Saturday, May 2, 2015

Failure Criteria for Rockmasses

Hi there!

As we know, rock-masses are the complex structures. Failure of the rock-mass occur by the development of the fractures or slip surfaces, when the stresses get increased from the strength of the rock mass.
The failure process in rock-mass is complex, and mathematically difficult to quantify. Four failure criteria are:

  1. Coulomb's Criteria
  2. Mohr's Criteria
  3. Hoek and Bray Criteria
  4. Griffith's Criteria.
First three uses empirical approach, and have considerable value for the design of excavation, while the last one has value for understanding the fracture initiation in the rock.