Block Volume
To plot block volume:
- Select Graphs > Graph Data on Slope from the menu or click Graph Data on the Slope
in the toolbar. - The Graph Data on Slope dialog will appear. Using the Data drop-down menu, select Block Volume as the variable to plot.
- Select the value to plot: user-specified percentile, max (envelope), or mean.
- Specify the number of Horizontal Locations used to create the graph.
- Click Plot Data.
The horizontal axis of the Block Volume graph is the x-coordinate of the slope and the vertical axis is the max, average, or specified percentile block volumeat that location.
The location of each vertex on the graph (where the bounce height is sampled) is determined by the number of Horizontal Locations. The width of each bin is calculated by dividing the width of the slope (maximum x-coordinate – minimum x-coordinate of the slope) by the number of Horizontal Locations (a.k.a. intervals, divisions). You specify the number of Horizontal Locations used to create the graph in the Graph Data on Slope dialog before you plot the graph.
- Without fragmentation analysis, the Block Volume data should remain constant throughout the slope. You should only see a change in the Block Volume when fragmentation analysis is enabled, as each occurrence of fragmentation would result in a greater number of blocks and a decrease in block volume in each fragment compared to the original rock.
- The number of Horizontal Locations cannot be changed in the Chart Properties dialog. Make sure you specify the appropriate number of Horizontal Locations in the Graph Data on Slope dialog.
- If the graph appears to be "blocky" or changes considerably when more falling rocks are analyzed, you should probably increase the number of sampling intervals (Horizontal Locations).
- It may be useful to use a data collector or distribution graph to determine the distribution of energies at a specific location, once you have used this graph to narrow down a location of interest.
- The graph appearance can be customized in the Chart Properties dialog, available from the right-click menu.