Ridge, Tennessee, USA. The Spallation Neutron Source (SNS) is an accelerator-based neutron source being built in Oak Ridge, Tennessee, USA, by the U.S. Department of Energy (DOE). ... November 1951 nuclear test at Nevada Test Site - Test is shot Dog from Operation Buster, 21 kilotons. ... Aerial view of the lab and surrounding area. ... Jump to: navigation, search State nickname: The Golden State Other U.S. States Capital Sacramento Largest city Los Angeles Governor Arnold Schwarzenegger (R) Senators Dianne Feinstein (D) Barbara Boxer (D) Official languages English Area 410,000 km² (3rd)  - Land 404,298 km²  - Water 20,047 km² (4. ... Oak Ridge National Laboratory (ORNL) is a multiprogram science and technology national laboratory managed for the United States Department of Energy by UT-Battelle, LLC. ORNL is located in Oak Ridge, Tennessee, near Knoxville. ... The United States Department of Energy (DOE) is a Cabinet-level department of the United States government responsible for energy policy and nuclear safety. ... An excavator Engineering vehicles are heavy-duty vehicles, specially designed for executing engineering tasks. ... Jump to: navigation, search In modern usage, civil engineering is a broad field of engineering that deals with the planning, construction, and maintenance of fixed structures, or public works, as they related to earth, water, or civilization and their processes. ... The El Chino Mine located near Silver City, New Mexico is an open-pit copper mine Mining is the extraction of valuable minerals or other geological materials from the earth, usually (but not always) from an ore body, vein, or (coal) seam. ... Jump to: navigation, search In modern usage, civil engineering is a broad field of engineering that deals with the planning, construction, and maintenance of fixed structures, or public works, as they related to earth, water, or civilization and their processes. ... This page is related to transport; you may be looking for the 2002 Bollywood movie Road. ... Strip mining is the practice of mining a seam of mineral ore by first removing all of the soil and rock that lies on top of it. ... Coal is a fossil fuel extracted from the ground by deep mining, coal mining (open-pit mining or strip mining). ... A tonne, sometimes known as metric ton in American English, (symbol t) is a unit of mass. ...

A dragline bucket system consists of a large bucket which is suspended from a boom (A large truss like structure). The bucket is maneuvered by means of a number of ropes and chains. The hoistrope, powered by large diesel or electric motors, supports the bucket and hoist-coupler assembly from the boom. The dragrope is used to draw the bucket assembly horizontally. By skillful maneuver of the hoist and the dragropes the bucket is controlled for various operations. A schematic of a large dragline bucket system is shown below. Truss bridge for a single track railway, converted to pedestrian use and pipeline support. ... Jump to: navigation, search Diesel fuel is a specific fractional distillate of fuel oil (mostly petroleum) that is used in a diesel engine invented by German engineer Rudolf Diesel, and perfected by Charles F. Kettering. ... Jump to: navigation, search Electric motors of various sizes. ...

Image File history File links This image was taken from the cover of the Office of Surface Mining publication [1] and annotated by me. ...

Operation

In a typical cycle of excavation, the bucket is positioned above the material to be excavated. The bucket is then lowered and the dragrope is then drawn so that the bucket is dragged along the surface of the material. The bucket is then lifted by using the hoist rope. A swing operation is then performed to move the bucket to the place where the material is to be dumped. The dragrope is then released causing the bucket to tilt making the material in the bucket to fall down. This is called a dump operation.

Draglines in mining

A large dragline system used in the open pit mining industry costs approximately US$20-50 million. A typical bucket has a volume ranging from 30 to 60 cubic metres (Extremely large buckets range up to 150 cubic metres). The length of the boom ranges from 45 to 100 metres. In a single cycle it can move up to 450 metric tonnes of material. The El Chino mine located near Silver City, New Mexico is an open-pit copper mine Open-pit mining refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow. ... The United States dollar is the official currency of the United States. ... The metre, or meter (symbol: m) is the SI base unit of length. ...

A notable feature of mining draglines is that they are not fuel powered like most other mining equipment. Their power consumption is so great that they have a direct connection to the high-voltage grid at 11 kV. Many (possibly anecdotal) stories have been told about the blackout-causing effects of mining draglines. For instance, there is a long-lived story that, back in the 1970s, if all 7 of Peak Downs (a very large coal mine in central Queensland, Australia) draglines turned simultaneously, they would black-out all of North Queensland. For the workstation, see SGI Fuel. ... The difference between high voltage and low voltage depends on the situation and on the field of science or industry involved. ... Jump to: navigation, search The 1970s in its most obvious sense refers to the decade between 1970 and 1979. ... Jump to: navigation, search Motto: Audax at Fidelis (Bold but Faithful) Nickname: Sunshine State/Smart State Other Australian states and territories Capital Brisbane Government Governor Premier Const. ...

