PSI - Issue 32

Artem Udartsev et al. / Procedia Structural Integrity 32 (2021) 187–193 Author name / StructuralIntegrity Procedia 00 (2019) 000 – 000

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Fig. 7. Changes in the mechanical properties of sylvinite (1) and carnallite (2) depending on the lateral pressure: a) ultimate strength; b) failure strain

The values of the long-term strength, determined at different lateral pressures, were estimated according to the scheme presented in (Baryakh et al., 1996;Kartashov et al., 1979). The results of estimating the ultimate strength of sylvinite and carnallite are given in Table 3.

Table 3. Estimated values of the ultimate strength of sylvinite and carnallite Lateral loading  3 , MPa Ultimate long-term strength Silvinite Carnallite 0 0. 48σ str - 5.0 0. 37σ str 0. 28σ str 7.5 0. 35σ str -

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Fig. 8. Influence of the loading degree on the steady-state creep rate:a) sylvinite; b) carnallite