overburden in opencast mines
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- overburden in opencast mines
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THE OPENCAST MINING OF IRONSTONE AND COAL W. DAVID EVANS OPENCAST mining, or large-scale quarrying, of bedded minerals has been carried out in this country for over one hundred years. As distinct from underground mining it involves the removal of superincumbent strata, or overburden, which are discharged, or dumped, clear of the mineral exposed.
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Specifically speaking, once the blast-casting technique is applied in opencast coal mines for overburden removal, 30–65% of the materials can be directly thrown into the mined-out area without any need for further handling (Figure 1); thus, it will reduce the stripping cost by more than 30% [1, 2]. As a matter of fact, blast-casting is the ...
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weathered overburden and low-wall spoil piles. Geological and geotechnical field investigations were conducted at two operating opencast coal mines - New Vaal Colliery and Wonderwater Strip Mine. The two mines are situated in differing geological and geotechnical environments, yet the controls on highwall stability are the same at both sites.
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According to MoEF guidelines, any mine situated within 50 km from a power plant must use at least 25% flyash as its backfill material. In this project the stability of overburden dumps mixed with fly ash at KTK opencast mine of SCCL was studied. Samples of overburden and fly ash were collected from KTK mine and APGENCO, Chelpur respectively.
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In opencast mining the total overburden generated is around 2761.1 M Cum, which will be disposed in three disposal sites like Surface dumps, Backfill dump and Top soil dump which are located within the mine site. All the overburden generated will be rehandled by the end of the mine closure.
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Opencast workings or opencuts are surface excavations in which the overburden is stripped by hand or mechanical excavators, thereby laying bare the mineral, which is …
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Opencast lignite mines Waste management. When a lignite mine is re-opened, the topsoil is first removed and stored separately for later recultivation. Then the overburden layers lying on the coal seam, which usually consist of quaternary and tertiary layers in lignite mining, are cleared and stored on dump.When re-opening the dump is inevitably outside the open pit and is therefore …
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Suppose in an opencast mine (ABC), 1350.14 CuM OB was removed in 2015-16 against the production of 432.98 Te of coal, the current ratio will be 3.12 . Contd. - •Mines Overhead – It is indirect cost related to both – mineral extraction and overburden removal •Mining Plan – it is a part of project report,
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Failure of overburden dumps is a common problem among major opencast mines across the world. In recent years, as technology advanced, the …
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The specificity of formation of high overburden dumps in opencast excavations and ravines is considered. It is proposed to exercise high dumping and deformation control in piled rocks by using a new dumping complex supporting high efficiency and safety of dumping operations.
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Download Table | -Coal production and overburden removal from mines from publication: Value added constructional bricks from overburden of opencast coalmines | This paper presents utilization of ...
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Major environmental impacts of opencast mining are degradation of landscape and aesthetics of the area by creating huge overburden dumps and deep voids at the mining sites. These overburden dumps are characterised by high rock fragment contents, low moisture retention capacity, higher bulk density, …
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Jänschwalde opencast mine Overburden conveyor bridge F 60: 34,200 m3/h Bucket-wheel excavator SRs 2,000: 6,000 m3/h Cottbus-Nord opencast mine Overburden conveyor bridge F 34: 8,100 m3/h Mining output Coal extraction Jänschwalde opencast mine Bucket-wheel excavator SRs 1,300: 33,500 m /h Bucket-chain excavator ERs 710: 1,400 m3/h Cottbus-Nord ...
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for more than 90% of the total coal produced in India. In opencast mining, first overburden (soil and rock lying above the coal seam) is removed to access the coal seam. Once the coal seam is exposed, it is mined out and overburden is backfilled in the mined-out area. The excess overburden is stacked near pit boundaries as external dumps.
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S.K. Chaulya, G.M. Prasad, in Sensing and Monitoring Technologies for Mines and Hazardous Areas, 2016 Abstract. Opencast mining operations involve huge quantities of overburden removal, dumping and backfilling in excavated areas. A substantial increase in the rate of accumulation of waste dumps in recent years has resulted in greater height of the dump for minimum ground …
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from Opencast Mines using high capacity machines like Dragline, Shovels, Dump Trucks, Surface miners etc. It is reported that there are mines producing 80 million tonnes per annum of coal from a single Opencast mine and there are projects planned to produce 110m million tonnes. All type of equipments and conditions are
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Opencast mining operations involve the removal of huge quantities of overburden, dumping, and backfilling of the excavated area; Overburden removal refers to the removal of top-soil to expose the coal seams making them ready for mining. Tailings are a by-product of mining. After ore is processed the resultant waste stream is termed "tailings".
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Environment Impact Assessment of Coal Mining Dhruv Katoria1, Dhruv Sehgal2 and Sameer Kumar3 ... a capacity of 10 million-tons opencast coal mine in 20 years has a potential to destroy around 800 ha of land 2) Air - Mainly in the form of Fugitive Dust. Most mining operations generate ... Solid Waste - Overburden of organic material and soil ...
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Keywords: overburden dump, slope stability, opencast mining, shear strength parameters. 1. INTRODUCTION The increased demand of coal, as a source of power, owing to rapid industrialization and population explosion, has forced the opencast coal mines to turn toward higher mechanization for extraction of coal and
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3.4 Risk Assessment for Overburden Dumping Operation The Tara (East) & Tara (West) was an operating mine before 31st March 2015. About 183.25 MillionCum Overburden was generated between the period from 1996-97 to year 2014-15. Out of this 183.25 MillionCum Overburden, about 34 MillionCum Overburden has already been dumped externally at four ...
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OVERBURDEN DUMP SLOPE STABILITY: A CASE ... 2 Sequence of coal seam at Mungoli Opencast mine, Wani area 10 3 Dry density and Optimum Moisture content 22 4 Cohesion and Frictional Angles 25 5 Factor of safety with changing slope angle of trial-1 27 6 Factor of safety with changing slope angle of trial-2 29 ...
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mining units, namely the Soft Overburden, Hard Overburden and the Mining Horizon. 2.1 Soft Overburden This unit is comprised of clay, alluvium and sand, and varies in thickness from a few metres to over 25m. The material is usually removed by truck and shovel operations one cut ahead of mining and battered back to within the natural angle of ...
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Surface Coal Mine Haul Road Dust Suppression Using Hydrolysed Amylopectin grafted Polyacrylamide Vivek Kumar Kashi, Penchala Abhisek, N. C. Karmakar, S. Krishnamoorthi BHU 5 Issues of overburden handling and backfilling capacity with respect to various depth and stripping ratio in high depth opencast mining SK Bhar, P Bishwas, G K Mishra
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Overburden handling has important impacts on surface mining projects and has to be carefully planned considering both mining activities and site rehabilitation, .Overburden handling activities start at the beginning of the mining project, when a huge amount of material from initial underground development or stripping is removed for site preparation, .
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opencast mining production. The continuously increasing demand of coal has led to rapid opencast mining activities with high stripping ratio of 1:12 to 1:15, in turn requiring large quantities of overburden to be mined and its storage poses serious problem. Recently, few dump failures have taken place.
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