A Brief History: Development of the Hoek-Brown Failure Criterion

(January 23, 2008) - The Hoek-Brown criterion was developed to deal with the interlocking between individual rock pieces which occurs in a jointed rock mass. This paper by Dr. Evert Hoek and Dr. Paul Marinos, lays...

New Rock Fracture Dynamics Lab

(September 26, 2007) - This new lab, the RFDL at the University of Toronto, is now operational. It is the only facility in the world for testing rock samples under true triaxial stresses, with control of pore pressure...

Updates for RocData and RocLab

(February 06, 2007) - For registered users, the Updates for RocData and RocLab implement the Hoek-Diederichs Modulus Estimation Method.

RocData /RocProp Update

(October 17, 2006) - For registered users, the RocData Update offers new features and functionality.

Facilitating Input Data Breakthroughs

(October 18, 2005) - In geotechnical engineering today, numerical modelling capabilities exceed our understanding of soil and rock mass behaviour and the ability to measure input properties. The creation of a...

Empirical Estimation of Rock Mass Modulus

(October 18, 2005) - Based on an analysis of an extensive data set from China and Taiwan the authors have proposed two new equations for empirical estimates of the deformation modulus of rock masses. These estimates...

What is the Difference Between Uniaxial and Global Rock Mass Strength?

(April 26, 2005) - Dr. Hoek clarifies this concept which is defined in the paper, The Hoek-Brown Failure Criterion - 2002 Edition by E. Hoek, C. Carranza-Torres, and B. Corkum.

Need Geotechnical Properties Data?

(September 30, 2003) - What if you could access a reliable database containing rock properties from around the world - select any location on a map and have the data at your fingertips? Gathered from trusted sources,...