NPV Scheduler

Pit Optimisation & Strategic Scheduling

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Sophisticated Open Pit Scheduling

Sophisticated scheduling, blending, stockpiling, grade optimisation, process optimisation, production targeting and haulage optimisation.

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Easy-To-Use

Easy-to-use methodology with multiple layers of sophistication, from quick studies to detailed mine plans.

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Optimised Mine Plans

Ultimate pits are optimised for maximum cash flow, maximum reserve life and maximum NPV.

NPV Scheduler

Complete Strategic Mine Planning & Scheduling System

The physical design and production schedule of a mine are inextricably linked. NPV Scheduler is unique in the mining industry as the only strategic mine planning system that optimises both of these elements in the search for maximum NPV. As a complete strategic open pit mine planning system – NPV Scheduler has functionalities spanning everything from pit optimisation, pushback generation, cut-off grade optimisation, scheduling, haulage optimisation and stockpile management. The advanced system caters for alternative techniques beyond NPV for pit optimisation to take account of material blending requirements, or to maximise mine life. The innovative pushback generator delivers the most practical pushbacks of any competing product and the scheduling capability includes optimisation techniques that look ahead to the entire life of the mine as opposed to considering just one period at a time.

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Methodology

01Geological Model

Import a geological block model with grade, lithology, topography, surfaces and mining boundaries. Digitise plan data.

02Economic Model

Define processing methods and input commodity prices, mining costs, milling costs, selling costs, recoveries and create a three-dimensional economic model with multiple possible 'intrinsic block values' that relate to possible processing methods.

03Nested Pits

Use the pseudo-flow algorithm to generate a set of nested Lerchs Grossman (LG) pit phases that represent varying economic parameters and generate an Optimal Extraction Sequence (OES) to model the ideal mining sequence. Alternatively, use the options to maximise the life of mine or to generate a blended pit where products are created by mixing rock types.

04Practical Pushbacks

Use the Optimal Extraction Sequence and pushback ore targets to generate practical pushback shapes that respect good mine design practice.

05Optimised Schedule

Schedule the pushbacks according to production targets and mining constraints to get an optimised schedule. Use truck hours and capital costs as inputs. Refine the schedule with blending, cut-off grade optimisation and stockpile scheduling.

NPVS Key Features

Determining Pushback Shapes

Pushbacks are based on LG phases, but practical mining requires careful formation of the final pushback shapes. NPV Scheduler bases the pushbacks on LG phases, but it also optimises the pushback shapes for practical mining, while retaining the maximum possible NPV.

Visualisation, Animation & Reporting

NPV Scheduler delivers a wide variety of reporting and visualisation options and formats, from full reports with customisable content to 3D rendered life of mine animations.

Haulage Analyser/Optimiser

Easily specify the right truck fleet. Track the tonne-kilometres required to mine the resource and then adjust the schedule over multiple years to minimise peak truck hours and limit the fluctuation in the truck fleet number.

Mine Flow Optimiser (MFO)

MFO increases NPV by optimising cut-off grade. It adjusts the schedule to create more value by mining higher grade or ore earlier in the schedule when that outweighs the cost of wasting or stockpiling lower grade ore.

Material Allocation Optimiser (MAO)

Re-allocates the processing of each block (leach pad, mill, stockpile, waste, etc) to optimise multiple blended products (e.g. iron ore) where production targets and product specifications can be blended from different inputs.

Flexible Material Scheduler (FMS)

A scheduler and material allocation optimiser - it determines the timing of block extraction and destinations for all material types in a block. Scheduling and optimisation proceed period by period, where the 'period' is defined implicitly by production targets; for example, minimum tonnes to mine.

Multimine Scheduler

Multimine Scheduler solves the problem of optimising multiple mines simultaneously to meet shared production objectives. Its flexible scalability makes it applicable to scenarios that range from a cluster of pits at the same site up to a regional mining complex.

Geo-Risk Assessment (GRA)

GRA manages the uncertainty inherent in interpolating grade distribution by considering conditionally simulated block models in the strategic planning process. It generates a range of risk-rated pits which can be used as the basis for the strategic plan – limiting the impact of grade uncertainty on planning outcomes.

Related Software

Studio OP

Studio OP is a complete design and scheduling product for short and medium term planning of open pit mines. Packed with functionality for automated reserve generation, pit design and scheduling, Studio OP makes generating and comparing alternative mine plans a breeze.

Screenshot of the title screen of the Studio OP Pit Design Video Talking about Studio OP's Open Pit Design Functions
Watch On YouTube
Screenshot of the title screen of the Studio OP Pit Design Video Talking about Studio OP's Open Pit Design Functions Watch on YouTube

Studio OP is a complete design and scheduling product for short and medium term planning of open pit mines. Packed with functionality for automated reserve generation, pit design and scheduling, Studio OP makes generating and comparing alternative mine plans a breeze.

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