Effect of Confinement Stress on Rock Mass Stability

• Autorzy: Georgieva Temengua , Paneiro Gustavo , Ajdanlijsky George , Horta Costa de Silva Matilde , Falcao Neves Paula

Identyfikatory

DOI

10.29227/IM-2024-01-07

Warianty tytułu

PL

Wpływ ograniczenia naprężenia na stabilność masy skalnej

• Języki publikacji: EN

Abstrakty

EN

A huge number of factors controls rock mass failure, but it is mainly influenced by the state of stress and in particular on the bearing capacity and failure mechanism of the massif. The evaluation of rock mass strength in confined and unconfined compression, as well as its tension strength, are key issues to understand rock mass behaviour prior to failure. A connection between the laboratory analyses of the rock mass and the practical use of the obtained data is presented in the current work. The strength properties, confinement effect and failure mechanisms are successfully studied in volcanic rock specimens from an underground mine. In order to estimate the confinement effect on rock mass strength properties, different confined compression stresses on rock specimens are applied. In addition, the crack initiation and propagation in rock samples are observed and rock mass failure mechanisms are studied. The obtained data is used for stability analyses of an underground openings through determination of the safety factor. The obtained results of the safety factors underlined the influence of the confining stress on the rock mass. The tendency of increasing values of the shear safety factor and decreasing values of the tensile safety factor as confinement increases is found. This is an important observation that would allowed more accurate predictions of the stable and unstable zones of the underground openings to be carried out, and thus the stability of the rock mass to be improved.

Słowa kluczowe

EN

effect of confinement stress; rock mass stability; rock strength; safety factor

PL

wpływ naprężenia ograniczającego; stabilność górotworu; wytrzymałość górotworu; nieograniczone ściskanie

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2024
• Tom: Vol. 1, no. 1
• Strony: 17--25
• Opis fizyczny: Bibliogr. 26 poz., tab., wykr., zdj.

Twórcy

autor

Georgieva Temengua

• ESV EURIDICE EGI, Mol, Belgium

• https://orcid.org/0000-0003-3113-4784

autor

Paneiro Gustavo

• DER/CERENA, Técnico Lisboa, ULisboa, Lisbon, Portugal

• https://orcid.org/0000-0002-9492-7207

autor

Ajdanlijsky George

• Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
• Higher School of Civil Engineering, Sofia, Bulgaria

• https://orcid.org/0000-0003-3476-5282

autor

Horta Costa de Silva Matilde

• DECivil/CERENA, Técnico Lisboa, ULisboa, Lisbon, Portugal

• https://orcid.org/0000-0002-1354-8636

autor

Falcao Neves Paula

• DECivil/CERENA, Técnico Lisboa, ULisboa, Lisbon, Portugal

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).