Standing nearly 22 stories tall and weighing as much as 10,000 Miatas, this is the story of Big Muskie, the biggest, mostbadass walking dragline ever made. So keep reading to find out how it was ...
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machine if permissible temperatures are exceeded. • Each side independently driven, but electrically synchronized, monitored and adjustable via dragline PLC. • Shoe incorporates ball swivel mounting to accommodate variable ground conditions. • Ability to propel machine up and down 10% grade and transverse across 5% grade.
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Ursa Major in 2009. The Ursa Major (lit. Great Bear) at Black Thunder Coal Mine, Wyoming, is the largest dragline excavator currently in use in North America and the third largest ever built. [1] [2] It is a BucyrusErie 2570WS model and cost US50 million. The Ursa Major was one of five large walking draglines operated at Black Thunder, with ...
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Horizontal Tandem Operation. In the horizontal tandem operation (Fig. 1), both the draglines are deployed on the same bench for a fast rate of advance and coal exposure [13, 14].The cut width taken by the draglines will be wider depending upon the operating radius of the draglines [].The leading dragline is deployed on the highwall side and provides a key cut toward the highwall, and after ...
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Producing coal for domestic thermal energy production and for export to global markets, the dragline excavator is an essential component of the mine's openpit mining. It is used in combination with drilling and blasting and dozers to expose the seam before wheel loaders and dump trucks are deployed in extensive load and haul operations.
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The present paper is an endeavor to compute inherent availability of dragline machine and critically analyze reliability and maintainability of dragline's subsystems in one of the major open cast coal mines in India. ... 38 metre • Suspended load dump height • Bucket characteristics = seconds • Operator skills • Minimizing ...
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Quarry Mining Machines. Bucket Wheel Excavator, Dragline Excavator, Dragline Excavator, Track Drilling Machine, Biggest Hydraulic Mining Excavator Large Quarry Dump Truck. ... a huge dragline strips overburden to reach the lignite seam in south Texas to provide local base load energy for Texas power plants, along access road to I 37 in Atascosa ...
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The PH 9020C dragline offers a bucket capacity of 75 117 yd3 and a boom length of 300 405 feet. ... Aframe engineered to effectively manage load forces ... Track your machine's performance to support efficient operation and maintenance activities. The Centurion control system utilizes smart electronics to monitor dragline operation.
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The problem stemmed from a preexisting deficiency of the OEM design in this area and the accumulation of fatigue damage through a long service for the machine. Further, in an effort to increase production, the mine was intending to increase the suspended load and was concerned about further exacerbating the problems in this area.
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The Walking Mechanism on a preserved BucyrusErie 1150 dragline in the UK. 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 earthmoving machine, weighing nearly 13,000 tonnes and standing nearly 22 stories tall.
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It was detected from failure statistics that operations of Dragline1 and Dragline2 were halted for 938 and 903 times due to failures, yielding total breakdown duration of 13,954 and 16,471 h, respectively. Quantitative contribution of each subsystem to maintenance numbers and maintenance breakdowns can be viewed in Figure 2.
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Sporting flags representing the United States, Alabama, and Vietnam POWMIAs, Mr. Tom is a walking dragline with two sledlike feet that move it forward about 13 feet at a time. The dragline ...
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The Marion Power Shovel Company (established in 1880) built its first walking dragline with a simple singlecrank mechanism in 1939. Its largest dragline was the 8950 sold to Amax Coal Company in 1973. It featured a 150cubic yard bucket on a 310foot boom and weighed 7,300 tons. Marion was acquired by Bucyrus in 1997.
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The dragline is one of the most energyintensive equipments in surface coal mines. With high production rate and low cost of operation, draglines are commonly used for removing large amounts of overburden to expose coal seams for extraction. Draglines consume about 1530% of total mine energy consumption. Improving dragline energy efficiency ...
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Dragline: Dragline mining is the most costeffective technology for the bedded deposits and is the firstchoice technology for large opencast of 32 draglines are in use in Coal India Ltd. of which maximum no. of 23 are in NCL. Purchase Orders for 5 nos. 24/96 Dragline amounting to Rs 2400 Crores
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Coal is the most abundant fossil fuel on Earth. Its predominant use has always been for producing heat energy. It was the basic energy source that fueled the Industrial Revolution of the 18th and 19th centuries, and the industrial growth of that era in turn supported the largescale exploitation of coal deposits. Since the mid20th century, coal has yielded its place to petroleum and natural ...
