Rocscience International Conference 2023 | April 24-26, 2023 Learn More about RIC2023
 

Search Results

Water

The Water Height is measured from the bottom of the pillar, whereas the Pillar Height and Overburden Thickness are entered as absolute values. This is because water pressure is taken into account if the pillar is specified as "permeable" (Rigid and Elastic analyses only) therefore Water Height less than the Pillar Height can be specified to account for the effect of water pressure on effective vertical and lateral stress. The water surface is drawn on the model at the appropriate level. Any water above the pillar + overburden is referred to as "free water".

Depending on the relative water height, the permeability of the pillar, and the lateral stress option, various situations will arise.

Pillar Is Permeable

If Pillar Is Permeable is unchecked:

  • Water Height < (Pillar Height + Overburden Thickness) will have no effect.
  • Water Height > (Pillar Height + Overburden Thickness) will add a deadload due to the weight of the free water.

If Pillar Is Permeable is checked:

  • Water pressure will reduce the lateral effective stress if the Lateral Stress Stress Type = Gravity.
  • If the water height is more than about twice the Water Height , negative effective stresses will result, and a warning will be displayed when attempting to Compute.
  • If Water Height > (Pillar Height + Overburden Thickness), and lateral effective stresses are not negative, then the weight of the free water will still add an extra deadload component to the pillar load.
NOTE: If water height is too high, negative effective stresses will results, and a warning message will appear when attempting to Compute.

Constant Lateral Stress

Water Height will have no effect on the lateral stress, since the user is already entering effective stresses. If Water Height > (Pillar Height + Overburden Thickness), then the deadload due to the weight of the free water will still be calculated.

Account Icon - click here to log in or out of your account Shopping Cart icon Click here to search our site Click here to close Learning Tech Support Documentation Info Chevron Delete Back to Top View More" PDF File Calendar Location Language Fees Video Click here to visit Rocscience's LinkedIn page Click here to visit Rocscience's YouTube page Click here to visit Rocscience's Twitter page Click here to visit Rocscience's Facebook page Click here to visit Rocscience's Instagram page Bookmark Network Scroll down for more Checkmark Download Print Back to top Single User Multiple Users RSLog RocFall3 CPillar Dips EX3 RocFall RocPlane RocSupport RocTopple RS2 RS3 RSData RSPile Settle3 Slide2 Slide3 SWedge UnWedge Commercial License Education License Trial License Shop safe & secure Money-back guarantee