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It is suggested to assess plastic state of rocks around an unsupported cylindrical excavation by measured displacements of its walls. The problem (overspecified in the viewpoint of classical formulation) has a unique solution that allows calculation of stresses, strains and displacements in the plastic deformation domain, including the elastic-plastic boundary, without addressing the elastoplastic...
The stress-strain state in rocks around an excavation is assessed by the values of stresses “at infinity”, i.e., it is required to know stress distribution in an intact rock mass. The authors propose a new method of the stress-strain state assessment for an arbitrary cross-section excavation based on direct measurement of displacements of the excavation walls, using the Kolosov-Muskhelishvili formulas...
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