Dragline Mining Methods

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

'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 caterpillar tracks (some of the

mining (see Figure 1). Each dragline is a self-contained excavation system that is able to remove and dispose of the overburden without the assistance of other min-ing machines. In surface mining, draglines are employed in excavating a long strip of overburden sitting above the target mineral reserve. Figure 2 shows the typical geometric structure of a surface coal mine without the dragline. A

Dragline used in surface mining is heavy equipment. They are mostly built site for strip on-mining operations to remove overburden and coal and they are largest mobile land machine ever built. It consists of large bucket which is suspended from a boom with wire ropes. The bucket is maneuvered by means of ropes and chains. The hoist rope is powered by electric motors and

1.2 Dragline mining in India 2 1.3 Goal 3 1.4 Objectives 3 considerable portion of coal is produced by surface mining methods. Regarding the economics of scale extraction methods are highly mechanized and equipment with huge capacity are utilized. Draglines have been abundantly used in coal mining for decades, either as stripper or stripper and coal extractor. As this equipment possesses

Open cast (strip mining) method in surface mines has obtained rapid development worldwide in recent years. In China, there are a number of mining areas, the occurrence conditions of which are suitable for application of open cast method with draglines. The open cast method in surface mines combines overburden excavation, haulage and dumping operations with one equipment. The annual stripping

eir primary method of wa ste removal such as draglines only, draglines with pre-strip or truck/shovel on ly. The following paragraphs briefly describe the main features of each method. Draglines Draglines are the lowest cost waste removal equipment but are generally restricted to:

30.01.2014· Two of the main dig methods used in the dragline mining industry are the “Offline In-Pit Bench” Method, and the Jensen and Curtis “Spoil-Side” Method. In this video we compare the two methods using the same

19.09.1998· 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 limitations. Area

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

Draglines aren't suitable for loading piled up material. Despite their limitations and high capital cost, draglines remain very popular with phosphate rock mining industry, due to their very low waste removal cost, performance, and reliability. Multiple Stripping Sequences. Draglines also use multiple stripping sequences or "methods". Each of

Dragline Mining Methods Part 1. STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. johannva. Terms in this set (8) Single seams can be stripped using a single dragline or multiple machines and the method used depends on:-bank height-nature of overburden-highwall angle -spoil pile angle of repose -stability-dragline dimensions. Single seam dragline stripping methods

mining (see Figure 1). Each dragline is a self-contained excavation system that is able to remove and dispose of the overburden without the assistance of other min-ing machines. In surface mining, draglines are employed in excavating a long strip of overburden sitting above the target mineral reserve. Figure 2 shows the typical geometric structure of a surface coal mine without the dragline

dragline cycle is composed of the following phases: (i) Filling the bucket by dragging it towards the dragline; (ii) Swinging the loaded bucket along a predetermined arc; (iii) Paying out the dirt onto a spoil pile; (iv) Swinging the empty bucket back

The procedure of dragline specification selection Open cast (strip mining) method in surface mines has obtained rapid development worldwide in recent years. In China, there are a number of mining areas, the occurrence conditions of which are suitable for application of open cast method with draglines. The open cast method in surface mines combines

Dragline productivity and its stripping capabilities are directly affect,~d by the selection of digging method, strip layout and pit geometry .Every mine has a unique combination of geological conditions. The operating methods that work well at one mine may not necessarily work at another site. Selection of an optimal stripping method, strip layout and pit geometry for a given

1.2 Dragline mining in India 2 1.3 Goal 3 1.4 Objectives 3 considerable portion of coal is produced by surface mining methods. Regarding the economics of scale extraction methods are highly mechanized and equipment with huge capacity are utilized. Draglines have been abundantly used in coal mining for decades, either as stripper or stripper and coal extractor.

16.11.2015· 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...

Typical configuration, dig & dump cycle, understanding dragline working envelope, and dragline buckets. Dragline Operating Methods. Range diagrams, pit layout, boxcuts, single seam applications, multi-seam applications, use of dozers & throw blasting, handling geotechnical & hydrological issues. Dragline Productivity.

A dragline system is an unusually large land machine that is used in civil engineering, strip mining, and excavation. The larger types of dragline excavators are used in strip mining operations to extract phosphate rock. These are among the largest types of mobile equipment and can weigh upwards of ten thousand tons.

-pull back method-two dragline: intermediate extended benching-terrace mining-roll-over mining

Draglines are one of the largest machines used in surface mining (see Figure 1). Each dragline is a self-contained excavation system that is able to remove and dispose of the overburden without the assistance of other min-ing machines. In surface mining, draglines are employed in excavating a long strip of overburden sitting above

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 digs down to the coal surface, spoiling into a pile on one side. key cut -This cut is designed to excavate a wedge of

design of such operations, the number of alternative methods which need to be considered is consequently greater. Dragline productivity and its stripping capabilities are directly affected by the selection of digging method, strip layout and pit geometry. Every mine has a unique combination of geological conditions. The operating methods that work well

Today, draglines are extensively used in strip mining of coal throughout the world. However, it has found wide range use in non-coal sector also, which includes surface mining of bauxite, phosphor, oil shale and tax sands. In the USSR, draglines are deployed widely for re-handling and

Mining; Surface Mining; Draglines; Efficiency for the Long Term . Cat® Draglines. Cat 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. UNPARALLELED SUPPORT. With the

considerable portion of coal is produced by surface mining methods. Regarding the economics of scale extraction methods are highly mechanized and equipment with huge capacity are utilized. Draglines have been abundantly used in coal mining for decades, either as stripper or stripper and coal extractor. As this equipment possesses certain inherent advantages, which

•Bord & Pillar is the traditional mining method used in India. •It is employed where geo-mining conditions are complex. •Coal is removed from the coal faces initially by developing a set of galleries leaving pillars in between to support the roof. •Thereafter, the pillars are extracted by de-