A quantitative estimation of open stope walls overbreak and slough in longhole blasting mining

Amoussou C. Adoko, Khamit Yakubov, Aibek Alipov

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

Abstract

Unplanned dilution can pose huge burden on the profitability of underground mining operations, in particular when mining narrow veins. This paper aims at estimating quantitatively unplanned dilution due to the open stope walls overbreak and slough in longhole blasting mining environment. Open stope mining data are used to assess quantitatively the stope dilution level. The parameters considered in the study included the stope depth, the stope average dip, the hydraulic radius, surface character, RMR, powder factor and the ELOS (equivalent linear overbreak/slough) parameter. A dilution index (DI) is defined using the Rock System Engineering method to relate the dilution to its influencing factors. Multinomial logistic regression is used to establish a probabilistic map of the DI. The results indicated that the RMR, hydraulic radius, undercut area and blasting parameter (powder factor) are the most important factors influencing the dilution index. The computed DI was compared to the ELOS and high correlation was observed. This suggests that the proposed DI-chart could be used to quantify the dilution in longhole mining environment and could complement the well-known stability graph method.

Original languageEnglish
Title of host publication5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
PublisherInternational Society for Rock Mechanics and Rock Engineering
Pages549-554
Number of pages6
ISBN (Electronic)9784907430047
Publication statusPublished - 2019
Event5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 - Okinawa, Japan
Duration: Dec 1 2019Dec 4 2019

Publication series

Name5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019

Conference

Conference5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
CountryJapan
CityOkinawa
Period12/1/1912/4/19

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

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    Adoko, A. C., Yakubov, K., & Alipov, A. (2019). A quantitative estimation of open stope walls overbreak and slough in longhole blasting mining. In 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 (pp. 549-554). (5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019). International Society for Rock Mechanics and Rock Engineering. https://www.onepetro.org/conference-paper/ISRM-YSRM-2019-099