Anglo Coal

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Geology and Conversion to Practical Parameters (Boreholes to Reserves) Ian de Klerk SACPS Conference – Vryheid 24 May 2006 SANS 10320:2004 - The Guideline COA L RESOURCES R eported as in situ estim ates COA L RESERVES R eported as M ineable In Situ, R and Saleable OM estim ates INFERRED Increasing level of geoscientific knowledge and confidence INDICATED PROBABLE M ineable In-situ, R , OM Saleable MEASURED PROVED M ineable In-situ, R , OM Saleable C onsideration of m ining, coal proce
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  Geology and Conversion toPractical Parameters(Boreholes to Reserves) Ian de Klerk SACPS Conference –Vryheid24 May 2006  COALCOALRESOURCESRESERVES Reported as in situReported asestimatesMineable In Situ,ROMand Saleableestimates INFERRED Increasinglevel of  INDICATEDPROBABLE geoscientificMineable In-situ,knowledgeROM,andSaleableconfidence MEASUREDPROVED Mineable In-situ,ROM,SaleableConsideration of mining, coal processing, economic, marketing, legalenvironmental, social and governmental factors(the 'modifying factors') SANS 10320:2004 -The Guideline  GEOLOGICAL MODELBUILDINGGEOLOGICAL DATAEVALUATIONREPORTED COALRESOURCES Coal Resources per Classification Category   GEOLOGICAL MODELOPTIMISATION Analysis of data integrity,distribution, spatial data densityand confidence classification for both Structural and Coal QualityData Sets   Confidence Classification intoMeasured, Indicated and InferredCategories for bothstructuraland coal quality models CLASSIFICATION Sub-seam definition,correlation and structuralinterpretation   ROM DISCOUNT FACTORSSALES DISCOUNT FACTORS MINING AND SALESDISCOUNT FACTORS   REPORTED COALRESERVES Coal Reserves per Classification Category   Classification intoProven and Probable ReserveCategories   CLASSIFICATIONLIFE OF MINE PLAN Mine Planning, Layouts,Schedule = Economic Life of Mine Model MTIS Application of Geological cut-offs and losses RESOURCE AND RESERVE ESTIMATION Geological Domains,Mining Horizon selection,Optimisation of Interpolators   Confirmation of the estimateddiscount factors from GTIS toROM and SALES within thearea mined RECONCILIATION TECHNICALMODIFYING FACTORS ENVIROMENTAL, LEGALGOVERNMENTAL, ECONOMICINPUTS  The Geological Model -Resources ã Topographic DTM ã Borehole Collar Survey ã Seam / Sub-Seam Intervals andCorrelation ã Sample Intervals, SampleRepresentivity ã Raw Coal Quality and WashabilityData ã Selection of Mining Horizon ã Structural and Quality Modelling ã Definition of Geological ResourceBlocks –cut-off parameters ã Geological Loss Domains ã Resource Categories per ResourceBlock
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