Determination of the strain characteristics of interblock contacts using rock specimen testing results

A technique for interpreting rock specimen compression testing data is proposed. It consists of mathematical modeling of the loading of a specimen containing the sliding line $L$, on which the stresses are continuous and the displacements are discontinuous. At each step of loading the values of a jump of displacements on $L$ are found from the experimentally known stress-strain dependences. The empirical relations describing the strain process on the sliding line are found using these results. Based on Stavrogin's experimental data, we estimate the parameters of the dependence of the peak strength of the interblock contact on the shift from the normal stress.