Maiden open pit mineral reserves of million tonnes at a ... Cutoff Grade Tonnes Grade Ounces g/t Au Mt g/t Au 590,000 oz (1) Inferred Mineral Resource figures at a g/t Au cutoff grade. NI 43101 report, June 2015 ... PowerPoint Presentation Author: Alain Boyer Created Date:
Maximizing economic earnings is the most common goal in cutoff grade optimization of openpit mining operations. When this is the case, the price of the product has a critical effect on optimum value of cutoff grade. This paper investigates the relationship between optimum cutoff grade and price to maximize total cash flow and net percent value (NPV) of operation.
In view of multiplemetals openpit, the paper has proposed that multiplemetals cutoff grade optimization model is set using the objective function to maximize net present value (NPV). The method of equivalent coefficient calculation is proposed to convert multimetals cutoff grade optimization to a single metal cutoff grade optimization.
–Majors have cut back on exploration and juniors are mainly unfinanceable –It takes 1215 years to get from discovery to production • BROWN FIELD EXPANSIONS –Should be lower capital intensity but are not –Capital projects cancelled or deferred from shareholder pressure • .
Jan 23, 2015· Another important optimization decision that must be made is the cutoff grade to be used for a specific period. In this paper, a new method is presented that generates near maximal expected profit and dynamically defines the optimal cutoff grade for each mining period or pushback over the lifeofmine, thus deciding whether a block is ore or ...
Geotechnical Considerations in Open Pit Mines Version Department of Minerals and Energy Page 7 of 49 Planning for total mine life (1) The principal employer at, and manager of, a mine must ensure that geotechnical aspects are adequately considered in relation to the design, operation and
Sep 27, 2010· It is the angle at which the wall of an open pit stands and it is determined by rock strength, geologic structures and water conditions. 5 7. Terminology The overall pit slope angle is affected by the width and grade of the haul road. 5 8. Terminology HAUL ROADS: During the life of the pit a haul road must be maintained for access.
Gold Grade (g/t) Mineral Resources* (000s oz Gold) Indicated Inferred Gold Grade (g/t) * See NI43101 slide at the back of this presentation for responsibility and disclaimers. 3 . Mineral Resources that are not mineral reserves do not have demonstrated economic viability.
Open Pit Mining. Underground Mining. Pros and Cons of the two types of mining: Openpit mining in relation to underground mining are lower costs, greater safety, and mechanically easier operations. Surface mining is more efficient than underground mining in terms of recovery, grade control, economy, and flexibility of operation.
Downloadable (with restrictions)! Cutoff grade controls the movement of materials among mining, processing and refining stages of an open pit mining operation. The cutoff grade policy constitutes a schedule of cutoff grades and the associated quantities of materials that flow through various stages over the life of operation. This flow of materials in the system relies on the gradetonnage ...
May 14, 2019· Open Pit Mineral Resources (oxide and fresh mineralization) Cutoff Grade Tonnes Grade Ounces Troy Au Classification Au g/t (x1000) Au .
Large scale single open pit o Low strip ratio (Life of Mine : 1) ... Cut off grade – g/t Au N NAMDINI DEPOSIT FLAGSHIP NAMDINI PROJECT Namdini Mining Licence Boundary (yellow) S. ASX / TSX: CDV 11 POTENTIAL PIT DESIGNS 1,150m long orebody Proposed starter pit
Leapfrog using a g/t Au grade shell. The estimate only considers mineralized zones potentially minable by openpit or underground methods at lower cutoff grades of g/t Au and g/t Au, respectively. The cutoff calculation is based on theassumed parameters listed below: Table 4: Parameters used for Resource EstimatePit Optimization
Determination of cutoff grade strategy is one of the most important stages of open pit mine planning and design. It is the parameter directly influencing the financial, technical, economic, legal, environmental, social and political issues in relation to mining operation.
2. San Dimas cutoff grade of g/t AuEq based on total operating cost of US/t. Metal supply contract obligations have been referenced in determining overall vein reserve estimate viability. Black Fox openpit cutoff grade of g/t and underground cutoff grade of g/t. 3.
Download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. ... Program MSVALP Preliminary Scheduling using Shells Annual Cutoff Grade Analysis ... Open Pit Mine Planning Uploaded by. JhônatanColana. Manual Mine Sight Geoestadistica.
Ecuador aims to more than double mining value to GDP by 2021* Significant public infrastructure investment in airports, roads, and ports Policy shift towards increasing foreigninvestment Fiscal stabilitycontracts VAT refund and accelerated depreciation Enhanced exploration regulation allows expedited permits for "Scout Drilling" Elimination of Windfall Tax, removing import tariffs on ...
April 25, 2017 RPA 55 University Ave. Suite 501 I Toronto, ON, Canada M5J 2H7 I + 1 (416) 947 0907T BARRICK GOLD CORPORATION TECHNICAL REPORT ON THE HEMLO MINE, MARATHON, ONTARIO, CANADA NI 43101 Report Qualified Persons: Jason J. Cox,
Strategic Mine Planning Flexible mine planning to meet changes in the business environment Jurgen Fuykschot Minex Conference 2009SRK Consulting Engineers and Scientists. MINE PLANNING The process to get the right material out of the mine at the right time to ... CUTOFF GRADE VERSUS ECONOMICAL BLOCK ANALYSIS