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1. |
Record Nr. |
UNINA9910464487603321 |
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Autore |
Rendu Jean-Michel <1944-> |
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Titolo |
An introduction to cut-off grade estimation / / by Jean-Michel Rendu |
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Pubbl/distr/stampa |
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Englewood, CO : , : Published by Society for Mining, Metallurgy, and Exploration, Inc., , 2014 |
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ISBN |
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Edizione |
[Second edition.] |
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Descrizione fisica |
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1 recurso en línea (170 p.) |
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Disciplina |
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Soggetti |
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Ores - Grading |
Ores - Sampling and estimation |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Cover; Title Page; Copyright; Contents; Preface to 2014 Edition; Preface to 2008 Edition; Chapter 1: INTRODUCTION; Chapter 2:GENERAL CONCEPTS; Mathematical Formulation: UtilityFunction; Cut-off Grade and Grade-Tonnage Relationship; Direct Profit and Loss: Udir(x); Net Present Value: NPVi; Opportunity Costs and Benefits: Uopp(x); Other Costs and Benefits: Uoth(x); Cut-off Grade and Blending Strategy; Chapter 3:BREAKEVEN CUT-OFF GRADE; Cut-off Grade Between Ore and Waste; Cut-off Grades in Open Pit Mines; Cut-off Grades in Underground Mines; Cut-off Grade Between Two Processes |
Cut-off Grade with Variable RecoveryConstant Tail Model of Variable Recovery; Breakeven Cut-off Grade and Polymetallic Deposits; OpportunityCost of Not Using the Optimum Cut-off Grade; Cut-off Grade and Low-Grade Stockpiles; Cut-off Grade andOptimization of Processing Plant Operating Conditions; Chapter 4:CAPACITY CONSTRAINTS AND OPPORTUNITY COSTS; WhenMarginal Analysis No Longer Applies: A Gold Leaching Operation; Capacity Constraints and Increase in Cut-off Grade; DecreasingCut-off Grade over Time: A Strategic Objective; Cut-off Grade Below Marginal Cut-off Grade |
Cut-offGrade Optimization with Opportunity Costs: Practical ConsiderationsChapter 5:GEOLOGIC CONSTRAINTS AND OPPORTUNITY COSTS; Cut-off Grade When Processing Capacity Is Fixed; Cut-off Grade When Mining Capacity Is Fixed; Cut-off Grade When Volume of |
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Sales Is Fixed; Releasing Capacity Constraints: A Base Metal Example; Chapter 6:CUT-OFF GRADE AND MINE PLANNING; Open Pit Mine: Economic Valuation of a Pushback; Underground Mine: Economic Valuation of a Stope; Similarities BetweenOpen Pit and Underground Mine Planning; Block and Panel Caving |
Relationship Between Mine Selectivity, Deposit Modeling,Ore Control, and Cut-off GradeChapter 7:WHICH COSTS SHOULD BE INCLUDED IN CUT-OFF GRADE CALCULATIONS?; General Considerations; HowSpecific Costs Influence Cut-off Grade Calculations; Other Costs and Benefits; Chapter 8:BLENDING STRATEGY; Blending Two Material Types; Blending Three Material Types; Blending to Maximize Tonnage; RemarksConcerning an Increasingly Complex Blending Problem; Chapter 9:CLOSING REMARKS; APPENDIX A; Example 1. Net Present Value of Constant Cash Flow: Proofof Formula |
Example 2.Net Present Value of Perpetuity Cash Flow: Proof of FormulaExample 3.Opportunity Cost of Mining a Peripheral Deposit; Example 4.Simplified Equation to Estimate Opportunity Cost: Verification of First-Order Approximation; Example5. Opportunity Cost of Not Using the Optimal Cut-off Grade in a Copper Mine; Example 6. Stockpilingand Cut-off Determination in a Copper Mine; Example7. Properties of Constant-Metric-Tons Curves in Blending Diagrams; LIST OF SYMBOLS; BIBLIOGRAPHY; INDEX; ABOUT THE AUTHOR; Back Cover |
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Sommario/riassunto |
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An Introduction to Cut-off Grade Estimation examines one of the most important calculations in the mining industry. Cut-off grades are essential to determining the economic feasibility and mine life of a project. Profitability and socioeconomic impact of mining operations are influenced by the choice of cut-off grades. Cut-off grades play a key role in estimating mineral reserves that can be publicly reported. |
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2. |
Record Nr. |
UNISA996517768703316 |
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Autore |
Neundlinger Klaus |
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Titolo |
Digitale Gesellschaft. »Virtual Skills Lab« - Transdisziplinäres Forschen zur Vermittlung sozialer Kompetenzen im digitalen Wandel / / Beate Schrank, Simone Kriglstein, Thomas Layer-Wagner, Ines Häufler, Elisabeth Frankus, Klaus Neundlinger |
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Pubbl/distr/stampa |
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Bielefeld : , : transcript Verlag, , [2023] |
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©2023 |
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ISBN |
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Edizione |
[1st ed.] |
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Descrizione fisica |
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1 online resource (242 p.) |
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Collana |
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Digitale Gesellschaft ; ; 58 |
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Disciplina |
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Soggetti |
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EDUCATION / Organizations & Institutions |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di bibliografia |
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Includes bibliographical references. |
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Nota di contenuto |
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Frontmatter -- Inhalt -- Einleitung -- Kapitel 1: Entstehung des Projekts im Ideen-Lab -- Kapitel 2: Soziale Kompetenzen im Beruf -- Kapitel 3: Ko-Kreation -- Kapitel 4: Technische Entwicklung -- Kapitel 5: Testung und Evaluation des Prototyps -- Kapitel 6: Gender und Diversität -- Nachwort -- Bibliographie |
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Sommario/riassunto |
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Inter- bzw. transdisziplinäre Forschungsarbeit ist im aktuellen Wissenschaftsbereich häufig gängige Praxis, obwohl die Verständnisse über Umfang und Strukturen einer solchen Zusammenarbeit keineswegs einheitlich sind. Die Autor*innen vermitteln anhand eines Virtual-Reality-Trainings für soziale Kompetenzen Einblicke in die Prozesse des gemeinsamen Forschens. In einer Reihe von Gesprächen reflektieren sie über die Ideenfindung zu ihrem Projekt des »Virtual Skills Lab«, die Entwicklung der dazugehörigen Forschungsfrage sowie deren Ausarbeitung in Form der interaktiven Szene. Entlang dieses Beispiels für virtuelles Training werden schließlich praktische Empfehlungen zur Gestaltung der übergreifenden Zusammenarbeit im digitalen Wandel angeboten. |
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