Geomechanical regularities of horizontal and vertical deformations of the rock mass in the area of the Kachkanar iron ore Deposit

Since the beginning of the 2000s, observations of horizontal and vertical deformations of the earth’s surface using GPS technologies have been carried out in the area of the Kachkanar field. It was found that all observation points experience significant deformations. It is shown that the direction of movement is dominated by sub-latitude movements, and the vector of movement is directed mainly to the East. Vertical displacements of support points have a multidirectional character. the array sections that are experiencing a rise, as well as zones that are experiencing a fall, are identified. At the same time, the vertical displacement pattern is cellular in nature. Based on the assumption that the areas of horizontal and vertical movements are formed by the processes of deformation of the rock mass in the field of tectonic stresses, a geomechanical analysis of movements based on active tectonic disturbances is performed. The analysis is based on the patterns characteristic of the tectonic stress field in the Ural region. In the Central part of the field, 4 main zones of vertical deformations were identified. Analysis of the faults separating the compression and stretching zones shows that the vector of the main stress generating tectonic activity of the mountain range is oriented along the azimuth of 285°. The study shows that the upper part of the earth’s crust reacts to a powerful manmade impact associated with the extraction of minerals. The natural field of tectonic stresses generates activation of existing tectonic disturbances and the formation of new ones. The results of modern activation of the geological environment must be taken into account in the operation and construction of man-made facilities.

Tagil’tsev, S.N., Panzhin A.A. Geomechanical regularities of horizontal and vertical deformations of the rock mass in the area of the Kachkanar iron ore Deposit. MIAB. Mining Inf. Anal. Bull. 2020;(3-1):235-245. [In Russ]. DOI: 10.25018/0236-1493-2020-31-0-235-245.

Tagil’tsev, S.N.¹, Dr. Sci. (Eng.), Professor, head of the Department of hydrogeology, engineering Geology and Geoecology,
Panzhin A.A.², Cand. Sci. (Eng.), scientific Secretary,
¹ Ural state mining University, 620144, Yekaterinburg, Russia, tagiltsev@k66.ru,
² The Institute of Mining of the Ural branch of the Russian Academy of Sciences, 620075, Ekaterinburg, Russia, panzhin@igduran.ru.

Panzhin A. A.

1. Tagil’cev S.N. Regularities of the spatial arrangement of tectonic disturbances in the field of the current stress state of the Earth’s crust. Gornyj zhurnal. Izv. VUZov. 2018. no 7. pp. 52—66. [In Russ]

2. Gulyaev A.N. Seismicity and seismic zoning of the Urals. Izvestiya vysshikh uchebnykh zavedeniy. Gornyj zhurnal. Izv. VUZov. 2016. no 6. pp. 116—124. [In Russ]

3. Vloh N.P. Upravlenie gornym davleniem na podzemnyh rudnikah [Underground Mining Pressure Management]. Moscow, Nedra, 1994, 207 p. [In Russ]

4. Tazhibaev K.T. Naprjazhenija, processy deformacii i dinamicheskogo razrushenija gornyh porod [Stresses, processes of deformation and dynamic destruction of rocks]. Bishkek, Altyn Print, 2016, 352 p. [In Russ]

5. Artjushkov E.V. Fizicheskaja tektonika [Physical tectonics]. Moscow, Nauka, 1993, 302 p. [In Russ]

6. Gusev G.S., Mezhelevskij N.V., Gushin A.V. et al. Tektonicheskij kodeks Rossii [Tectonic Code of Russia]. Moscow, Geokart, 2016, 240 p. [In Russ]

7. Foulger G.R., Wilson M.P., Gluyas J.G., Julian B.R., Davies R.J. Global review of human-induced earthquakes. Earth-Science Reviews. 2018. T. 178. pp. 438—514.

8. Goncharov M.A., Talickij V.G., Frolova N.S. Vvedenie v tektonofiziku [Introduction to Tectonophysics]. Moscow, KDU, 2005, 496 p. [In Russ]

9. Sherman S.N., Dneprovskij Ju.I. Polja naprjazhenij zemnoj kory i geologo–strukturnye metody ih izuchenija [Stress fields of the earth’s crust and geological-structural methods for their study]. Novosibirsk, Nauka, 1989, 158 p. [In Russ]

10. Zoback M.L. Firstand Second-Order Patterns of Stress in the Lithosphere: The World Stress Map Project//Journal of Geophysical Research, 1992. V.97. no B8. pp. 11761– 11782.

11. Bird C. Planetary Grid. New Age Journal. 5. 1975. pp. 36—41.

12. Golozubov V.V., Kasatkin S.A., Malinovskii A.I., Nechayuk A.E., Grannik V.M. Dislocations of the Cretaceous and Cenozoic complexes of the northern part of the West Sakhalin Terrane.. Geotectonics. 2016. 50 (4). pp. 439—452.

13. Tagil’cev S.N., Kibanova T.N. Hydrogeomechanical structures of tension and compression in the field of modern tectonic stresses. Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal. 2017, no 7, pp. 63—69. [In Russ].

14. Ma C., Meyers S.R., Sageman B.B. Theory of chaotic orbital variations confirmed by Cretaceous geological evidence. Nature 2017. T. 542 (7642). P.468—470.

15. Zanutta A., Negusini M., Vittuari L. et al. Monitoring geodynamic activity in the Victoria Land, East Antarctica: Evidence from GNSS measurements. Journal of Geodynamics. 2017. Vol. 110. pp. 31—42.