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.

Keywords: deformations of the earth’s surface; stress-strain state; active faults; zones of tension and compression; vector of the main maximum stress.
For citation:

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.

Acknowledgements:
Issue number: 3
Year: 2020
Page number: 235-245
ISBN: 0236-1493
UDK: 622.831.232
DOI: 10.25018/0236-1493-2020-31-0-235-245
Article receipt date: 21.11.2019
Date of review receipt: 07.02.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

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.

 

For contacts:

Panzhin A. A.

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