Mathematical modeling the quarry wall stability under conditions of heavily jointed rocks

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Authors:


Sh.Aitkazinova, orcid.org/0000-0002-0964-3008, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.Sdvyzhkova*, orcid.org/0000-0001-6322-7526, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

N.Imansakipova, orcid.org/0000-0002-3334-645X, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.Babets, orcid.org/0000-0002-5486-9268, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.Klymenko, orcid.org/0000-0002-4442-9621, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (6): 018 - 024

https://doi.org/10.33271/nvngu/2022-6/018



Abstract:



Purpose.
To develop techniques for estimating the pit wall stability in terms of occurring of a zone of heavily jointed rock mass during ore mining at the Akzhal deposit (Kazakhstan), to work out measures to strengthen the rock opening and to verify the effectiveness of the developed measures.


Methodology.
The finite element analysis of the rock stress-strain state is implemented on the basis of the elastic-plastic model and the generalized Hoek-Brown failure criterion. The rock mass quality was assessed using the RMR and GSI rating classifications. This made it possible to simulate a zone of intense fracturing by changing the characteristics of the jointed surface. The shear strength reduction procedure was used to determine the safety factor for the quarry wall.


Findings.
The strain distributions in the rock mass forming the quarry wall have been obtained in terms of the Akzhal polymetallic ore deposit (Kazakhstan). The case of creating a zone of heavily jointed rocks in the area of a tectonic fault was considered. The safety factor of the quarry wall was determined under conditions of increased rock fracturing, as well as after carrying out measures to strengthen the rocks with a hardening solution.


Originality.
The effect of intense jointness on the pit wall stability is demonstrated. A method for the consistent evaluation of the quarry wall stability is proposed considering the change in the rock properties due to natural factors and artificial reinforcement. It is shown that a change in the joint surface quality due to the hardening injection reduces the shear strains in the sliding zone.


Practical value.
The pit wall stability was predicted considering the formation of a zone of intense fracturing under mining and geological conditions of the Akzhal deposit. The possibility of testing the effectiveness of rock strengthening measures based on mathematical modeling was shown.



Keywords:
quarry, wall stability, joints, rock reinforcement, finite element method, stress-strain state

References.


1. Durn, M., Godoy, E., RomnCatafau, E., & Toledo, P.A. (2022). Open-pit slope design using a DTN-FEM: Parameter space exploration. International Journal of Rock Mechanics and Mining Sciences, 149, 104950. https://doi.org/10.1016/j.ijrmms.2021.104950.

2. Uteshov, Y., Galiyev, D., Galiyev, S., Rysbekov, K., & Nu­ryz­bayeva, D. (2021). Potential for increasing the efficiency of design processes for mining the solid mineral deposits based on digitalization and Advanced Analytics. Mining of Mineral Deposits, 15(2), 102-110. https://doi.org/10.33271/mining15.02.102.

3. Sobko, B., Drebenstedt, C., & Lozhnikov, O. (2017). Selection of environmentally safe open-pit technology for mining water-bearing deposits. Mining of Mineral Deposits, 11(3), 70-75. https://doi.org/10.15407/mining11.03.070.

4. Yuan, L., Li, C., Li, S., Ma, X., Zhang, W., Liu, D., Wang, G., Chen, F., & Hou, X. (2022). Mine slope stability based on fusion technology of Insar Monitoring and numerical simulation. Scientific Programming, 2022, 1-10. https://doi.org/10.1155/2022/8643586.

5. Shcherbakov, P., Tymchenko, S., Bitimbayev, M., Sarybayev, N., & Moldabayev, S. (2021). Mathematical model to optimize drilling-and-blasting operations in the process of open-pit hard rock mining. Mining of Mineral Deposits, 15(2), 25-34. https://doi.org/10.33271/mining15.02.025.

6. Su, P., Qiu, P., Liu, B., Chen, W., & Su, S. (2022). Stability prediction and optimal angle of high slope in open-pit mine based on two-Dimension Limit equilibrium method and three-dimension numerical simulation. Physics and Chemistry of the Earth, Parts A/B/C, 127, 103151. https://doi.org/10.1016/j.pce.2022.103151.

