Inverse Square law: The radiation Intensity is inversely proportional to the square of the distance. Keywords: Modelling, Optimisation, Design, Surpac, Whittle. Apply the Inverse Square law to create safe distances, times, or radiation amounts.
It is concluded that Surpac and Whittle software combine as a powerful tool for designing an optimal pit. From the optimal pit, a detailed pit designed with circular ramp was selected over one with all-cut ramp since it had a higher expected revenue and lower stripping ratio. The NPV was very sensitive to gold price changes but marginally sensitive to mining cost changes. The optimal pit had 21.19 Mt of ore at an average grade of 1.557 g/t. Pit 36 was chosen having the highest the Net Present Value (NPV) 10% of $338.60 million. During the optimisation, a total of 82 optimal pit outlines were generated using the 3D Lerchs-Grossmann algorithm. The block model grade was estimated using the Inverse Distance Weighting (IDW) method, giving an average grade of 1.533 g/t with 22.79 Mt of ore. Sections through the deposit were used to create a solid model of the orebody, which was divided into blocks to form a block model comprising unit blocks measuring 20 m x 20 m x 10 m. The deposit has undergone intense weathering, forming an oxidised gold deposit up to about 50 m in depth. The work entails: block modelling of MGMP deposit pit optimisation analysis of the Pit NPV’s sensitivity to changes in gold price and mining cost and detailed pit design. Exploration data from Mpeasem Gold Mining Project (MGMP) is used as the primary input for the work. This paper studies the Surpac and Whittle software and their application in designing an optimised pit. 73 Task: Classify Blocks into Ore and Waste. 58Simple Partial Percent Reporting.58 Task: Create Partial Percentage Report. 43 Task: Fill the QPY Zone Using Ordinary Kriging. You will find that it consists of 50 observations (rows. You can access this dataset simply by typing in cars in your R console.
cars is a standard built-in dataset, that makes it convenient to demonstrate linear regression in a simple and easy to understand fashion. 38 Task: Fill the Sand Zone Using Inverse Distance. For this analysis, we will use the cars dataset that comes with R by default. 2.1 Nearest neighbor method 2.2 Inverse distance weighting method 2.3 Kriging 3 Resource block. 33 Task: Fill the BIF Zone Using Nearest Neighbour. Contents 1 Geological modelling 2 Block model estimation. blocks, 1-May-92,Grade classifications of blocks98. 29 Task: Fill the Block Model Using Assign Value. The grades of individual constituents of bauxite, i.e. The file was created using the GEOSTATISTICS module and contains regular blocks with a grade calculated using an inverse distance algorithm. 25Applying Constraints to a Block Model.25 Task: Apply Constraints to a Block Model. 13Ĭreating a Block Model.14Create a Block Model.14 Task: Create a Block Model. 13 Task: Display the Block Modelling Toolbar and Menubar. 11 Task: Set the Work Directory (Windows Vista). The stopping distance is the distance travelled between the time when the body decides to stop a moving vehicle and the time when the vehicle stops completely.
11 Task: Set the Work Directory (Windows XP). 7 Blocks and Attributes.8 Constraints.8 Estimation. Gemcom, the Gemcom logo, combinations thereof, and Whittle, Surpac, GEMS, Minex, Gemcom InSite and PCBC are trademarks of Gemcom Software International Inc. Neither is any liability assumed for damage resulting from the use of the information contained herein. For such permission, or to obtain extra copies please contact your local Gemcom office or visit While every precaution has been taken in the preparation of this manual, we assume no responsibility for errors or omissions. The weighting is the inverse of the distance of the data point from the. Without written permission you may not sell, reproduce, store in a retrieval system, or transmit any part of the documentation. WORKFLOW TO CREATE AND WORK WITH A BLOCK MODEL 1 4 3 2 7 6 5 8 9 10 11 IN. Gemcom publishes this documentation for the sole use of Gemcom licensees. Changes may be made in products or services at any time without notice. This software and documentation is proprietary to Gemcom and, except where expressly provided otherwise, does not form part of any contract. Copyright 2008 Gemcom Software International Inc.