<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>

This paper presents an early version of the GSI classification.

<p>Rock support is the term widely used to describe the procedures and materials used to improve the stability and maintain the load bearing capacity of rock near to the boundaries of an underground excavation. In this paper, a distinction is drawn between ...

<p>This paper summarizes some of the basic assumptions about strength of rock masses. A simple empirical failure criterion is presented and its application in engineering design is illustrated by means of a number of practical examples.</p>

<p>Jointed rock masses comprise interlocking angular particles or blocks of hard brittle material separated by discontinuity surfaces which may or may not be coated with weaker materials. The strength of such rock masses depends on the strength of the intact ...

<p>This paper is about a simpler design of cell for triaxial testing apparatus that was developed (Hoek and Franklin,1968), primarily to speed up the testing procedure.</p>

It is examined the basic mechanism of brittle failure of rock in order to gain some understanding of the underlying reasons for the behaviour patterns which are observed.

This paper discusses the basic requirements of a triaxial cell for field use and describes the actual cell which was designed to meet these requirements.

<p>The results of studies of the initiation and propagation of fracture from a single Griffith crack in a biaxial compressive stress field are reported in this paper.</p>

This thesis contains details of an investigation into the applicability of Griffith's brittle fracture theory, modified to account for the effects of crack closure in compression, to the prediction of rock fracture behaviour.