This paper is focused on the applicability of the GSI classification system to these highly heterogeneous rock masses and proposes an extension of the GSI system to account for the foliated or laminated weak rocks in the lower range of its applicability.

This technical note examines the reliability of a slope stability calculation and a tunnel support design calculation, using rockmass strength and deformation characteristics estimated by Hoek - Brown procedure.

This paper summarizes the interpretation of the Hoek-Brown failure criterion which has been found to work best in dealing with practical engineering problems.<br>

<p>"Support of Underground Excavations in Hard Rock" is the most complete and up-to-date manual for use in the design of excavations and support mechanisms for underground mines.</p>

<p>The focus of this paper is too list the required information for the design of a TBM and focus on the selection of the EPB or Slurry TBM method of face support based on the conditions of the project, from geology, alignment restrictions and local knowledge ...