• Plenmeller opencast coal site: a geotechnical and planning ...

     · Plenmeller is a remote upland opencast site in Northumberland designed to produce just over 2 million tonnes of coal during eight years of production. The complex ground conditions comprise thick peat and glacial deposits, overlying much faulted and steeply dipping Coal Measures strata.

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  • Coal Geology | Geoscience Australia

    Coal is mined by both surface or ''opencut'' (or opencast) and underground or ''deep'' mining methods, depending on the local geology of the deposit. Underground mining currently accounts for about 60 per cent of world coal production but around 80 per cent of Australia''s coal is produced from opencut mines.

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  • Opencast Mining

    Mining and opencast mining in particular affect all components of ecosystems (Bradshaw, 1997).During opencast mining, material overlying the mined minerals, called overburden, is excavated and deposited in a heap. This heap can be located either inside the mine pit …

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  • Reading: Open-Pit Mining | Geology

    Open-pit mining, or open-cast mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. This form of mining differs from extractive methods that require tunneling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful minerals or rocks are found near the surface; that is ...

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  • ASSESSMENT OF SLOPE STABILITY IN OPENCAST COAL …

    mining. The opencast mining is now the most mainstream technique for the significant bit of the world''s coal creation. In India, the demand of coal in the year 2016-17 was estimated 884.87 MT whereas the domestic availability of coal was estimated 724.71 MT.

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  • Coal mining

    Coal extraction methods vary depending on whether the mine is an underground mine or a surface (also called open cast) mine. Additionally coal seam thickness and geology are factors in selection of a mining method. The most economical method of coal extraction for …

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  • Plenmeller opencast coal site: a geotechnical and planning ...

     · Plenmeller is a remote upland opencast site in Northumberland designed to produce just over 2 million tonnes of coal during eight years of production. The complex ground conditions comprise thick peat and glacial deposits, overlying much faulted and steeply dipping Coal Measures strata. Previous under- ground workings, high groundwater levels and associated sub- surface reservoirs of …

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  • Opencast coal mining at Kriel Colliery

    ground mine to produce 4 million tons of coal per annum and an opencast mine to produce 4,5 million tons of coal per annum, with a resultant increase in the volumetric extraction of coal. Geology of the Kriel Coalfield Topography and Stratigraphy The Kriel Coalfield covers an area of more than 25 000 ha. The country is generally undulating ...

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  • Basics of an open pit mine

    Open pit mines can be used in coal mining, and they are used extensively in "hard rock" mining for ores such as metal ores, copper, gold, iron, aluminum, and many minerals. In a open pit coal mine, the pit bottom would be the bottom mined coal seam elevation, since it is usually feasible to extract multiple seams when surface mining coal.

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  • STABILITY ANALYSIS OF OVERBURDEN INTERNAL DUMP …

    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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  • Analysis of an advanced dewatering scheme at an opencast ...

    A triangular area of Coal Measures rocks bounded to the south by the major WSW-ENE trending Causey Park Dyke, to the north and west by the limit of outcrop and the east by the North Sea, has been extensively worked by opencast methods over the past twenty years. Due to the close concentration of opencast workings it has been feasible to maintain a regional dewatering scheme over a number of ...

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  • Opencast Coal Development and the Natural Heritage: Policy ...

    Ideally, opencast mining requires long-term planning within a strong policy framework. NatureScot therefore strongly welcomes the recent strengthening of the policy framework for regulating the opencast coal industry in Scotland heralded by NPPG 16. NatueScot''s approach to opencast coal developments recognises the need for a continuing supply ...

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  • Session 06: Case Histories of Geological, Rock and Mining ...

     · Jharia Coalfield, in India, is a prime storehouse of the coking coal. It contains as many as thirty contiguous seams. Multiplicity of seams has contributed to a number of problems, fire, inundated workings, goaf out area and disturbed strata condition. However, due to various geotechnical problems, it was not possible to fully extract coal by underground mining method. Opencast mining is now ...

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  • Mugoli Nirguda Mine

     · The Mugoli Nirguda Extension Deep Opencast Coal Mine project is an expansion of the existing mines. Two Project Reports namely Mungoli OCP (year 1994) & Nirguda OCP (year 1998) for a target capacity of 0.80 Mty & 0.75 Mty respectively were prepared in the geological block.

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  • A new opencast coal mine, Yoctolux Investments (Pty) Ltd ...

    The coal seams are near the surface and therefore an opencast mine is preferential. The first intersected coal seam is approximately 14.61 m below the surface, with an average parting thickness of 0.97 m between the 2 and 2L Seams, and a total coal thickness average of 6.09 m thick. Mining operations will last approximately 29 months.

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  • Westfield Opencast Coal Mine, 1977.

     · Westfield Opencast Coal Mine, 1977. BGS image ID: P001513. Oblique aerial view of the Westfield Opencast Coal Mine from the north-east Fife Region. Cut to extract the abnormally thick development of coals (Boglochty Beds) in the Passage Group of the Namurian of the Scottish Carboniferous succession. The excavation is about 200 metres deep and ...

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  • Stability Evaluation of Highwall Slope in an Opencast Coal ...

    The opencast mining accounts for about 95% of total coal production in India (DGMS Report, 2016). This has resulted in the opencast mines going deeper day by day with the maximum stripping ratio being planned currently looking upto 1:15, at a depth of about 500 m. The benefit of an opencast mine largely depends on the use of the steepest

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  • Structural analysis of the Tabaco anticline, Cerrejón open ...

    The Tabaco anticline is a 15 km long, south plunging, east-vergent anticline in northern Colombia, close to the transpressional collisional margin between the Caribbean and South American plates. In the Cerrejón open-cast coal mine, systematic mapping of coal seams in the middle to upper Paleocene Cerrejón Formation has yielded an exceptional dataset consisting of 10 horizontal slices (sea ...

