TY - GEN
T1 - An RMR-based stability analysis for empirical design of underground excavation spans
AU - Adoko, A. C.
AU - Alipov, A.
N1 - Funding Information:
This study was supported by the Faculty Development Competitive Research Grant program of Nazarbayev University, Grant Nº 090118FD5338.
Publisher Copyright:
© 2020 ISRM.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:85084639809
SN - 9780367422844
T3 - Rock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
SP - 671
EP - 677
BT - Rock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
A2 - da Fontoura, Sergio A.B.
A2 - Rocca, Ricardo José
A2 - Mendoza, José Félix Pavón
PB - CRC Press/Balkema
T2 - 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019
Y2 - 13 September 2019 through 18 September 2019
ER -