Annual Meeting Preliminary Program - Full Brochure (PDF) - SME

TECHNICAL PROGRAM
3:05 PM
Application of Fuzzy Set Theory to RMR Classification System for
Weak and Very Weak Rock Masses
P. Roghanchi, R. Kallu and R. Thareja; Mining Engineering,
University of Nevada, Reno, Reno, NV
The Rock Mass Rating (RMR) system is an internationally recognized classification
system that can be used for preliminary ground control design. Assigning a
single value rather than a range to each parameter of RMR is a source of uncertainty.
However, assigning a single value can be useful for further studies related
to RMR ratings. Fuzzy systems have been successfully used in geotechnical and
mining engineering problems to cope with uncertain data as well as vagueness. In
such scenarios, linguistic rules and rating-based classification of rock masses have
always been questionable. The objective of this study is to apply fuzzy set theory
to the RMR classification system. Fuzzy system proposed in this study is specified
for weak and very weak rock masses (RMR