Drillhole Cones of Uncertainty

When designing underground stopes, tunnels and shafts, it is often necessary to assess whether the voids created by these underground workings are likely to intersect drillholes. This exercise could be used to indicate the risk of rifling causes by such intersections, and/or to assess (where the holes might be, not where they are actually plotted given) historical data of downhole surveys which often possess a level of uncertainty.

On the Wireframe tab, in the Calculations group: Click Drillhole Cones of Uncertainty to identify fill solids and unfilled solids in the wireframe set.

The Drillhole Cones of Uncertainty form is used to generate data models based on a wireframe set and any specified pierce points.

The Input tab provides the option to select a drillhole database or define a string from a file which represent drillhole locations.

The Outputtab should be used to specify the Wireframe Type in which the output solid cones are created. The geometric parameters used to generate the solid cones are also provide in the Output tab.

On the Pierce Points tab , a series of pierce points from an existing wireframe set can be defined, or a new set created.

Rifling risk profiling can also be configured by writing risk labels to a field on the output wireframe type. In addition, colours can be selected to distinguish drillhole solid cones which indicate high or low risk levels. You can also identify solids which you have flagged and categorised as "backfilled solid" in the input solids being evaluated.