In order to reflect this information, each block must be assigned a value that essentially shows the net cash flow that would result from mining that block in isolation. With any block model, only a subset of blocks will actually contain material of sufficient grade to make them worthwhile to mine once they are exposed at the surface. Pit optimisation works on a block model of the deposit to be mined and the surrounding material. Be familiar with the Block model module and the Geological database module
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Requirements Prior to performing the exercises in this chapter, you should: Be familiar with the basic principles of Surpac Vision. The result is a 3D surface that represents the base / limit of the pit that maximises the total value of the mine and any further extension of the pit will not increase the total return. The Pit Optimiser then considers each of these blocks in turn to work out which combinations of blocks should be mined in order to return the highest possible total value given mining constraints for a particular sale price. The Pit Optimiser works on a block model of the deposit where each block must have a net value that represents the economic value that will be returned if that block is extracted in isolation. The Pit Optimiser developed by the Surpac Minex Group is based on a variation of the Lerchs Grossman algorithm that was first proposed by Koenigsberg in 1985.
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As a result, several mathematical algorithms have been developed to solve this problem in a reasonable time frame. Designing an optimal pit is a challenging and complex problem that is difficult to solve.
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Optimisation TheoryOverview An optimal pit for a deposit is one that maximises profit and satisfies both cost and slope constraints. 1 The document is for study only,if tort to your rights,please inform us,we will delete WorkflowThe process described in this tutorial is outlined below: Understand the theory basis of pit optimisation models Perform pit optimisation on an existing block model Apply optimisation using an Ore Discounting factor Apply optimisation by assigning Net Values to the block model ObjectivesThe objective of this tutorial is to allow you to create an optimised pit model by applying real world conditions to an existing block model.
SURPAC LESSON MANUAL
RequirementsPrior to proceeding with this tutorial, you will need: To have Surpac Vision v5.1 installed The data set accompanying this tutorial Basic knowledge of Surpac string files and editing tools To have completed the Introduction manual To have completed the Block modelling manual This document introduces the theory behind the pit optimisation process and provides detailed examples using the pit optimisation functions in Surpac Vision. IntroductionPit optimisation allows us to produce a model for pit design based on a block model with real world constraints. 74 Exercise 3 - Assigning Net Values to block model. 2 Data Requirements and Block Model Preparation. Author Rowdy Bristol Surpac Minex Group Perth, Western Australia Product Surpac Vision v5.1
SURPAC LESSON FREE
If you have any difficulties or questions while working through this manual feel free to contact your local Surpac Minex Group Office.
SURPAC LESSON HOW TO
However, it will give new users a starting point and existing users a good overview by demonstrating how to use may of the functions in Surpac Vision.
SURPAC LESSON SOFTWARE
The applications contained within this manual are by no means exhaustive as the possible uses of the software are only limited by the users imagination. About This Manual This manual has been designed to provide a practical guide to the many uses of the software. All brand and product names are trademarks or registered trademarks of there respective companies. Neither is any liability assumed for damage resulting from the use of the information contained herein. Surpac Minex Group Pty Ltd Level 8 190 St Georges Terrace Perth, Western Australia 6000 Telephone: (08) 94201383 Fax: (08) 94201350 While every precaution has been taken in the preparation of this manual, we assume no responsibility for errors or omissions. For such permission, or to obtain extra copies please contact your local Surpac Minex Group Office. Without written permission you may not sell, reproduce, store in a retrieval system, or transmit any part of the documentation. Surpac Minex Group Pty Ltd publishes this documentation for the sole use of Surpac licenses. This software and documentation is proprietary to Surpac Minex Group Pty Ltd.
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The document is for study only,if tort to your rights,please inform us,we will deleteĬopyright 2006 Surpac Minex Group Pty Ltd. Surpac Minex Group Pit Optimiser in Surpac VisionJune 2006