Journals →  Gornyi Zhurnal →  2021 →  #4 →  Back

GEOLOGY, PHYSICS AND MECHANICS OF ROCKS
ArticleName Unit weight patterns of overlying rocks above commercial-value salt strata in the Upper Kama deposit
DOI 10.17580/gzh.2021.04.05
ArticleAuthor Chernopazov D. S., Shkuratskiy D. N., Sekuntsov A. I.
ArticleAuthorData

Geomechanics Research Laboratory, VNII Galurgii, Perm, Russia:

D. S. Chernopazov, Head of Laboratory of Geomechanics, Candidate of Engineering Sciences, Dmitriy.Chernopazov@uralkali.com
D. N. Shkuratskiy, CEO, Candidate of Engineering Sciences
A. I. Sekuntsov, Senior Researcher, Candidate of Engineering Sciences

Abstract

Stability of rocks is the main requirement for the safe operation of mines. For this purpose, certain measures are applied for the protection and support of underground openings, including roof support design and roof arrangement in the most stable rocks. Stability assessment of underground excavations is largely related to their roof stability. Determination of possible instability conditions in mine roofs governs the choice of support system design and parameters of mine excavations. The Upper Kama Potash Salt Deposit represents a stratified layer of solid salt rocks. Roof instability develops as stratification and roof collapse. The Mohr–Coulomb criterion of coherent rocks is currently used to estimate parameters of a possible damage zone in the exposed roof. This criterion allows evaluating shear plane angles in roof rocks and, as a result, finding parameters of the possible collapse zone. The experience of mining operations in the Upper Kama deposit shows different failure conditions as against the Mohr–Coulomb criterion as the stress state is scarcely included in the criterion used. This study is an attempt to assess parameters of rock exposures by solving a Lame problem in terms of a single mine excavation. The analytical results were compared with the parameters obtained from the plane elasticity solutions by the finite element method. Based on the implemented studies, an engineering approach is developed for the assessment of anticipated instability parameters in exposed roofs in horizontal excavations driven in salt rocks.

keywords Upper Kama Potash Salt Deposit, salt rocks, strength, failure, mine excavation, mathematical modeling, creep
References

1. Eremenko V. A., Neguritsa D. L. Efficient and active monitoring of stresses and strains in rock masses. Eurasian Mining. 2016. No. 1. pp. 21–24. DOI: 10.17580/em.2016.01.02
2. Cheskidov V. V., Lipina A. V., Melnichenko I. A. Integrated monitoring of engineering structures in mining. Eurasian Mining. 2018. No. 2. pp. 18–21. DOI: 10.17580/em.2018.02.05
3. Trofimov A. V., Kirkin A. P., Rumyantsev A. E., Yavarov A. V. Use of numerical modeling to determine optimum overcoring parameters in rock stress-strain state analysis. Tsvetnye Metally. 2020. No. 12. pp. 22–27. DOI: 10.17580/tsm.2020.12.03
4. Krinitsyn R. V., Khudyakov S. V. Designing support for narrow rib pillars with subvertical fractures. Eurasian Mining. 2017. No. 2. pp. 16–19. DOI: 10.1758 0/em.2017.02.04
5. Maksimov A. P. Overburden pressure and mine support design. Moscow : Nedra, 1973. 287 p.
6. Wittke W. Felsmechanik:Grundlagen für wirtschaftliches Bauen im Fels. Berlin : Springer-Verlag, 1984. 1054 s.
7. Napola J. R., Vining C. A. Consider ations for effective ground support in evaporites. International Journal of Mining Science and Technology. 2019. Vol. 29, Iss. 1. pp. 113–118.
8. Zhao Yanhai, Wang Shuren, Zou Zhengsheng, Ge Linlin, Cui Fang. Instability characteristics of the cracked roo f rock beam under shallow mining conditions. International Journal of Mining Science and Technology. 2018. Vol. 28, Iss. 3. pp. 437–444.
9. Razumov E. A., Zayatdinov D. F., Grechishkin P. V., Pozolotin A. S., Grabovskiy V. A. Experience of active and passive support and reinforcement to maintain wide span junctures in mine MUK-96. Ugol. 2013. No. 7. pp. 31–34.
10. Grechishkin P. V., Pozolotin A. S., Zayatdinov D. F., Sharov V. N. Estimate of efficiency of two-level rock bolting at junctions in coal mines. Gornyi Zhurnal. 2015. No. 8. pp. 48–52. DOI: 10.17580/gzh.2015.08.11
11. Barton N., Baotang Shen. Risk of shear failure and extensional failure around over-stressed excavations in brittle rock. Journal of Rock Mechanics and Geotechnical Engineering. 2017. Vol. 9, Iss. 2. pp. 210–225.
12. Perras M. A., Diederichs M. S. Predicting excavation damage zone depths in brittle rocks. Journal of Rock Mechanics and Geotechnical Engineering. 2016. Vol. 8, Iss. 1. pp. 60–74.
13. Girfanov I. I., Remeev M. M., Sotnikov O. S., Lutfullin A. A., Mukhliev I. R. Selection of optimal strength criteria for the terrigenous Pashiyan horizon of the Romashkinskoe field Tashliyarskaya area. Georesources. 2019. Vol. 21, No. 4. pp. 114–118.
14. Eskaliev M. E., Kozhamkulova Zh. Zh., Suranchieva Z. T., Otelbaeva A. K. Numerical modeling algorithm for elastoplastic problem in surrounding transtropic rock mass around an underground excavation. Geodynamics and Stress State of the Earth’s Interior : Proceedings of the All-Russian Conference on Commemoration of the 80th Anniversary of Academician M. V. Kurlenya with Participation of Foreign Scientists. Novosibirsk : Institut gornogo dela im. N. A. Chinakala SO RAN, 2011. Vol. I.
15. Jianping Zuo, Jiayi Shen. The Hoek-Brown Failure criterion – From theory to application. Singapor : Springer Nature Singapore Pte Ltd., 2020. 225 p.
16. Gilev M. V., Konstantinova S. A., Chernopazov S. A., Chernopazov D. S. Software State Registration Certificate No. 2011610648. The FEM-based elasto-visco-plasticity program (Earth – 2D.1). Unified Register of Russian Programs for Computrs and Databases. Registered: 11.01.2011.
17. Samul V. I. Fundamentals of elasticity and plasticity. Moscow : Vysshaya shkola, 1982. 264 p.
18. Konstantinova S. A., Ponosova T. I. Expandable rock bolt design for salt mines. Izvestiya vuzov. Gornyi zhurnal. 1984. No. 1.
19. Konstantinova S. A., Chernopazov S. A. Estimating salt rocks rheology by in-situ observations of vertical deformation of interchamber pillars. Journal of Mining Science. 2007. Vol. 43, Iss. 1. pp. 17–23.
20. Konstantinova S. A., Chernopazov S. A. Development of hereditary model for deformation and failure of salt rocks. Journal of Mining Science. 2004. Vol. 40, Iss. 1. pp. 45–56.

Language of full-text russian
Full content Buy
Back