Numerical modelling of the daylight surface subsidence under the influence of mining near tectonic irregularities

The article deals with the assessment of the geomechanical and geodynamic state of the undermined rock massif in the junction zone of the Northern and Central tectonic faults of the Starobinsky potash deposit. The assessment is based on numerical simulations performed using the finite element method. The results of numerical simulations are verified with the data of field observations. Both numerical results and the data of in-situ observations indicate the absence of activation processes in the vicinity of rock faults at the moment of research conduction. The results of the study can be used for selecting technological schemes for conducting mining operations in the near-fault zones and for making forecasts of shear deformation zones in the vicinity of rock faults. The study proves that it is possible to approximate the rheological effects by generalizing the results of solving a series of quasi-static problems using the results of field observations as verification boundary conditions without explicit consideration of creep effects ly. The accuracy of the proposed method for predicting daylight surface subsidence is at least 20%.

Zhuravkov M., Lapatsin S., Nikolaitchik M. Numerical modelling of the daylight surface subsidence under the influence of mining near tectonic irregularities. MIAB. Mining Inf. Anal. Bull. 2022;(10-1):163—172. [In Russ]. DOI: 10.25018/0236_1493_2022_101_0_163.

Zhuravkov M. A.¹ , Dr. Sci. (Phys. and Math.), Head of the department, e-mail: zhuravkov@ bsu.by, ORCID ID: 0000-0002-7420-5821;
Lapatsin S. N.¹ , PhD student, e-mail: lopatinsn@tut.by, ORCID ID: 0000-0001-5958-7799,
Nikolaitchik M. A.¹, PhD student, e-mail: nikolaitchik.m@gmail.com, ORCID ID: 00000003-3733-1615.
¹ Belarusian State University, 220012, Minsk, Republic of Belarus.

Lapatsin S. N., e-mail: lopatinsn@tut.by.

1. Zhuravkov, M., Konovalov, O. (2019). On the problem of building geomechanical models of rock massifs with of a complex structure. Geomechanical fields and processes: experimental and analytical studies of formation and development of focal zones of catastrophic events in mining and natural systems, 2, 253−297.

2. Zhuravkov, M., Stagurova O., Kovaleva M. (2020). Geomechanical monitoring of rock massifs. Minsk.

3. Zhao, X., Zhu, Q. Analysis of the surface subsidence induced by sublevel caving based on GPS monitoring and numerical simulation. Nat Hazards, 103, 3063–3083.

4. Fengyu, R., Dongjie, Z., Jianli, C., Miao, Y., Shaohua, L. (2018). Study on the Rock Mass Caving and Surface Subsidence Mechanism Based on an In-Situ Geological Investigation and Numerical Analysis. Mathematical Problems in Engineering. 1−18.

5. Ma. F., Zhao, H., Yuan, R. et al. (2015). Ground movement resulting from underground backfill mining in a nickel mine (Gansu Province, China). Nat Hazards, 77, 1475–1490.

6. Sepehri, M., Apel, D. B., Hall, R. A. (2017). Prediction of mining-induced surface subsidence and ground movements at a Canadian diamond mine using an elastoplastic finite element model. International Journal of Rock Mechanics and Mining Sciences, 100, 73−82.

7. Shuai, С., Weidong, S., Dan, D., Yuankun, L., Jianqiang, L. (2016). Numerical simulation of land subsidence and verification of its character for an iron mine using sublevel caving. International Journal of Mining Science and Technology,26 (2), 327−332.

8. Parmar, H., Bafghi, Y. A., Najafi, M. (2019). Impact of ground surface subsidence due to underground mining on surface infrastructure: the case of the Anomaly, 12(78), 409.

9. Simeoni, U., Tessari, U., Corbau, C., Tosatto, O., Polo, P., Teatini, P. (2017). Impact of land subsidence due to residual gas production on surficial infrastructures: The Dosso degli Angeli field study (Ravenna, Northern Italy). Engineering Geology, 229, 1−12.

10. Buzylo, V., Pavlychenko, A., Borysovska, O., Saveliev, D. (2019). Investigation of processes of rocks deformation and the earth’s surface subsidence during underground coal mining. E3S Web of Conferences, 123 (01050), 1−12.

11. Zhu, X., Guo, G., Liu, H. et al. (2019). Surface subsidence prediction method of backfill-strip mining in coal mining. Bull Eng Geol Environ, 78, 6235–6248.

12. Yan, W., Chen, J., Yan, Y. (2019). A new model for predicting surface mining subsidence: the improved lognormal function model. Geosci J , 23, 165–174.

13. Taherynia, M. H., Fatemi, Aghda S.M, Ghazifard, A. et al. (2017). Prediction of Subsidence Over Oil and Gas Fields with Use of Influence Functions (Case Study: South Pars Gas Field, Iran). Iran J Sci Technol Trans Sci, 41, 375–381.

14. Li, M., Zhang, H., Xing, W. et al. (2015). Study of the relationship between surface subsidence and internal pressure in salt caverns. Environ Earth Sci, 73, 6899–6910.

15. Cheng, H., Zhang, L., Guo, L., Wang, X., Peng, S. (2021). A New Dynamic Prediction Model for Underground Mining Subsidence Based on Inverse Function of Unstable Creep. Advances in Civil Engineering, 1, 1−9.

16. Wang, B., Jialin, X., Xuan, D. (2018). Time function model of dynamic surface subsidence assessment of grout-injected overburden of a coal mine. International Journal of Rock Mechanics and Mining Sciences, 104, 1−8.

17. Alam, M. S., Kumar, D., Chatterjee, R. S. et al. (2018). Assessment of Land Surface Subsidence Due to Underground Metal Mining Using Integrated Spaceborne Repeat-Pass Differential Interferometric Synthetic Aperture Radar (DInSAR) Technique and Ground Based Observations. J Indian Soc Remote Sens, 46, 1569–1580.

18. Pal, A., Rošer, J., Vulic, М. (2020). Surface Subsidence Prognosis above an Underground Longwall Excavation and Based on 3D Point Cloud Analysis. Minerals, 10 (82), 1−20.

19. Li, G., Chen, L. et al. (2020). Ground subsidence induced by pillar deterioration in abandoned mine districts. J. Cent. South Univ, 27, 2160–2172.

20. Ghabraie, B., Ren, G., Smith, J. (2017). Characterising the multi-seam subsidence due to varying mining configuration, insights from physical modelling. International Journal of Rock Mechanics and Mining Sciences, 93, 269−279.

21. Kazanin, O. I., Ilinets A. A. (2022). Ensuring the excavation workings stability when developing excavation sites of flat-lying coal seams by three workings. Journal of Mining Institute, 253, 41−48. DOI: 10.31897/PMI.2022.1.

22. Meshkov, A. A., Kazanin, O. I., Sidorenko, A. A. (2021). Improving the efficiency of the technology and organization of the longwall face move during the intensive flat-lying coal seams mining at the kuzbass mines. Journal of Mining Institute, 249, 342−350. DOI: 10.31897/PMI.2021.3.3.

23. Li, Y., Peng, S. S., Zhang, J. (2015). Impact of longwall mining on groundwater above the longwall panel in shallow coal seams. Journal of Rock Mechanics and Geotechnical Engineering, 7(3), 298−305.

24. Zhuravkov, M., Martynenko, M. (1995). Theoretical basics of deformation mechanics of rock salt mass. Minsk: University.

25. Zhuravkov, M. (2002). Mathematical modeling of the deformation processes is solid media on the example of geomechanical problems. Minsk: BSU.