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  • coal bank briefing

    versies related to coal mining in Colombia has surfaced in recent years One problematic project is the vast Cerrejón mine in the La Guajira region of Colombia which covers 69 000 hectares and has relied on a 3.5 billion corporate loan from four UK banks including RBS According to Colombian campaigners the Cerrejón mine

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  • A Coal Mine Dump Stability Analysis A Case Study

    A Coal Mine Dump Stability Analysis tially greater than the dimensions of the rock fragments Shear potency of the waste dump material is the criti cally important parameter in stability analysis The loose broken material usually has low shear strength but its

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  • cerrejon gold mine guajira peninsula columbia

    cerrejon coal mine waste rock Mine Equipments cerrejon coal mine waste rock The Cerrejon Mine located in the Guajira peninsula in northeast In Columbia on the site of the Cerrejon coal mines Inquire Now Economy of Colombia Mother Earth Travel Information about the economy of Colombia gold silver platinum

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  • Recycling of crushed waste rock as backfilling material in

    02 02 2019  In the mining of coal resources for every 1 t of coal mined 10 to 15 by mass of solid waste rock is produced mainly including waste rock discharged in tunnelling and washing The general processing method thereof is to directly lift waste rocks onto the ground and accumulate them to form waste rock dumps.

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  • A Contribution to Open Pit Hard Coal Mine Waste Rock

    Coal mining is an important economic activity as it covers the energy demands generates export revenues and creates employment opportunities Mining can however impact the local environment Different mining operations produce several types of waste materials and one of the major wastes produced by open pit mines is waste rock which

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  • Spontaneous combustion of the Upper Paleocene Cerrejón

    Spontaneous combustion of the Upper Paleocene Cerrejón Formation coal and generation for the extinction and prevention of coal fires produced in endwalls as a result of spontaneous combustion in the Cerrejón mine Influence of soil cover on reducing the environmental impact of spontaneous coal combustion in coal waste gobs A

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  • Cerrejón Minería Responsable

    WASTE ROCK Shovels remove the waste rock and load it onto 240 and 320 tonne trucks that take it to dump sites orto backfill areas ..l REMOVAL LOADING AND TRANSPORT OF COAL Once the coal seams are exposed the mining process begins and the coal is loaded onto 190 tonne trucks TANKERS A fleet of water tankers to wet down the haul roads.

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  • Potential of Fly Ashes for Neutralisation of Acid Mine

    Asif Qureshi Potential of Fly Ashes for Neutralisation of Acid Mine Drainage from Coal Mine Waste Rock ISSN 1402 1757 ISBN 978 91 7583 XXX X Se i listan och fyll i siffror där kryssen är Potential of Fly Ashes for Neutralisation of Acid Mine Drainage from Coal Mine Waste Rock

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  • cerrejon coal mine waste rock

    CerrejónWikipedia the free encyclopedia The coal mine was divided into three main the discoverer of Cerrejon mine tonne trucks and deposited in waste rock dump sites.

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  • PDF Settlement behavior of coal mine waste in

    During 215 years of mining in 13 mines 1.74 billion tons of hard coal and waste rock were extracted mainly by means of a roof fall method Of this almost 87 was extracted after the year 1950.

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  • Potential of coal mine waste rock for generating acid mine

    01 01 2016  Waste rocks WRs from Lakhra coal mining area in Pakistan contain high concentrations of Sulphur 19 to 113 g/kg . Acid mine drainage potential of WRs ranges from − 70 to − 492 kg CaCO 3 /tonne Leachates from acidic WRs with pH 1–2.5 range in concentration of Fe SO 4 2 − and AL from mg/L to g/L and that of trace elements from µg/L to mg/L.

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  • Chapter 9 Waste Rock and Rejects

    the 46 year operational mine life Production from the project will primarily be high quality coking coal with some thermal coal 9.2.2 Waste Rock The open cut mining process will involve stripping topsoil weathered and unweathered waste rock and extracting coal quantities to meet coal production requirements Approximately 5 300 Mbcm

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  • Companies in Focus BHP

    Billiton acquired the Colombian Govt company`s 50 share in El Cerrejon mine in consortium with Anglo American and Glencore This is one of the largest open pit coal mines in the world Mining operations began in 1985 at exactly the same time as the underground coal mines in the UK were closed and Cerrejon became a major supplier of coal to

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  • Reduction and utilization of coal mine waste rock in China

    01 02 2014  In China coal mine waste rock CMWR produced in coal mining and processing is the greatest source of industrial solid waste in terms of production accumulation volume and occupied area There are about 4.5 billion tons of CMWR stockpiled into more than 1700 waste dumps which occupied 150 km 2 of land Bian et al 2009 Zhao et al 2008 .

