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The cold plastic bending process of laminated profiles used to manufacture metallic support elements for underground excavations, respectively mining galleries, brings forward the formation and exertion at the base of the profiles of a complex state of residual strain which generates the enhancement of primers during the installation and operation of metallic supports underground, as well as the manifestation of deficiencies regarding the compromise of the sliding capacity and the optimum operation of the support, for loads which are much more reduced than their designed bearing capacity. The paper deals with the results obtained following the graphicalanalytical and numerical calculations for the assessment of the strain state observed and recorded during the cold bending process of the profiles.

Researches Regarding the Residual Strain Recorded During the Cold Bending Process of Metallic Support Elements