Geomechanical analysis of the hydrogeological properties of tectonic fault

the filtration structure of Paleozoic rock masses is largely determined by modern tectonic processes. The movement of groundwater can only occur through networks of interconnected open cracks that retain permeability due to constant force processes in the upper part of the earth’s crust. The patterns of tectonic movements and the current stress-strain state of rock masses are studied in the scientific areas of “geomechanics” and “tectonophysics”. The formation of permeability in rocks and the regularities of the location of aquifers in geological structures associated with tectonic processes is the subject of study of the scientific direction “hydrogeomechanics of rock massifs”. The practice of hydrogeological work in areas composed of ancient rocks shows that tectonic faults that are mobile (active) in the modern field of tectonic stresses are characterized by high permeability. The mobility of tectonic faults depends on the location of certain types of faults in the field of modern geodynamic stresses. Hydrogeomechanical studies performed on specific objects should begin with determining the orientation of the vectors of the main maximum stresses (PMS). Studies carried out in the Ural region have shown that in most cases HMNs have two predominant sublatitudinal orientations — 260° and 285°. In the field of action of these stresses, shear subvertical tectonic faults are characterized by the highest water content, forming an average angle of 40° with the HMF vector. The main aquifers are characterized by a strike of 220° and 305—325°. It is necessary to take into account the spatial regularities in the location of active tectonic disturbances, and to widely apply the methodological methods of hydrogeomechanics in hydrogeological practice.

Tagil’tsev S. N., Kibanova T. N., Tagil’tsev V. S., Surganov S. V. Geomechanical analysis of the hydrogeological properties of tectonic fault. MIAB. Mining Inf. Anal. Bull. 2022;(5—1):145—157. [In Russ]. DOI: 10.25018/0236_1493_2022_51_0_145.

Tagil’tsev S. N.¹, ORCID iD: 0000-0002-7289-3958, Dr. Sci. (Eng.), professor, position: head of department, tagiltsev@k66.ru;
Kibanova T. N.¹, ORCID iD: 0000-0001-5396-2826, docent, Cand. Sci. (Eng.), docent, kibanova_1@mail.ru;
Tagil’tsev V. S.¹, ORCID iD: 0000-0002-7923-6045, Cand. Sci. (Geol. Mineral.), docent, vikhgeo@gmail.com.
Surganov S. V.¹, ORCID iD: 0000-0002-3260-076X, senior lecturer, surgsgig@yandex.ru.
¹ Ural State Mining University, Ekaterinburg, 620144, Russia, office@ursmu.ru.

1. Tagiltsev S. N., Cherednichenko A. V., Melnik V. V. Integration of methods of hydrogeomechanics, electrical exploration and biolocation for choosing the locations of hydrogeological wells. MIAB. Mining Inf. Anal. Bull. 2020. no. 3-1. pp. 236—246. DOI: 10.25018/0236—1493—2020—31—0-236—246. [In Russ]

2. Nayak S., Mukhopadhyay B. P., Mitra A. K., & Chakraborty R. Structural control on the occurrence of groundwater in granite gneissic terrain, purulia, west Bengal. Arabian Journal of Geosciences, 2020, 13(18) doi:10.1007/s12517-020-05853-2

3. Sherman S. N., Dneprovsky Yu. I. Stress fields of the Earth’s crust and geological and structural methods of their study. Novosibirsk: Nauka, 1989. p. 158. [In Russ]

4. Menon R., Mysaiah D., Senthil Kumar P., & Lakshmi K. J. P. Structural analysis of lineaments surrounding the kailana-takhat sagar reservoir and its impact on rising ground water levels in jodhpur. Journal of the Geological Society of India, 2021, 97(6), pp. 596— 602. doi:10.1007/s12594—021—1734-y

5. Tagiltsev S. N. Regularities of the spatial location of tectonic disturbances in the field of the modern stressed state of the Earth’s crust. Mining Journal. Izv. VUZov. 2018. no. 7. pp. 52—66. [In Russ]. DOI: 10.21440/0536—1028—2018—7-52—66

6. Zubkov A. V., Sentyabov S. V. Deformation of the earth’s crust, methods of study, patterns, problems. Litosfera, 2020 (6), 863—872. [In Russ]. https:. doi.org/10.24930/1681— 9004—2020—20—6-863—872

7. Saint Jean Patrick Coulibaly H., Talnan Jean Honoré C., Naga C., Claude Alain Kouadio K., Régis Mailly DIDI S., Diedhiou A., & Savane I. Groundwater exploration using extraction of lineaments from SRTM DEM and water flows in béré region. Egyptian Journal of Remote Sensing and Space Science, 2021, 24(3), pp. 391—400. doi:10.1016/j. ejrs.2020.07.003

8. Zubkov A. V. Zakon formirovaniya prirodnogo napryazhennogo sostoyaniya zemnoj kory [The law of formation of the natural stress state of the earth’s crust]. Doklady Akademii nauk. 2018 (3), pp. 1–11 [In Russ]

9. Takam Takougang E. M., Ali M. Y., Bouzidi Y., Bouchaala F., Sultan A. A., & Mohamed A. I. Extraction and characterization of faults and fractures from 3D VSP data in a carbonate reservoir: A workflow. Journal of Petroleum Science and Engineering, 2019, 182 DOI: 10.1016/j.petrol.2019.106328

10. Sahu S. S., & Mohanty S. P. Demarcation of zones of neotectonic activity around regional faults: Morphometric analysis from the wagad highland, kachchh, india. Journal of Earth System Science, 2021, 130(4) doi:10.1007/s12040—021—01716-w

11. Doski J. A. H. Tectonic analysis of lineaments in the gara anticline, kurdistan, northern iraq. Journal of the Indian Society of Remote Sensing, 2019, 47(6), 941—950. doi:10.1007/s12524—019—00940—8

12. Tagil’tsev S. N., Panzhin A. A. Geomechanical regularities of horizontal and vertical deformations of a rock mass in the area of the Kachkanar iron ore deposit. MIAB. Mining Inf. Anal. Bull. 2020; (3—1): 235—245. [In Russ] DOI: 10.25018/0236-1493-2020-31-0-247-257

13. Gulyaev A. N. Seismicity and seismic regionalization of the Urals. Mining Journal. Izv. VUZov. 2016. No. 6. pp. 116—124. [In Russ]

14. Tazhibaev K. T. Stresses, processes of deformation and dynamic destruction of rocks. Bishkek: Altyn Print, 2016. 352 p.

15. Tectonic code of Russia. G. S. Gusev, N. V. Mezhelevskii, A. V. Gushchin i dr. Moscow: Geokart: Geos, 2016. 240 p. [In Russ]