o:7261 Application of the numerical method in the definition of a substrate of circular cross section en Abstract: Looking at the stages of development of the shape of the cross-section of the horizontal room of the pit, it can be concluded, regardless of their diversity, that at the base of all shapes, trapezoidal vaulted and circular shapes, with appropriate combinations, appear as basic shapes. When applying the Phase 2 software, a circular cross-section of the room was used In order to define (design) the tunnel lining in the case of a circular cross-section, the geomechanical data of the example provided by the software producer Phase 2 was used. Keywords: circular cross section, finite element method, Phase2 v 8.0. 91552100 164394761 1552100 978-86-6305-140-9 2025-03-13T00:04:15.142Z 44 no 46 Dragan Ignjatović Institut za rudarstvo i metalurgiju Bor 86240521 0000-0003-2333-6853 2023 46 Lidija Đurđevac Ignjatović Institut za rudarstvo i metalurgiju Bor 78873865 0000-0002-1113-5360 2023 46 Vanja Đurđevac Institut za rudarstvo i metalurgiju Bor 59802889 0000-0002-7973-0916 2023 46 Katarina Milivojević Institut za rudarstvo i metalurgiju Bor 92931849 0009-0000-1306-4044 2023 46 Ivan Jovanović Institut za rudarstvo i metalurgiju Bor 14600551 0009-0000-5174-3734 2023 application/pdf 1803597 https://unilib.phaidrabg.rs/o:7261 no yes 1 70 519.6 92000004 71A03 Proceedings International October Conference on Mining and Metallurgy (54 ; 2023 ; Borsko jezero) 287 291 2023