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  • v118n1a3 Ground control in mining steeply dipping coal

    coal pillar strength For backfilled mining dry waste rock cemented waste rock hydraulic sand fill and paste backfills have been used This study focused on backfill with dry waste rock because the cost is relatively low and gravity driven emplacement of the backfill material can

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  • Open Pit Mine Rock Dump Geotechnical Evaluation

    Mining operations in mountainous terrain generally necessitate development of waste rock dumps on areas of moderate to steeply sloping terrain The design and monitoring of these waste embankments are an integral part of the mine planning function and present a challenge to the geotechnical engineel .

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  • Characterisation of fly ashes for minimisation of acid

    Coal mine waste rocks Samples were collected from four WR deposits near three underground coal mines designated M1 M2 and M3 in a coal field located 45 km NW of Hyderabad Sindh province Pakistan The WR samples were designated WR1 and WR2 collected from M1 WR3 collected from M2 and WR4 collected from M3 .

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  • Easy Guide to Mining Waste Characterisation

    Waste Rock Characterisation Ore is divided into oxidised above the water table transitional within the zone occasional inundated by groundwater and primary below the water table at all times This is usually defined by geologists as it impacts on metallurgy Waste rock associated with mining ore for precious and base metals coal

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  • Plant and invertebrate assemblages on waste rock at

    Abstract Natural regeneration on waste rock was investigated at the old Wangaloa coal mine south east Otago A 450 m long waste rock stack had been created 40 50 years ago and has had little anthropogenic intervention since The stack is made up of a gradient of three main waste rock types defined as silt rich mixed and

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  • coal bank briefing

    mining giant BHP Billiton that once again in 2014 enjoyed financial support from HSBC As too did Anglo American and Glencore BHP Billi ton s partners in Cerrejón Between 2009 and May 2013 HSBC s total involvement in companies behind Cerrejón amounted to £3.133 billion Pre dating the Cerrejón mine are even muddier Colombian coal

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  • Colombian coal mining puts a community on the rocks

    Colombian coal mining puts a community on the rocks Published by MAC on 2009 07 07 The following article was written by an English woman after she experienced for herself the impacts of Colombia s Cerrejon coal mine on the community of Roche in La Guajira province.

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  • opencastmining open cast mining open pit mining coal

    Waste rock is piled up at surface near the edge of the open cut This is known as the waste dump The waste dump is also tiered and stepped to minimise erosion Ore which has been processed is known as tailings and is generally a slurry Cerrejón coal mine in Guajira Department.

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  • Office of Wastewater Management

    Waste rock includes granular broken rock that ranges from fine sand to large boulders depending on the nature of the formation and mining methods employed Characteristics The geochemistry of waste rock varies widely from mine to mine and may vary significantly at individual mines over time as different lithological units are exposed.

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  • PDF Response of Ants and Their Seed Removal in

    Response of Ants and Their Seed Removal in Rehabilitation Areas and Forests at El Cerrejón Coal Mine in Colombia Restoration Ecology 2011 Inge Armbrecht Download PDF Download Full PDF Package This paper A short summary of this paper 37 Full PDFs related to this paper READ PAPER.

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  • 1.1 PHASES OF A MINING PROJECT

    and placer mining but still entail environmental impacts associated with purification beneficiation of metals from the waste piles 1.1.4 Disposal of overburden and waste rock In almost every project metallic ores are buried under a layer of ordinary soil or rock called overburden or waste rock that must be moved or excavated

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  • v118n1a3 Ground control in mining steeply dipping coal

    coal pillar strength For backfilled mining dry waste rock cemented waste rock hydraulic sand fill and paste backfills have been used This study focused on backfill with dry waste rock because the cost is relatively low and gravity driven emplacement of the backfill material can

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  • Above the Mine

    This is the Cerrejon mine one of the biggest coalmines in the world owned since 2000 by BHP Anglo American and Glencore These three companies are listed on the London Stock Exchange The UK imports coal from this mine The mine is more than 30 miles long and five miles wide At least 17 Wayuu and Afro Colombian communities were

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  • coal waste cerrejon

    CERREJÓN COALSteady Growth Market Flexibility CMC Coal Marketing Company yCMC is the exclusive supplier of coal produced in the Cerrejón mining complex yCMC like Cerrejón is owned in equal parts 33 each by Anglo Coal BHP Billiton and Glencore yCMC is an independent marketing company operating in the term and spot markets and competing in many cases with shareholders.

