An RMR-based stability analysis for empirical design of underground excavation spans

A. C. Adoko, A. Alipov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This papers aims at determining the stability zones of the critical span graph, used to design underground excavations. A methodology based on the multinomial logistic regression is employed to identify these zones with their corresponding probabilities. Cases of stable, potential unstable and unstable excavations defined by the RMR and the span were used to perform a classification. The results showed that more than 84% of the excavations were classified correctly. In addition, the associated probability of occurrence was determined and plotted in the critical span graph. It is found that the potential unstable area of the graph with a probability greater than 0.5 is smaller than the original critical span graph. It is concluded that the results of this study could improve the empirical design of underground excavations as a probabilistic interpretation of the critical span graph was established.

Original languageEnglish
Title of host publicationRock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
EditorsSergio A.B. da Fontoura, Ricardo José Rocca, José Félix Pavón Mendoza
PublisherCRC Press/Balkema
Pages671-677
Number of pages7
ISBN (Print)9780367422844
Publication statusPublished - 2020
Event14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019 - Foz do Iguaçu, Brazil
Duration: Sep 13 2019Sep 18 2019

Publication series

NameRock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019

Conference

Conference14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
CountryBrazil
CityFoz do Iguaçu
Period9/13/199/18/19

All Science Journal Classification (ASJC) codes

  • Geology
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

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