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Geoenvironmental Disasters
Fig. 1 | Geoenvironmental Disasters

Fig. 1

From: Assessing the stability of underground caves through iSUMM (innovative, straightforward, user-friendly, mechanically-based method)

Fig. 1

a Geometrical features of the ideal cavity section; b stable and failure conditions depicted on the stability chart developed by Perrotti et al. (2018), where: L is the section width; h is the section height; t is the roof thickness; \(\sigma _v\) is the vertical stress at the cavity section depth; \(\sigma _{cmin}\) is the ultimate value of the uniaxial compressive strength of the rock mass; d\(_1\) is the horizontal distance from the failure curve; d\(_2\) is the vertical distance from the failure curve

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