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  • Optimization of techniques for the extinction and

    20 09 2018  The Cerrejón mine has identified fires in its coal production seams for a few years in its operation Fires are produced as a result of spontaneous combustion phenomena Coal spontaneous combustion is a phenomenon that occurs naturally during coal oxidation when exposed to atmospheric conditions due to erosion processes geological and mining practices This phenomenon is a subject

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  • A Coal Mine Dump Stability Analysis A Case Study

    A Coal Mine Dump Stability Analysis tially greater than the dimensions of the rock fragments Shear potency of the waste dump material is the criti cally important parameter in stability analysis The loose broken material usually has low shear strength but its

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  • Potential of coal mine waste rock for generating acid mine

    Coal mining and mineral processing generates large volumes of waste rock and mill tailings corresponding to the main sources of environmental impacts related to mining

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  • Spontaneous combustion of the Upper Paleocene Cerrejón

    The Cerrejon Formation outcrops in the Cerrejon Coal Mine the largest open cast coal mine in the world Two cores 725 m were provided by Carbones del Cerrejon LLC for study.

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  • Potential of Fly Ashes for Neutralisation of Acid Mine

    Asif Qureshi Potential of Fly Ashes for Neutralisation of Acid Mine Drainage from Coal Mine Waste Rock ISSN 1402 1757 ISBN 978 91 7583 XXX X Se i listan och fyll i siffror där kryssen är Potential of Fly Ashes for Neutralisation of Acid Mine Drainage from Coal Mine Waste Rock

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  • Calculation and monitoring analysis of stress distribution

    04 07 2019  The samples used in the compaction property tests were taken from a waste rock hill in the No 12 coal mine of the Pingmei Group and the prepared in a laboratory Firstly the samples were broken into particles with diameters of less than 50 mm using a hammer and then the crushed waste rocks were successively screened to particle sizes of 2.5 10 16 20 25 31.5 40 and 50 mm using

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  • Chapter 8 Waste Rock and Rejects Environmental Impact

    8.4 Waste Rock Overview 8.4.1 Waste Rock Waste rock comprises overburden and interburden material extracted as part of mining operations Overburden is rock that sits above the uppermost target coal seam and is required to be removed to access the coal Interburden is the rock material between the targeted coal seams Waste rock

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  • Elastic and Shear Moduli of Coal Measure Rocks Derived

    The network was used to predict the elastic and shear moduli of the coal measure rocks over a longwall coal mine in SW Pennsylvania This approach demonstrated that it could be used for prediction of elastic and shear moduli of coal measure rocks with reasonable accuracy 1.

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  • Spontaneous combustion of the Upper Paleocene Cerrejón

    01 12 2009  Clinker generates two main problems in the Cerrejón Coal Mine 1 uncertainty caused by disregarding the actual production of coal reserves i.e knowing precisely the extent of clinker for its deduction from the coal reserves and 2 geotechnical instability zones taking into account that clinker is an unstable material it represent a natural aquifer that offers no guarantees.

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  • Metallurgical coal

    Metallurgical met coal or coking coal is a naturally occurring sedimentary rock found within the earth s crust Categories of met coal include hard coking coal semi hard coking coal semi soft coking coal and pulverised coal for injection PCI These apply to the different quality grades of met coal all of which are used to make steel.

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  • Co disposal of lignite fly ash and coal mine waste rock

    29 04 2021  Waste rocks WRs from a lignite producing coalfield and fly ash FA produced from the same lignite have been investigated in this study with a primary objective to determine the potential for co disposal of WRs and FA to reduce the environmental contamination Mixing WRs with FA and covering WRs with FA have been investigated Particle size effect caused ≤2 mm particles to produce

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  • Appendix D Geochemical Assessment of Mining Waste

    Geochemical Assessment of Mining Waste Materials Gemini Coal Project Z Latest DocumentsProjects Gemini Coal Project Page ii The objective of the scope of work was to complete a geochemical assessment of representative samples of mining waste materials in accordance with relevant legislation guidelines and policies and

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  • The Potential Use of Waste Rock from Coal Mining for the

    26 10 2020  Abstract Along with the development of the coal mining industry a massive amount of waste rock has been exhausted It does waste not only plenty of natural resources but also pollutes the environment as well as occupying a large part of the land use for dumpsites.

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  • cerrejon coal mine waste rock

    Home / cerrejon coal mine waste rock Proyecto La Puente Cerrejón Minería Responsable The rock and dirt excavated was hauled to build the embankment road surrounding the mining pit In order to keep access open to the mining pit around 160 metres on the internal road had to be rerouted Cerrejón Coal Limited and Cerrejón North Zone SA henceforth the Companies comply with the

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