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Layout for the alternative, gearless, AC dragline option is illustrated in Fig. 5. The number of motors in either DC or AC dragline depends on size and mechanical design of machine. Table I shows ...
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42 to 60 m 3 (55 to 80 yd. 3) bucket capacity range. 84 to 107 m (275 to 350 ft.) boom length range. PH draglines from have a solid reputation and proven performance in the industry, with boom lengths and bucket capacities available to meet your specific requirements. Our draglines are built with customerinspired innovations that help ...
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Type the code from the image. Achieving high productivity from large capital equipment items such as draglines depends on consistent fragmentation and muckpile presentation to reduce rehandle and unnecessary movements. By careful planning and blast design, cast to final spoil can be maximised without increasing the risk of flyrock or overpressure.
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Move levers, depress foot pedals, and turn dials to operate power machinery, such as power shovels, stripping shovels, scraper loaders, or backhoes. Set up or inspect equipment prior to operation. Become familiar with digging plans, machine capabilities and limitations, and efficient and safe digging procedures in a given application.
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Dragline is highly capital intensive equipment to procure, operate and maintain in any surface mining operation. Given this, every second of operation of this capital intensive equipment is absolutely important. As such, it is imperative to optimize the overall cycle time of this equipment in order to reap the benefits of this equipment to the fullest extent. Even a small improvement in the ...
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The Big Muskie, a model built by BucyrusErie of Milwaukee, went to work uncovering coal in May 1969, and this is the 50th anniversary of its startup. The 14,000ton machine with a 220 cubic yard bucket was retired in 1991. For those of us who grew up in East Central Ohio, large strip mining machines were not uncommon.
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I don't think they ran out of coal. In 1999, the US Army Corps of Engineers got caught cheating and eventually quit granting mining permits because of environmental impact issues. [youtube comments] It appears that through the magic of bankruptcies, the coal corporations are dodging pensions, health plans and site cleanup. "Today, Hobet is ...
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The dragline sits on the top of the overburden bench, usually 50 m or so wide on the highwall side and excavates the material in front of itself to dump it on the strip's low wall or spoil side to uncover the coal seam. A dragline can easily dump the excavated overburden materials to a distance of around 100 m from the machine.
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CBET01 301P. The size of the dragline is based on the capacity of the drag bucket. A 15 yd dragline has a bucket capacity of 15 yd 3 . Typically draglines are in the range of 60 150 yd. The largest one ever built had a bucket capacity of 220 yd 3 . It could fill the bucket, swing it to the dump point nearly 300' from the machine, dump ...
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CENTER A coal mining company in Center commissioned a 31 million dragline Monday and is about six weeks from putting the massive coal miner to use. BNI Coal hosted the ceremony at its Center Mine.
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Draglines remove dirt to expose coal and other minerals underneath. Some of the biggest machines can lift several hundred tons in a single scoop, and the bucket alone is about the size of a twocar garage. The machine house is 100 x 118 ft. with a 350 ft. boom and currently uses a 100 CY bucket. The PH 9020 has only been in operation since ...
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A dragline is the largest mobile equipment on earth, and it is called the "kingpin" of any mine site. In this present investigation, a case of premature failure of a coalhandling dragline is discussed. Failure occurred in a linked component known as "thimble," which connects the Aframe and the vertical mast of the dragline. The thimble was broken into two halves and caused the entire ...
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The Armstrong AC dragline is not the first ACpowered dragline. It is, however, the first AC dragline retrofit operating in the —the country that has the most draglines in operation. The 23yd 770 is a small machine with a 215ft boom, but the technology is scalable. Not long after the machine was commissioned, the mine began to see results.
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The next five pictures below are pictures of Page Draglines that have been restored or were being restored. The next two are pictures of the BE 770 dragline that was restored and worked the Creek Mine. The last picture is a picture of the BE 770 that has been electronically altered. Hope you enjoyed all. .
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This paper presents a method for measuring the inbucket payload volume on a dragline excavator for the purpose of estimating the material's bulk density in real time. Knowledge of the payload's ...
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Drilling machines are diesel or electrically powered. Frontend loaders are rubber tired tractors equipped with a large bucket that is used to load soil, rock, and coal into trucks to be transported to a spoil disposal area or to a coal preparation plant for further processing. Hydraulic backhoes are equipped with a bucket at the end of a large ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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