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  • Opencast Coal Data

     · The majority of the collection was deposited with the National Geological Records Centre by the Coal Authority in July 2001. The collection includes borehole site plans, borehole logs, analyses and geophysical data etc. BGS holdings of opencast data are to be integrated with these collections.

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  • Negative impacts of open-cast mining on the environment ...

     · A major part of iron ore, non-ferrous metals, brown coal, building materials and minerals for industry is being excavated in open-cast mines. This type of mining has a deep impact on the natural strata. Open-cast mining changes geological, hydrological and geotechnical conditions. It influences the existing ecological system and landscape.

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  • (PDF) Advance detection of Slope Failures in Opencast Coal ...

    The Opencast Coal Mine has the annual production target of one million tons. The block is extensively soil covered and the exposures are scanty. The geology of the block has been studied based on the sub-surface data obtained from drilling.

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  • Field Geology and Opencast Mining of Coal, South Wales

     · Field Geology and Opencast Mining of Coal, South Wales Two consecutive weekends: Saturday 15th, Sunday 16th, Saturday 22nd, Sunday 23rd October 2011 led by Dr. Nicholas Chidlaw Key locations include Celtic Energy opencasts East Pit (near Brynamman) on 1st weekend, and Selar (near Hirwaun, N end of Neath Valley) on 2nd weekend. A full day in ...

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  • NANT-HELEN OPENCAST COAL MINE, ABERCRAF | Coflein

    Site Description Nant Helen opencast coalmine at Abercraf is Celtic Energy''s largest operational site, with an annual output of around 400,000 tonnes of coal and reserves of around three million tonnes.All mined coal is transported directly to the nearby processing and distribution centre at Onllwyn (nprn 306037). The site is projected to continue coaling until 2014 and will be restored mainly ...

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  • Factors and challenges affecting coal recovery by opencast ...

    The geological model of an opencast pillar mining operation within the Witbank coalfield has indicated that some 30% of the coal in the no. 2 seam remains in pillars. The no. 4 …

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  • Reclamation of Degraded Landscapes due to Opencast Mining ...

     · The main laws related to the mining and the environment in UK are i) Coal Mines Regulation Act (1908), ii) Mining Industry Act (1920), iii) Coal Act (1938), iv) The Town and Country Planning Act (Scotland) (1947), v) Coal Industry Act (1949), vi) Mineral Workings Act (1951), vii) Mines and Quarries Act (1954), viii) Opencast Coal Act (1958), ix ...

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  • Masama Coal Project

    Masama coal project location and geology. The Masama coal mine occupies 120km² on the south-western edge of the Mmambula coalfield, which is spread over 420km² and is divided into three blocks, namely the West, Central, and East blocks. Masama coal mine forms part of the West block of the Mmambula coalfield.

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  • Opencast Coal Mining Induced Defaced Topography of ...

     · As Raniganj coalfield has an experience of mining for more than two centuries, it has adopted the opencast mining method very earlier over the outcrop tracts of coal bearing geologic formation. Opencast mining is increasing extensively after nationalization of Indian coal mines in …

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  • What Is Open Cast Mining?

     · Open cast mining is a type of surface mining in which mineral resources are removed from the earth through large holes or pits dug into the surface. The term "open cast mining" is used most commonly in Great Britain. In the United States, open cast mining is usually called open-pit or open-cut mining. According to the Berkeley Laboratory for ...

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  • Task 1.4 Geotechnical factors affecting high

    Vaal Colliery (Stewart and Letlotla, 2003). This opencast mine is somewhat unique in several aspects: the basement lithology is dolomite which has provided a Karst-type palaeotopography onto which the Ecca Group sediments were deposited and where peat accumulation took place prior to burial and the formation of the coal seams.

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  • The impact of tectonic deformation upon coal seams in the ...

     · Opencast extraction, unlike that in underground mines, is not unduly impeded by geological deformation and compressional structures such as thrust overlaps, and vertical fold limbs can actually increase the volume of coal beneath a given area.

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  • Landmark Coal Mining Con29M Report

    opencast methods. 7. Present opencast coal mining Is the property within 200 metres of the boundary of an opencast site from which coal is being removed by opencast methods? The property does not fall within 800 metres of an opencast site for which the Coal Authority is determining whether to grant a licence to remove coal by opencast methods ...

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  • AN ENGINEERING GEOLOGICAL INVESTIGATION OF …

    AN ENGINEERING GEOLOGICAL INVESTIGATION OF FOOTWALL TOE-BUCKLE INSTABILITY AT THE MALVERN HILLS OPENCAST COAL MINE, INLAND CANTERBURY A thesis submitted in partial fulfilment of the requirements for the Degree of Master of Science in Engineering Geology at the University of Canterbury by ...

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  • COAL MINING RISK ASSESSMENT for GELLIARGWELLT FARM ...

    Coal-mining geology Opencast Coal Mining The property is not in an area that is likely to be affected at the surface from any planned future workings. However reserves of coal exist in the local area which could be worked at some time in the future. No notice of the risk of the land being affected by subsidence has been given under section 46 ...

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  • Spireslack Opencast Coal Site, East Ayrshire Geology in 3D

    The Geological Society, Burlington House, Piccadilly, LONDON, W1V 0JU Tel: 0207 434 9944 Fax: 0207 439 3470 Website: http// JOINT FIELDTRIP Saturday 9th April 2016 Spireslack Opencast Coal Site, East Ayrshire Geology in 3D Leaders: Dr Graham Leslie and Mike Browne British Geological Survey

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