Rock Properties

Use the Rock Properties form to specify strength, friction and other rock data. The data is then used in calculations as part of the 1D model workflow.

For each of the rock property inputs, you can choose a log or specify a constant value. If you are working with a case that has had the 1D model workflow performed, the calculated rock properties are automatically selected, though you can change these if necessary.

To specify rock properties

  1. For each of the properties, select a log or define a constant:

UCS  Select a log or select the use constant box and enter a value. By default, the Unconfined Compressive Strength (Case) log created on the Rock Properties form is initially selected, if available.

Internal Friction  Select a log or select the use constant box and enter a value. By default, the Internal Friction Coefficient (Case) log created on the Rock Properties form is initially selected, if available.

If you select constant, changing the unit from 1 to degrees allows you to see the internal friction coefficient converted into the friction angle.

Poisson Ratio  Select a log or select the use constant box and enter a value. By default, the Static Poisson’s Ratio (Case) log created on the Rock Properties form is initially selected, if available.

Tensile Strength  The default selection for Tensile Strength is to define a constant. You can select a log if available.

Biot Coefficient  When not using the specified coefficient of the rock types in the case, you can use a default value by checking the use constant box, located below the Biot Coefficient drop-down list, and specifying a value. Currently, the Biot Coefficient is used to calculate effective stresses; otherwise, it is an elastic material model.