Deformation of underground excavations under conditions of the Gremyachinsk potassium salt deposit

The analysis of rock mass deformation around permanent excavations in sylvinite seam at a depth of 1100 m is presented. Surrounding rock mass features occurrence of hard anhydrite–dolomite rocks in the roof and soft carnallite in the floor of underground excavations. The test openings were driven with height of 3.7 m and width of 6.0 m using a cutter– loader. The deformation control used 6 measurement points in the excavations with support by rockbolting in the patterns of 1.0×1.0, 1.5×1.5 and 2.0×2.0 m. Two measurement points were arranged in an unsupported excavation. It is found that the key factors influencing deformation of the perimeter of underground excavations are the rockbolting design and the geological structure of enclosing rock mass. For instance, the reinforcement of roof support decreases values and velocities of deformation both in the roof and sidewalls of excavations. The highest values of velocities of displacements are recorded in the floor. The increased displacements in the floor rocks should be expected when the distance between the excavation perimeter and the nearest interface of seams (layers) in the floor of a tunnel decreases. The presented results can be of use to experts in the fields of geomechanics as well as in design and construction of underground excavations.

Keywords: mine support, rock bolting, salt rocks, roof displacement, sidewall displacement, floor displacement, tunnel convergence, stability of underground excavations at great depths, salt rock creep.
For citation:

Toksarov V. N., Morozov I. A., Beltyukov N. L., Udartsev A. A. Deformation of underground excavations under conditions of the Gremyachinsk potassium salt deposit. MIAB. Mining Inf. Anal. Bull. 2020;(7):113-124. [In Russ]. DOI: 10.25018/0236-1493-2020-7-0-113-124.


The study was carried out under State Contract No. NIOKTR AAAAA18-118040690032-2 and was supported by the Russian Foundation for Basic Research and by the Perm Krai, Project No. 19-45-590004.

Issue number: 7
Year: 2020
Page number: 113-124
ISBN: 0236-1493
UDK: 622.016
DOI: 10.25018/0236-1493-2020-7-0-113-124
Article receipt date: 10.03.2020
Date of review receipt: 09.04.2020
Date of the editorial board′s decision on the article′s publishing: 20.06.2020
About authors:

V.N. Toksarov1, Cand. Sci. (Eng.), Senior Researcher,
I.A. Morozov1, Engineer, e-mail:,
N.L. Beltyukov1, Cand. Sci. (Eng.), Researcher,
A.A. Udarcev1, Junior Researcher,
1 Mining Institute of Ural Branch, Russian Academy of Sciences, 614007, Perm, Russia.


For contacts:

I.A. Morozov, e-mail:


1. Baryakh A. A., Samodelkina N. A., Pan'kov I. L. Aquifuge rupture under large-scale mining. Part I. Fiziko-tekhnicheskie problemy razrabotki poleznykh iskopaemykh. 2012, no 5, pp. 3—14. [In Russ].

2. Agnieszka Maj Rock-mass movement monitoring system in historical salt mines, using the example of the bochnia salt mine. Procedia Engineering. 2017. Vol. 191. Pp. 496—503. DOI: 10.1016/j.proeng.2017.05.209.

3. Vining A. R., Moore M. A. Potash ownership and extraction: Between a rock and a hard place in Saskatchewan. Resources Policy. 2017. Vol. 54. Pp. 71—80. DOI: 10.1016/j.resourpol.2017.09.002.

4. Moskovskiy G. A., Goncharenko O. P. Mineralogical indications of sedimentation evolution within a potassium-bearing basin in the Gremyachinskoye field (Privolzhskaya monocline). Geologiya, geografiya i global'naya energiya. 2012, no 4, pp. 57—61. [In Russ].

5. Evseev A., Asanov V., Lomakin I., Tsayukov A. Experimental and theoretical studies of undermined strata deformation during room and pillar mining. EUROCK 2018: Geomechanics and Geodynamics of Rock Masses. London, Taylor & FrancisGroup. 2018. pp. 985—990.

6. Asanov V.A., Pan'kov I. L., Evseev A. V., Lobanov S. Yu., Lomakin I. S. Experimental and theoretical research of long term stability of load-carrying elements of the room-and-pillar system of potash beds. Vestnik Permskogo nauchnogo tsentra. 2017, no 1, pp. 8—14. [In Russ].

7. Prushak V.Ya., Polyakov A. L. Fixing of mine workings in complicated mining and geological conditions of the deep horizons of the potash deposit. Aktual'nye voprosy mashinovedeniya. 2016, no 5, pp. 318—321. [In Russ].

8. Prushak V.Ya. Deformation of the edge of the workings of the Starobin deposit of potash salts at different location depths. Doklady Natsional'noy akademii nauk Belarusi. 2016, no 2 (60), pp. 97—101. [In Russ].

9. Guang-Chuan Liang, Xing Huang, Xing-Yu Peng, Yuan Tian, Yu-Hang Yu Investigation on the cavity evolution of underground salt cavern gas Storages. Journal of Natural Gas Science and Engineering. 2016. Vol. 33. Pp. 118—134. DOI: 10.1016/j.jngse.2016.05.018.

10. Pan'kov I. L., Asanov V.A., Udartsev A. A. The research on the influence of load degree and sample shape on salt rock deformation during creeping. Gornyy informatsionno-analiticheskiy byulleten'. 2013, no 1, pp. 246—252. [In Russ].

11. Scott Duncan E. J., Lajtai E. Z. The creep of potash salt rocks from Saskatchewan. Geotechnical and Geological Engineering. 1993. Vol. 11. No 3. Pp. 159—184.

12. Solov'ev V.A., Aptukov V. N., Vaulina I. B. Podderzhanie gornykh vyrabotok v porodakh solenosnoy tolshchi: teoriya i praktika [Maintenance of mine workings in salt-bearing rocks: Theory and practice], Novosibirsk, Nauka, 2017, 264 p.

13. Asanov V.A., Toksarov V. N., Evseev A. V., Bel’tyukov N. L. Specific roof behavior in the southern wing of the Upper Kama potash salt deposit. Journal of Mining Science. 2012. Vol. 48. No 1. Pp. 71—75. DOI: 10.1134/S106273914801008X.

14. Konstantinova S. A., Solov'ev V.A., Chernopazov D. S. Assessment of the stress-strain state of the saline massif containing a single mine at the International kimberlite mine of AK ALROSA. Izvestiya vuzov. Gornyy zhurnal. 2008, no 3, pp. 59—63. [In Russ].

15. Singh A., Kumar C., Kannan L. G., Rao K. S., Ayothiraman R. Estimation of creep parameters of rock salt from uniaxial compression tests. International Journal of Rock Mechanics and Mining Sciences. 2018, Vol. 107. Pp. 243—248. DOI: 10.1016/j.ijrmms.2018.04.037.

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