Correlative relations for defining the rock deformability

Utvrđivanje Novih Zavisnosti Pri Određivanju Deformabilnosti Stene

“…Also, RMR values are of subjective character (they describe the fracture state). The proposed correlation presented in [10] has three variables. The first depends on RMR, the second one on velocity of elastic waves, and the third on uniaxial strength.…”

“…Furthermore, a modification of the equation [13] was performed, which also gave very good results. The authors suggested two different equations depending on the quality of rock mass, so two different corrections for each equation are given: (10) and (11) Correlations show a relatively good agreement between analytical and experimental values. which can be seen from the data presented in Table 2.…”

“…which can be seen from the data presented in Table 2. For these modified and original models, the mean squared error RMSE (6), the mean absolute error MAE 7, and Pearson coefficient (8) Based on the data presented in Table 2, the suggested correlations in expressions (9), (10) and (11) give more realistic values of the deformation modulus than the original expressions [4] and [13].…”

“…There are many papers dealing with the definition of correlations between the deformation modulus on one side and RMR, wave velocity and uniaxial strength on the other side [3] - [9]. This paper presents an overview of the correlation between results of RMR, wave velocity and uniaxial strength and in situ obtained results of rock mass deformability based on detailed geotechnical investigations of rock mass at the dam "Boĉac", dam "Jelašnica", as well as at the nine barriers on the Ibar river [10]. A new modification of…”