Fragmentation Analysis

Source file: fragmentation-analysis-and-report.htm

Note:  Fragmentation Analysands is an add-on that requires additional licensing, which may be obtained via your Maptek Account portal. Please see Licensing Applications for details.

The Fragmentation Analysis tools enable you to analyse and report on blast fragmentation using automated rock size detection and analysis from muck pile scans.

Fragmentation Analysis

Analyse sizes of rocks present in scans or point selections.

Surface Boundaries

Generate a rock size distribution report.

Fragmentation Analysis

The Fragmentation Analysis tool breaks down a point set of a pile of rocks into individual rocks and fines.

Analyse fragmentation as follows:

  1. Select the stock pile scan to be analysed.

  2. On the Query tab, in the Fragmentation Analysis group, click Fragmentation Analysis.

  3. If the scan has no embedded scan origin, select Manual scan origin and pick a point in front of the data set.

    Note:  Clear this option if only analysing a single scan. The tool will use the scan origin point.

    Important:  This option is required if there are multiple scans, or a non-scan point cloud to be analysed. Ensure that the selected origin point gives the best possible view into all voids between rocks.

  4. The default output destination is the legends container. To use a different output destination, drag that container into the Destination field.

  5. Click OK.

    6. PointModeller analyses the fragmentations and stores the results in the destination container.

    Note:  Each time the tool performs an analysis it will create a new result set in the destination container.

    Tip:  You can randomly colour rocks according to size with Ctrl+2 for a better visual representation.

  6. Create a legend to suit the fragmentation analysis results. See Numeric Legend Editor. To determine the size range limits, measure a large and small sample rock in a view window, as below.

gap

Find a large sample rock and measure its width to be used as an upper limit in creating a legend.

Find a small sample rock and measure its width to be used to be used as a lower limit in creating a legend.

Fragmentation Analysis Report

The Fragmentation Analysis Report tool enables you to generate a report from the fragmentation analysis results, including images and graphs, that can then be exported to PDF or a CSV format.

  • To generate a fragmentation report, proceed as follows:

    1. On the Query tab, in the Fragmentation Analysis group, click Fragmentation Analysis Report.

    2. Drag the fragmentation analysis of selection container into the Fragmentation results container field.

    3. For the Legend field, you can do either of the following:

      • Select the legend created above in the project explorer and it will be added to the Legend field.

      • Leave the field empty, in which case the report tool will generate a legend based on the range of data, using the spectrum colour scheme.

    4. Select or clear the following options according to requirements:

      • If selected, Colour points by rock size will colour the rocks according to the legend scaling.

      • If selected, Show overview image will display a coloured representation of the selected area in the report.

    5. Select SWEBREC curve fit to display the fragmentation size distribution in a graph. Leave the Experimental: options cleared.

      Tip

      If you find that the SWEBREC curve is a poor fit to the data curve after generating the report, try again using the experimental options, as below.

      • Select Experimental: Re-estimate xMax to enable Experimental: Limit parameter b.

      • Select Experimental: Limit parameter b and, from the drop-down list, select how to Limit parameter b.

      • Enter tighter constraints for parameter b.

    6. To report the percentage of rocks found that are smaller than a certain size, select Custom mesh sizes (mm) and enter a value.

    7. Select CSV export option if a csv is required and assign the Destination path for the file.

    8. Click OK or Apply.

A report on the fragmentation analysis will be generated and displayed in a PDF view window.

A Fragmentation Analysis report (first page) graphically displaying the rock sizes and coloured according to the legend.

A Fragmentation Analysis report (second page) that displays the details below, depending on options selected.

Reported fragmentation analysis details:

  • Fragmentation size distribution as a SWEBREC curve fit graph and the parameters used for it.
  • A Decile percent passing table showing the percentage of rock sizes found.
  • A Custom mesh passing table showing the percentage of rocks that will pass through a custom mesh size.

The report can be downloaded by clicking or printed by clicking .