Laboratory deformation testing of salt rocks from the Gremyachinsk and Upper Kama deposits

Investigation of physical and mechanical properties of rocks is an integral component of safe and efficient mineral mining. Such investigations are of special concern in construction of Gremyachinsk potash mine. This study aims to investigate deformation of Gremaychinsk salt rocks in uniaxial and triaxial compression testing under conditionally instantaneous and long-term loading. For the comparison of deformation characteristics, laboratory testing involved potash salt from the Upper Kama deposit. The instantaneous test data of salt rocks are presented, and the effect of the side pressure value on the mechanical characteristics of ultimate strength, secant modulus of deformation, secant modulus of relaxation and deformation at retained ultimate strength is analyzed. It is found that Gremychinsk and Upper Kama salt rocks have similar values of the listed mechanical characteristics. The deformation behavior of Gremyachinsk and Upper Kama salt rocks is different. Gremyachinsk salt rocks feature lower rate and stationary creep and, thus, higher long-term ultimate strength. The obtained results can be of interest to practitioners in construction of underground mines in salt rocks.

Keywords: salt rocks, ultimate strength, deformation modulus, ultimate long-term strength, creep, uniaxial compression, triaxial compression, sylvinite.
For citation:

Morozov I.A., Udarcev A.A., Pankov I. L. Laboratory deformation testing of salt rocks from the Gremyachinsk and Upper Kama deposits. MIAB. Mining Inf. Anal. Bull. 2020;(10):16-28. [In Russ]. DOI: 10.25018/0236-1493-2020-10-0-16-28.

Acknowledgements:

The study was carried out under State Contract No. NIOKTR AAAA-A18-118040690032-2, and was supported by the Russian Foundation for Basic Research and by the Perm Krai, Project No. 19-45-590004.

Issue number: 10
Year: 2020
Page number: 16-28
ISBN: 0236-1493
UDK: 622.831
DOI: 10.25018/0236-1493-2020-10-0-16-28
Article receipt date: 27.03.2020
Date of review receipt: 15.04.2020
Date of the editorial board′s decision on the article′s publishing: 20.09.2020
About authors:

I.A. Morozov, Graduate Student, Perm National Research Polytechnic University, 614990, Perm, Russia,
A.A. Udarcev1, Junior Researcher, e-mail: udartsev@mi-perm.ru,
I.L. Pankov1, Cand. Sci. (Eng.), Senior Researcher,
1 Mining Institute of Ural Branch, Russian Academy of Sciences, 614007, Perm, Russia.

 

For contacts:

A.A. Udarcev, e-mail: udartsev@mi-perm.ru.

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