In all but the smallest of draglines, movement is accomplised by 'walking' using pontoons, as caterpillar tracks place too much pressure on the ground, and have great difficultly under the immense weight of the dragline. Maximum speed is only up to a few hundred metres per hour. If travelling medium distances, (about 30-100 km), a special dragline carrier can be brought in to transport the dragline. Above this distance, disassembly is generally required. A pontoon boat, like this small pleasure boat, typically floats and balances by means of two pontoons oriented in the direction of travel. ... Caterpillar tracks are large (modular) tracks used on tanks, construction equipment and certain other off-road vehicles. ...

Limitations

The primary limitations of draglines are their boom height and boom length. This limits where the dragline can dump the waste material. Inherent with their construction, a dragline is most efficient excavating material below the level of their tracks, a dragline is not suitable to load piled up material (like a wheel loader can). Efficiency is the capability of acting or producing effectively with a minimum of waste, expense, or unnecessary effort. ... A loader clearing a landslide. ...

Despite their limitations, and their extreme capital cost, draglines remain popular with many mines, due to their reliability, and extremely low waste removal cost.

Draglines have different cutting sequences. The first is the side cast, method using offset benches, this involves throwing the overburden sideways onto blasted material, to make a bench. The second is a key pass, this pass cuts a key at the toe of the new highwall, it also shifts the bench further towards the low-wall, this may also require a chop pass if the wall in blocky. A chop pass involves the bucket being dropped down onto a angled highwall to scale the surface. The next sequence is the blocks pass, this is the slowest operation however moves most of the material. It involves using the key to access to bottom of the material to lift it up to spoil or to an elevated bench level. The final cut if required is a pull back, this pulls material back further to the low-wall side.

Examples

The British firm of Ransome and Rapier produced a few large (1400-1800 ton) excavators, the largest in Europe at the time. Power was from internal combustion engines driving generators. One, named SUNDEW, was used in a quarry from 1957 to 1974. After its working life at the first site in Rutland was finished it walked 13 miles to a new life at Corby, the walk took 9 months. Rutland is traditionally Englands smallest county and is bounded on the west and north by Leicestershire, northeast by Lincolnshire, and southeast by Northamptonshire. ... Corby is an industrial town and a local government district located 8 miles north of Kettering in Northamptonshire, England. ...

Smaller draglines were also commonly used before hydraulic machines become widespread. Firms such as Ruston and Bucyrus made models such as the RB10 which were popular for small building works and drainage work. Several of these can still be seen in the English Fens of Cambridgeshire, Lincolnshire and parts of Norfolk) usually associated with drainage pumping engines. Ruston may refer to: Ruston, Louisiana Ruston, Washington Ruston, engine builder in Lincoln, England This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Bucyrus is the name of some places in the United States of America: Bucyrus, Kansas Bucyrus, Ohio This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... The Fens may also refer to the Back Bay Fens, park in Boston, Massachusetts. ... Cambridgeshire (abbreviated Cambs) is a county in England, bordering Lincolnshire to the north, Norfolk to the northeast, Suffolk to the east, Essex and Hertfordshire to the south, and Bedfordshire and Northamptonshire to the west. ... Jump to: navigation, search Lincolnshire (abbreviated Lincs) is a county in the East Midlands of England. ... For alternative meanings see: Norfolk (disambiguation) Norfolk (pronounced NOR-fk) is a low-lying county in East Anglia in the east of southern England. ...

The coal mining dragline known as Big Muskie, owned by the Central Ohio Coal Company (a division of American Electric Power), was the world's largest mobile earth-moving machine, weighing nearly 13,000 metric tons and standing nearly 22 stories tall. It operated in the U.S. state of Ohio from 1969 to 1991, and was powered by 13,800 volts of electricity. The GEM of Egypt (GEM standing for "giant excavating machine" and Egypt referring to the Egypt Valley in eastern Ohio where it was first put to use), which operated from 1967 to 1988, was of comparable size.

Big Brutus was at one time the second largest dragline shovel, and remains on display at the Big Brutus museum in West Mineral, Kansas. A home page for Big Brutus, Inc. ... West Mineral is a city located in Cherokee County, Kansas. ...

History

The original Dragline was invented by Henry Harnischfeger and Alonzo Pawling, whom co-founded P&H Mining Equipment in 1884. Huge Manitowok 4600 Heavy lift Dragline at the SNS Project, 2005. ... Henry Harnischfeger, who co-founded P&H Mining Equipment with Alonzo Pawling in 1884, was born in Salmunster Kreischlichtern, Hessen Nassau, a very old town in Germany on July 10, 1855. ...

References

K. Pathak, K. Dasgupta, A. Chattopadhyay, "Determination of the working zone of a dragline bucket - A graphical approach", Doncaster, The Institution of mining engineers, 1992.

Peter Ridley, Peter Corke, "Calculation of Dragline bucket pose under gravity loading", Mechanism and machine theory, Vol. 35, 2000.