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Rock Classification

The Rock Classification tab is used to edit the default rock classification systems used in RSLog.

Any changes in rock classification will affect the boring logs for previous and future projects.

These Rock Classification definitions are sorted into the following categories:

  • Rock Types: User can add rock types to the three major rock types. These rock types are used by the layer description compiler.
  • Slaking: The process in which earth materials disintegrate and crumble when exposed to moisture.
  • Hardness: Describes the hardness of intact rock core. The default values are after USBR 2001.
  • Grain Size: Describe the grain or clast size. The default values are after USBR 2001.
  • Bedding Spacing: Describes the bedding thickness or spacing of sedimentary or bedded volcanic rock. The default values are after USBR 2001.
  • Fracture Density: The fracture density is based on the fracture spacing observed in recovered core, excluding mechanical breaks, measured along the core axis. The default values are after USBR 2001.
  • Healing: Describes the fracture healing. The default values are after USBR 2001.
  • Weathering: The physical (and sometimes chemical) decomposition of a rock due to exposure.
  • Alteration: Any change in the mineralogic composition of a rock brought about by physical or chemical means.
  • Strength: Strength classification is based on the Unconfined Compressive Strength (UCS) of core specimens. When assessing strength, the geologist/engineer should be aware that you are estimating the intact strength (a sample of rock breaking along a defect provides an invalid strength estimate and the strength should be reassessed).
  • Defects: Divided into several categories including: Type, Surface Shape, Roughness, Infill Type, Infill Thickness, and Infill Character.

Editing a Classification

To edit a default rock classification definition:

  1. Go to the left-hand navigation menu and select Settings page > Rock Classification tab.
  2. Select the corresponding tabs for each classification system and adjust the default settings accordingly:
    1. Click + New button from the toolbar located on top of the table.
    2. Enter the Symbol, Term, and Description once the dialog is prompted.
    3. Click Save button.
  3. To edit a record, hover on the record and click on Edit button on that row.
  4. If you want to ‘reset to default’, click the corresponding button from the toolbar.

Re-ordering the Entries

In a rock classification table (e.g. Weathering) you can order the entries by grabbing the three dot icon handle (on the left end of that row) and dragging the row to the desired position.
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