dragline mining methods

Dragline Mining Methods Part 1 Flashcards | Quizlet

Surface Mining ... Dragline Methods Author: ACI & US EPA Region 3, Environmental Assessment & Innovation Division, Mountaintop Mining Subject: mountaintop mining, dragline methods Keywords: mountaintop,mining,dragline,methods Created Date: 10/21/1999 11:12:47 AM

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US4731941A

Method of excavating overburden from a mineral or coal deposit seam using a low wall winch component, a high wall which component and a hoe. The hoe is attached to the low wall winch component by one or more draglines and the hoe is attached to the high wall winch component by a tail line. The method includes the steps of: (i) moving the hoe by tensioning of the draglines by the low …

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World''s Biggest Dragline

bucyrus 8200 77 cubic yd 125 ton drag line, located in Center ND removes first 100-200 feet of top soil to unearth the coal, the coal creates steam and power...

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(PDF) Surface Coal Mining Methods in Australia

Overall mining sequence of a typical surface coal mine in Australia (after Westcott et. al., 2009). 2.1 Dragline method. Dragline is the predominant mach ine which is used to remove the overburden ...

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Considerations Some Technical and Business Dragline or ...

Dragline with Pre-Strip In this mining method, the overburden in excess of the dragline dig depth (termed pre-strip) is removed by other mining equipment. The pre-stri p material is excavated from future mining

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OPEN CAST MINING METHODS

 · Subject :GEOLOGYCourse :ENERGY RESOURCES AND MINERAL EXPLORATIONSKeyword : SWAYAMPRABHA

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Draglines | |

® Draglines draglines offer the lowest material removal cost per ton, consume less power and emit fewer greenhouse gases than other methods of overburden removal, making them the most productive and environmentally friendly excavators in the industry.

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DRAGLINE PERFORMANCE STUDY IN INDIAN COAL MINES

2.7 Dragline stripping methods 12 . 2.7.1 Simple sidecasting method 17 . 2.7.2 Dragline extended bench method 19 . 2.7.3 Dragline pull-back method 20 . 2.7.4 Tandem machine systems 21 . 2.8. Drilling and Blasting of Overburden for Draglines 21

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(PDF) Economical Operation & Estimation of Operating Cost ...

 · Draglines are versatile and provide a low cost mining method. In order to achieve high production and productivity of heavy earth moving machineries in …

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dragline and truck shovel mining methods.

dragline and truck shovel mining methods. Notice of Public Review and Comment Period Extension for the Spring Creek Mine LBA1 Environmental Assessment The U.S. Department of the Interior (DOI), Office of Surface Mining Reclamation and Enforcement

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Skyline Dredging & Excavating – Excavation & Mining ...

Skyline Dredging & Excavating Inc. has been dragline dredging with our Skyline Yarders since 2003. Since our company s inception we have excavated over 3.5 million tons of previously unattainable aggregates for various companies. Our Gravel Excavation methods can help you reach more aggregate without increasing your land base.

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Lecture 2: An introduction to mining

LECTURE 2: AN INTRODUCTION TO MINING. This lecture covers mining and introduces how mining generally is done, what machinery and methods are used and how ore and waste rock travel within the mine complex. Mining is done to liberate minerals from the crust of the earth. This is done in several steps. The steps differ between mines depending on ...

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US5140907A

Method for surface mining with dragline and blast casting Download PDF Info Publication number US5140907A. US5140907A US07/797,604 US79760491A US5140907A US 5140907 A US5140907 A US 5140907A US 79760491 A US79760491 A US 79760491A US 5140907 A US5140907 A US 5140907A Authority US United States Prior art keywords overburden seam

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Dragline Mining Methods Part 2 Flashcards | Quizlet

Dragline Mining Methods Part 2. STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. johannva. Terms in this set (8) Simple side casting-most common and straightforward stripping method-the dragline sits on the OB surface and …

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Topic 5: Mining Methods-Part I-Surface mining

 · Topic 5: Mining Methods-Part I-Surface mining 1. Topic 5: Mining Methods Part I-Surface mining Hassan Z. Harraz [email protected] 2010- 2011 Prof. Dr. H.Z. Harraz Presentation This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course …

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Dragline Dredging Methods

''DRAGLINE DREDGING METHODS HISTORY AND DEVELOPMENT A dragline dredge is a placer mining machine comprising two '' standard dragline shovel which travels over the ground under its separate units (see Plates I and 11). The gravel is dug by a own power usually by means of tracks (some of the large shovels are "walkers").

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Range Diagram

Range Diagram. The Range Diagram command is an interactive tool for analyzing dragline cut scenarios. This is a quick and easy way to find parameters such as pit width, or to size a dragline to fit the geology. Methods of mining include Side Cast, Extended Bench, Dozer Bench, and Spoil Bench. Output includes both drawing the sections in CAD and ...

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Dragline

 · The strip mining method continues to mine the overburden below the depth at which the area was area-stripped. Draglines or continuous excavators, which are used to strip the overburden from the lower seams, are large pieces of equipment and require large, level areas from which to work. Draglines and continuous excavators have dig depth ...

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PERFORMANCE STUDY & EVALUATION OF ELECTRICAL …

operating cost of dragline operation in various methods has been done and compared critically on case study basis. Principally, it will serve as a guide to the method employed in determining the operating cost in various methods. Draglines are versatile and provide a low cost mining method.

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Mining Excavation Methods

 · Finally, we should remember that dragline are not used to remove the coal seam. A common dragline excavation method is called the key bridges or the key blocks. Variation of this method exists depending on the equipment and the geometry of the deposit. Let''s have a look at the main steps of this method.

