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STUDY ON THE PHENOMENON OF CRACKS IN SALT ROCKS FROM SLANIC PRAHOVA MINE
Abstract
One of the main mechanisms that determine the deterioration of salt stability is the occurring of fractures as a result of the influence of mining pressure. Aspects of rock salt cracking can be observed both in situ and laboratory tests on rock samples collected from the mining works. Cracking parameters are determined for different conditions: age pillars, excavation technology, how has the bearing size, depth of mining and other random aspects. Geomechanical assessment of underground workings made in rock salt masiff from Slanic Prahova, concluded that salt is homogeneous. Phenomenological approach assumes that all information can be obtained from experiments performed on test samples whose dimensions are large compared to the asperities. Effectively formation of cracks in salt during deformation is very difficult to observe it. This requires a statistical analysis to predict the occurrence of cracking phenomenon based on laboratory tests and to correlate these results with existing theoretical models.
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