Weakness Zones and Faults

Published on February 15 2015

Weakness zones and faults are among the most important features in rock excavation. See the definitions for right understanding of these terms.

Weakness zones and faults are described in the Ph.D. thesis, Appendix 2.

See also the paper 'The significance of weakness zones in rock tunnelling'.  

rockmass features

Weakness zones including fault zones have been responsible for many problems and collapses in rock tunnelling as described in the tab 'Geological uncertainties'.

More on weakness and fault zones is presented in the Rock Engineering book.

Important quotations are presented below from time to time:

"…..there is still no acceptable substitute for the field mapping and core logging carried out by an experienced engineering geologist."
Evert Hoek, 1986.