7. Li, H., Zhang, Z., & Yang, W. (2021). Stability analysis of slope based on limit equilibrium method and strength reduction method. Annales De Chimie Science Des Matriaux, 45(5), 379-384. https://doi.org/10.18280/acsm.450503.

8. Sdvyzhkova, O., Babets, D., Moldabayev, S., Rysbekov, K., & Sarybayev, M. (2020). Mathematical modeling a stochastic variation of rock properties at an excavation design. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. https://doi.org/10.5593/sgem2020/1.2/s03.021.

9. Sdvyzhkova, O.O., Shashenko, O.M., & Kovrov, O.S. (2010). Modelling of the rock slope stability at the controlled failure. Proceedings of the European Rock Mechanics Symposium Switzerland: European Rock Mechanics Symposium, EUROCK 2010; Lausanne; Switzerland, 581-584.

10. Godoy, E., Boccardo, V., & Durn, M. (2017). A Dirichlet-to-Neumann finite element method for axisymmetric elastostatics in a semi-infinite domain. Journal of Computational Physics, 328, 1-26. https://doi.org/10.1016/j.jcp.2016.09.066.

11. Wijesinghe, D.R., Dyson, A., You, G., Khandelwal, M., Song,C., & Ooi, E. T. (2022). Development of the scaled boundary finite element method for image-based slope stability analysis. Computers and Geotechnics, 143, 104586. https://doi.org/10.1016/j.compgeo.2021.104586.

12. Karrech, A., Dong, X., Elchalakani, M., Basarir, H., Shahin,M.A., & Regenauer-Lieb, K. (2022). Limit analysis for the seismic stability of three-dimensional rock slopes using the generalized Hoek-Brown criterion. International Journal of Mining Science and Technology, 32(2), 237-245. https://doi.org/10.1016/j.ijmst.2021.10.005.

13. Lashgari, M., & Ozturk, C.A. (2021). Slope failure and stability investigations for an open pit copper mine in Turkey. Environmental Earth Sciences, 81(1). https://doi.org/10.1007/s12665-021-10125-7.

14. Gharehdaghi, M.S., Tehrani, H., & Fakher, A. (2020). Risk-based decision making method for selecting slope stabilization system in an abandoned open-pit mine. The Open Construction and Building Technology Journal, 14(1), 198-217. https://doi.org/10.2174/1874836802014010198.

15. Kang, K.-S., Hu, N.-L., Sin, C.-S., Rim, S.-H., Han, E.-C., & Kim, C.-N. (2017). Determination of the mechanical parameters of rock mass based on a GSI system and displacement back analysis. Journal of Geophysics and Engineering, 14(4), 939-948. https://doi.org/10.1088/1742-2140/aa6e78.

16. Sdvyzhkova, O., Babets, D., Kravchenko, K., & Smirnov, A. (2015). Rock state assessment at initial stage of longwall mining in terms of poor rocks of western Donbass. New Developments in Mining Engineering 2015: Theoretical and Practical Solutions of Mineral Resources Mining, 2015, 65-70.

17. Zuo, J., & Shen, J. (2020). The Hoek-Brown failure criterion. The Hoek-Brown Failure Criterion From Theory to Application, 1-16. https://doi.org/10.1007/978-981-15-1769-3_1.

18. Arshadnejad, Sh. (2018). Determination of mi in the HoekBrown failure criterion of rock. Mining Science, 25, 111-127. https://doi.org/10.5277/msc182509.

19. Fairhurst, C. (2014). Analysis and Design Methods: Comprehensive Rock Engineering: Principles, Practice and Projects. Elsevier. https://doi.org/10.1201/b16955-9.

20. Somodi, G., Bar, N., Kovcs, L., Arrieta, M., Trk, A., & Vsrhelyi, B. (2021). Study of rock mass rating (RMR) and Geological Strength index (GSI) correlations in granite, siltstone, sandstone and quartzite rock masses. Applied Sciences, 11(8), 3351. https://doi.org/10.3390/app11083351.

 

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ISSN (print) 2071-2227,
ISSN (online) 2223-2362.
Journal was registered by Ministry of Justice of Ukraine.
Registration number КВ No.17742-6592PR dated April 27, 2011.

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