Release Notes. Datamine NPV Scheduler Products Version 4.26 Public Release

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1 Release Notes Datamine NPV Scheduler Products Version 4.26 Public Release

2 DATAMINE NPV SCHEDULER EXECUTIVE SUMMARY An optimal strategic plan for an open pit mine maximizes Net Present Value (NPV) while meeting a wide range of production, engineering and economic constraints. Since the time value of money is the essence of evaluating NPV, strategic mine planners face an unsolvable conundrum : if the right time to mine a block of ore depends on its value, but its value depends on when it is mined when is the right time to mine it? NPV Scheduler uses a combination of mathematical rigor and operational practicality to resolve this issue and produce a strategic plan where both the mine design and the production schedule are optimized for maximum NPV. The secret is in the methodology. NPV Scheduler uses geological block models and mining costs, commodity prices and pit slope parameters to create Lerchs-Grossmann (LG) nested phases and an Optimal Extraction Sequence that maximizes NPV. It then forms pushback shapes according to economic value, production targets and engineering constraints, but where traditional scheduling applications confine the pushbacks to the LG phase boundaries, NPV Scheduler takes the phase boundaries as a guide while respecting the need for practical mining shapes. The pushbacks are then scheduled into a period by period production plan by forming activities out of mineable groups of blocks and using a powerful optimizing engine to achieve maximum NPV while ensuring a steady flow of ore tonnes at mineable strip ratios. NPV Scheduler then refines the schedule by adding further engineering requirements: - Haulage Analyser / Optimizer specifies the right truck fleet. It tracks the tonne.kilometres required to mine the resource and then adjusts the schedule over multiple years to minimize peak truck hours and limit the fluctuation in the truck fleet number. - Mine Flow Optimizer (MFO) increases NPV by optimizing cut-off grade. It adjusts the schedule to create more value by mining higher grade ore earlier in the schedule if doing that compensates for the cost of wasting or stockpiling lower grade ore. - Material Allocation Optimizer (MAO) re-allocates the processing of each block (leach pad, mill, stockpile, waste, etc) to optimize multiple blended products (e.g. iron ore) where production targets and product specifications can be blended from different inputs. - Multimine Scheduler solves the problem of optimizing multiple mines simultaneously to meet shared production objectives. Its scalability makes it applicable to scenarios that range from a cluster of pits at the same site up to a regional mining complex.

3 Contents What s new in Maintenance Release General Description 3 Important Messages 3 Who Should Upgrade to this Version? 3 What's Changed in Maintenance Release Using Datamine Software Release Notes 4

4 WHAT S NEW IN MAINTENANCE RELEASE 4.26 General Description This is a maintenance release of NPV Scheduler, RM Scheduler and Maxipit, and contains several new functionalities related to pit optimization, pushback optimization, schedule optimization, mine flow optimization. This release also contains several bug fixes and minor enhancements. Important Messages Projects saved in version 4.26 cannot be opened in version 4.25 and earlier. Projects saved in previous versions can be opened in version New features Improvements o Faster computation of LG pits and LG phases o Ability to constrain tonnage mined from a pushback in a period o Ability to constrain the tonnage mined from a pushback bench o New MFO option to obtain higher NPV o Ability to define and use charting templates o Additional pushback optimization option o Check Values tool works when mining cost is defined per volume o Haulage Analysis in MAO works with one ore rock type Many issues have been resolved (see table on next page) Who Should Upgrade to this Version? This version is applicable to all NPV Scheduler, RM Scheduler and Maxipit users - no prior upgrade path is required, although it is recommended to uninstall previous versions of NPV Scheduler, RM Scheduler and Maxipit.

5 WHAT'S CHANGED IN MAINTENANCE RELEASE 4.26 Using Datamine Software Release Notes The following table contains information relating to software changes, with each item being held in a relevant category. All changes will report both a short and long description, along with an identifying number. The following symbols are used to denote the type of item reported: Represents a software problem or issue that has been resolved. Represents enhancement of existing functionality. Represents a new feature within the application. REFERENCE NPVS-1208 NPVS-1850 NPVS-486 NPVS-878 NPVS-1805 NPVS-1818 NPVS-1831 NPVS-1856 NPVS-1857 NPVS-1861 NPVS-1865 NPVS-811 NPVS-1817 NPVS-1863 NPVS-1859 NPVS-1836 NPVS-1864 NPVS-1845 NPVS-1866 TYPE DETAILS Ultimate pit computation time is significantly reduced Additional Processing Cost is correctly computed when defined with a formula Grades and tonnes are correctly reported when importing multiple VALUE fields Pit Code id is added to all related dialogs The old pushback generating algorithm can be used as an additional option NPVS generated surfaces are now correctly used as initial topography Stability issue when using re-schedule is now resolved User-defined Charting templates can be saved and re-used Reports can no longer be generated with incomplete haulage analysis settings Maximum mining rates can be defined for each pushback bench A rare issue related to pushback adjustment boundaries is now resolved. Check Values tool now works when mining cost is defined per volume. Recovered product totals are now available in Summary reports. Ability to define maximum tonnage mined from a pushback in a period. Parameters Test works with multimine projects. The destination haulage factor is now always recomputed when the rock destination dialog is open. Haulage analysis can be used with one ore rock type. Issue related to producing scheduler reports in multimine projects is now resolved. MFO runs complete regardless of processing constraints.