With a redesigned log probability plot, improved labeling and a new Mean/Variance plot, geologists can use Surpac to highlight effective top cuts. As the top cut is increased, it affects the mean and variance of material to be mined. Inflections in the curve indicate strong outliers, which can be removed, minimizing the effect of the overall grade and top cut.
Declustering provides improved data visualization and validation to avoid clustered high grade values that can minimize and bias results. Surpac users can generate a report and chart based on various cell sizes, which enables the determination of best cell size and estimation of different cell sizes for declustering. Surpac identifies if the data in each one of the cells is clustered or not, reducing the weighting of the grade to get a more accurate grade estimate for each estimation point.
A quick method to validate the quality of an estimate, the Swath Plot records the number of samples in each slice as well as identifying the average grade of both the block model and composites. Mining geologists can quickly compare and validate the block model estimation to the raw sample data. Once complete, this report can be used externally in other software applications.
The Grade Tonnage Curve feature produces a chart that displays the average grade versus tonnage, allowing geologists to quickly understand the effect of mining at different cutoff grades. As the cutoff increases, the tonnage decreases. Once complete, this report can be used in externally in other software applications.
Dynamic Anisotropy is the ability to estimate using stored ellipsoid orientation information from attributes within the block model. By storing the dip and dip direction of the trend surface DTM triangles to a string file, Surpac users can then populate the Block Model using the existing ‘Assign from Polygon’ estimation function.
With variable sub-celling, geologists are no longer required to house areas of different drilling density in separate models. When using estimation functions such as Ordinary Kriging, Inverse Distance, Nearest Neighbor, and Simple Kriging, Surpac’s customizable Block Model allows geologists to specify user block size during estimation. As a result, geologists have greater flexibility by maintaining all blocks in a single model.