Stress-and-strain state of the rock mass in mining deposits in the Urals

DOI: https://doi.org/10.30686/1609-9192-2022-5-79-82
Читать на русскоя языкеR.V. Krinitsyn
Mining Institute of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation
Russian Mining Industry №5 / 2022 р. 79-82

Abstract: With regard to mining at depths the issues of ensuring the chambers stability, the choice of their orientation and the support selection still at the design stage are particularly relevant. At depths, near large tectonic disturbances, the factor of natural rock pressure starts to play a defining role in the underground structures stability, and the constant growth of requirements for improving safety of underground structures predetermines the need to incorporate modern approaches to identify the stressstrain state using numerical simulation. Making design decisions without simulation can lead to a decrease in economic performance and production safety, and sometimes entail the impossibility of full recovery of reserves. The finite element simulation used in this work as one of the main methods for determining the optimal option for primary cutting of the ore body and mining a rich ore body located in close proximity to large-scale tectonic disturbance that provokes a complex stress state of the ore body itself. On a practical level, the finite element method can be discredited, and therefore a description of the sequence of techniques for constructing and calibrating finite element models of primary cutting of the ore body (mining options) is required for correct identification of the most suitable mining option, that is done in this work. The integrated approach includes: formation of complex spatial geometric model of ore bodies, taking into account the morphology of bedding; separation of the model into stages of development and forming different variants of development; determination of borderline conditions for Cauchy tensor correct task; determination of deformation model and assignment of physical and mechanical parameters; carrying out verification calculations; calculation of all model variants, their analysis and selection of the most optimal ore deposit mining technique; interpolation of data into geomechanical block model for the possibility of selecting and substantiating the supports parameters and calculating the stability of chambers using analytical tools.

Keywords: rocks, lithology, tectonics, pillars, abutment pressure, rich ores, impregnated ores, backfill, factor of safety, tensor

For citation: Davydov A.A., Sonnov M.A., Rumyantsev A.Ye., Golovchenko Yu.Yu., Trofimov A.V. Geotechnical justification of primary cutting of the ore body of rich ore deposits of “Glubokaya” mine using methods of stepwise numerical simulation under gravitational-tectonic stress field conditions. Russian Mining Industry. 2022;(5):83–91. https://doi.org/10.30686/1609-9192-2022-5-83-91

Article info

Received: 08.08.2022

Revised: 06.09.2022

Accepted: 07.09.2022

Information about the author

Roman V. Krinitsyn – Head of laboratory, Mining Institute of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

References

1. Kurlenya M.V., Mirenkov V.E., Serdyukov S.V. A look at the nature of the stress-strain state of the Earth's interior and technogenic dynamic phenomena. Mining Informational and Analytical Bulletin. 2008;(8):5–20. (In Russ.) Available at: https://giab-online.ru/files/Data/2008/8/1_Kurlenya.pdf?ysclid=l7rffiqc59139991805

2. Rasskazov I.Y., Saksin B.G., Petrov V.A., Prosekin B.A. Geomechanics and seismicity of the Antey deposit rock mass. Journal of Mining Science. 2012;48(3):405–412. https://doi.org/10.1134/S106273914803001X

3. Kosykh V.P. The influence of weak dynamic influences on the evolution of stresses in a loose medium. In: Fomin V.M. (ed.). Numerical methods for solving problems of the theory of elasticity and plasticity: materials of the 24th All-Russian Conference, Omsk, June 2–4, 2015. Omsk: Omsk State Technical University; 2015, pp. 114–117. (In Russ.)

4. Ivanov V.I. To the forecast and prevention of mining impacts at the mines of the Kola Peninsula. In: Gorbunov G.I. (ed.). Mechanics of rocks during underground construction and development of deposits at great depths: collection of scientific papers. Leningrad: Nauka; 1983, pp. 96–103. (In Russ.)

5. Sidorov D.V. Methodology of reducing rock bump hazard during room and rillar mining of North Ural deep bauxite deposits. Journal of Mining Institute. 2017;223:58–69. (In Russ.) https://doi.org/10.18454/pmi.2017.1.58

6. Mukhamediev S.A. On discrete structure of geologic medium and continual approach to modeling its movements. Geodynamics & Tectonophysics. 2016;7(3):347–381. (In Russ.) https://doi.org/10.5800/GT-2016-7-3-0213

7. Lovchikov A.V. A new concept of the mechanism of rock-tectonic bursts and other dynamic phenomena in conditions of ore deposits. Mining Science and Technology (Russia). 2020;5(1):30–38. (In Russ.). https://doi.org/10.17073/2500-0632-2020-1-30-38

8. Ponomaryov V.S. Energy saturation of geological medium. Transactions of the Geological Institute. 2008;582:1–379.

9. Zubkov A.V., Biryuchev I.V., Krinitsin R.V. The investigations of stressed-deformed rock mass state modifications in the time domain. Gornyi Zhurnal. 2012;(1):44–47. (In Russ.) Available at: https://rudmet.ru/journal/820/article/12495/

10. Lipin I.I., Sentiabov S.V., Krinitsyn R.V. Investigating the variation of the fields of elastic stresses in the rock mass when developing the Peschanskoye deposit. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2020;(5):19–28. (In Russ.) https://doi.org/10.21440/0536-1028-2020-5-19-28

11. Lipin Ya.I. Krinitsyn R.V. Topical issues of stress estimation under the forecast of the shock hazard at the present stage. Sovremennye problemy mekhaniki. 2018;(33):410–418. (In Russ.)

12. Bodin V.V. Influence of local and intensezones of tectonic faults on spatil distribution of spectrum of seismic waves. Mining Informational and Analytical Bulletin. 2014;(4):5–10. (In Russ.) Available at: https://giab-online.ru/files/Data/2014/04/5-10_Bodin_-_6_str.pdf

13. Zoteev O.V. Modeling of cracks in the calculations of the stress-strain state of rock massifs. News of the Ural State Mining University. 2000;(11):252–259. (In Russ.) Available at: https://cyberleninka.ru/article/n/modelirovanie-treschin-pri-raschetah-napryazhennodeformirovannogo-sostoyaniya-skalnyh-massivov?ysclid=l7riyq50f3850128662