Block model reports

You can use the block model report to summarise the content of the block model in an easy-to-use format. Block model reports are usually used in resource evaluation to determine the volume, tonnage, and metal content of an orebody.

There are two types of report output available; a Standard Report and a Multiple Percent Report.

Block model reports can contain average or aggregate values for any of the numeric attributes stored in the model (weighted by volume, mass, or unweighted). The reports can group or order the results by any attribute in the model, including dimension (that is, northing, easting, or elevation). You can determine mass using a constant for the specific gravity or by using an attribute field in the model for the specific gravity.

The block model report can also perform calculations on the output values. For example, you could choose to report two elements, calcium and silicon, if both of these elements exist as attributes in the model. You can then output a third column, which is a calculation of the ratio of calcium to silicon. As with all functions in the block model; you can apply a constraint to the model while processing the report.

Standard Report

The standard report allows a single specific gravity attribute and volume adjustment attribute to be used in the calculation of volume, mass, and grade in the report. A volume adjustment is a calculation applied to the volume of an attribute for a block to account for a difference between the material available in the actual physical block and the apparent volume of the block in the model. For example, the volume adjustment could be an expansion factor for excavated material, because a block will take up more space in pieces than it does before mining, or for a dilution and reduction factor applied for the element due to loss during processing.

In a standard report all of the headings used to group the data in the report are determined by the names of the attributes, you do not assign new heading names to group by in the report form.

Multiple Percent Report

Multiple percent reports are useful when you want to report on the material in a model that has been re-blocked to fit a mining size block. Because the blocks are very large in models of this type, each rock type, or element, represented in the model is assigned a percentage of each block. This keeps all of the information about what is in the block, and only loses the information about the position of the material in the block space.

You can use the multiple percent report to report the volume and tonnage of the materials in each block using the percentage attribute for the category of material and its specific gravity. For example, the multiple percent report can calculate the volume, tonnage, and grades of multiple material types in a model, using the percentage of each block that is assigned to each material type and the specific gravity value or attribute assigned to each material type. The difference between the multiple percent report and the standard report is that a multiple percent report can calculate and report multiple material types for each block simultaneously, for any material type that has both a fraction or percentage attribute and a value or attribute for specific gravity in your model. A standard report can report only one material type at a time.

In the multiple percent report you can assign new descriptive names for the headings that will group your data in the report form.