Experimental study on the effects of large single-joints on oya tuff pillar strength

T. K.M. Dintwe, T. Seiki, Aydan, N. Tokashiki, H. Shimada

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

Abstract

As part of stability assessment of an underground room and pillar quarry in Oya, a geotechnical mapping was conducted and a single dominant joint set was observed in the quarry. The joints are large and persistent, and seen cross cutting the pillars. In an attempt to investigate the effects of joints on the pillar strength, a series of laboratory experiments were conducted on pillar samples of Oya tuff. The experiment comprises of intact, and discontinuum samples with through going joints at various dip angles. For long term safety after mining and countermeasure for joints effects backfilling experiments were conducted as well as the degree of backfilling. The results indicate the joint geometry (dip angle) has adverse effects on the pillars strength. It was further realized that the effects of joint inherent properties are less pronounced on the joint dip angles perpendicular and parallel to the uniaxial loadings.

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
Pages2019-2020
Number of pages2
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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