THE EFFECT OF OPENING SHAPES ON THE STABILITY OF UNDERGROUND TUNNELS: A FINITE ELEMENT ANALYSIS. International Journal of Geomate, [S. l.], v. 21, n. 87, p. 19–27, 2021. Disponível em: https://geomatejournal.com/geomate/article/view/1301. Acesso em: 28 sep. 2026.