DRX provides a series of simple graphics that abstract the physical layout of the drill holes to highlight critical features required to make trade-off decisions
Management reporting is designed to provide a quick assessment of the financial and operational impact of any drill plan. This type of report provides a means to determine the exact quantifiable trade-offs produced between any number of possible layouts.
In the following graph we provide a meters vs. coverage curve showing the percentage of the volume being drilled that is covered for varying lengths of drill programs.
The graph compares the DRX solutions to that of a single manual layout. The DRX solutions, in all cases, are more effective in translating meters into coverage. The percentage coverage provides an immediate indication of the potential volume that can be brought into specific resource categories (given geological continuity etc).
The scatter plot provides a rate of coverage showing that, given identical constraints, more than 27,000 meters of drilling would be required to get 95% coverage at 6.25m.
When comparing drill hole plans in DRX each drill hole plan is seen as a trade off between budget and a set of quantifiable parameters.
In the above case, we are exploring the trade-offs between meters drilled and the percentage of the volume that is sampled within 6.25 meters. This single metric provides a direct measure of how well the drill holes, for each potential plan, are sampling the volume being drilled.
For each point generated on the scatter plot there is a corresponding bar chart created to provide a greater level of detailed measures as seen in the following image
The bar graphs each indicate in green the number of meters that are drilled in the target volume. This single metric clearly shows the difference in sampling potential between different plans.
Coverage percentages, representing varying drill spacings are provided below each bar
In the example above it is easy for managers to determine which of the three plans should be further developed. The top plan is a baseline manual layout, corresponding to the red point on the scatter plot. The other two options provide a solution where a high level of sampling is required within the volume of interest vs. a plan where decreasing budget is more important (bottom bar)
Although the physical layout of the drill holes is still important, each DRX solution is guaranteed to meet all user defined constraints. The user can still review and modify the final placement of individual drill holes. Once modifications have been made the metrics can be regenerated to understand and report the change in value being created or lost.
Where varying configurations exist, comparative summary reports (as show above) are provided to allow a quick assessment of each drill plan’s impact. This summary report provides the basis of making objective trade-offs in your drilling and development programs.