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Working of dragline

 · Simple CastingThis is simple method of Dragline working. In this method the Dragline is sitedon immediate OB bench above Coal and removes the OB and dumps it in thede-coaled area of previous cut.The width of the cut normally less than 40 m so that re-handling of the OB willbe negligible. The method is extremely suitable for singly thin seam mining.

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A model for direct dragline casting in a dipping coal-seam

coal mining2. Strip mining, where draglines are principal earthmovers, has a significant contri-bution in coal produced by practising surface mining methods. Excluding the former Soviet Union, dragline applications are concentrated in the following countries: the United States of America (USA), Australia, Republic of South Africa, Canada and India.

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Preliminary Economics of Mining a Thick Coal Seam by ...

A general overview is presented relating to cost estimation for conventional dragline, shovel-truck, and scraper mining systems. A short-range equipment selection and long-term evaluation of mining a thick coal seam by each method also are considered. Cost analyses are based on 1977 equipment prices, wage rates, and associated mining costs.

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What is a drag line?

The phosphate strip mining is accomplished by various methods of stripping the materials from the ground as illustrated above. The phosphate industry relies heavily on the dragline excavator to keep moving large amounts of overburden to mine the phosphate rock just beneath the surface.

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Draglines

Draglines. Draglines. P&H draglines 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 customer-inspired innovations that help optimize rugged, reliable and safe performance. The advanced P&H Centurion electrical ...

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Surface Coal Mining Methods in Australia

Mining Methods 6 Fig. 3. Overall mining sequence of a typical surface coal mine in Australia (after Westcott et al., 2009). 2.1 Dragline method Dragline is the predominant mach ine which is used to remove the overburden and expose the coal when the deposit s characteristics match the draglines physical capabilities. Once

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"Dragline Digging Methods in Australian Strip Mines

Publication Details. This conference paper was originally published as Mirabediny, H and Baafi, EY, Dragline Digging Methods in Austra.lian Strip Mines - A Survey, in Aziz, N (ed), Coal 1998: Coal Operators'' Conference, University of Wollongong & the Australasian Institute of Mining …

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The Four Main Methods of Mining

 · Strip mining is done only when the ore body is in close proximity to the surface. Open-pit mining – Open-pit mining is the method in which minerals or rocks are extracted from the Earth via an open pit or borrow. Mountaintop removal mining – Mountaintop removal mining (MTR) is done by mining coal seams underneath mountaintops.

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[PDF] Fracture mechanics of mining dragline booms ...

Mining draglines are large mining machines which have a booms of about 100 m in length. The booms are tubular structures made up of three large chords connected by smaller lacing tubes. There is a regular cracking phenomenon at the welds which means that the cracking must be remotely detected, exactly located and repaired. This paper describes the cracks which grow in the weld joints (called ...

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Dragline or truck shovel?

 · Draglines typically can offer a low cost waste removal mining method but are less flexible and have a higher capital cost. Truck/shovel fleets on the other hand are far more flexible with lower capital but generally higher unit costs. "The deployment of draglines and truck/shovel fleets can be varied so that competitiveness (lower costs) can ...

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Major Mines & Projects

Mining Methods. Truck & Shovel / Loader; Dragline; Highwall; Backfill; Source: p.69. Summary: Dawson mine is a large open-cut coal mining operation in Queensland that historically had been operated as a strip mine, with multiple draglines exposing coal in a westerly direction and dumping spoil to the east. In response to a shortage of dump ...

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Dragline Digging Methods in Australian Strip Mines

Dragline Digging Methods in Australian Strip Mines - A Survey. Open cut mining in Australia is facing the greatest challenge in its hilstory in attempting to compete not only with other operations internationally, but also with underground operations domestically. Most flat dip and shallow depth surfacemineable coal reserves have been depleted ...

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DRAGLINE MINING SYSTEMS

Dragline Mine Design. Systematic mine planning process, and mining limit assessment using economic ranking criteria. Dragline Key Components. Typical configuration, dig & dump cycle, understanding dragline working envelope, and dragline buckets. Dragline Operating Methods. Range diagrams, pit layout, boxcuts, single

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Methods for evaluating effect of operators on drag line ...

METHODS FOR EVALUATING EFFECT OF OPERATORS ON DRAGLINE ENERGY EFFICIENCY by MARY AM ABDI OSKOUEI A THESIS Presented to the Faculty of the Graduate School ofthe MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE IN MINING ENGINEERING 2013 Approved by Kwame Awuah-Offei, …

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Dragline Presentation

Surface Mining ... Dragline Methods Author: ACI & US EPA Region 3, Environmental Assessment & Innovation Division, Mountaintop Mining Subject: mountaintop mining, dragline methods Keywords: mountaintop,mining,dragline,methods Created Date: 10/21/1999 11:12:47 AM

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Systems simulation for dragline selection in open cast mines

Various stripping methods have been simulated and different alternatives have been analysed. The results of part alternatives with single dragline operation and extended bench method are shown in Table 1. Mining section of one alternative is shown in Figure 2 as an example, while the coal pillar size is shown in Figure 3.

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Dragline

Surface Coal Mining Methods in Australia

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Major Mines & Projects

Following the landslide, mining has been accomplished by a combination of dragline, dozer, and truck and loader operations, depending on the depth and material being mined. The overburden, or rock that lies above the coal seams to be mined, is drilled and blasted to break up the rock to allow it to be moved using the mining equipment.

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Chapter 9 Mining, transportation, and storage

 · Area mining is the major mining method in Texas. Mining is done by dragline sidecasting or by removing overburden with scrapers. The average stripping ratios are less than 7 m3 per tonne of lignite, the maximum being about 13 m3 [13]. Area mining removes the topsoil and overburden in box cuts, which typically are strips about 1.6 km long and 30 ...

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