Mining of Mineral Deposits

ISSN 2415-3443 (Online)

ISSN 2415-3435 (Print)

Flag Counter

Hydro and geomechanical stability assessment of the bund wall bottom slope of the Dniprovsk tailing dump

V. Tymoshchuk1, V. Tishkov1, Yu. Soroka2

1National Mining University, Dnipro, Ukraine

2Dnipro State Technical University, Kamianske, Ukraine


Min. miner. depos. 2018, 12(1):39-47


https://doi.org/10.15407/mining12.01.039

Full text (PDF)


      ABSTRACT

      Purpose. The objective is to assess the stability of bund wall components of a hydro-technical structure under the conditions of a tailing dump which hydrodynamic mode has been disrupted during operation. The specified data on the geomechanical state, physical and mechanical properties have been used of both the bund wall material and that of the soil base.

      Methods. Mathematical modeling by means of finite element method has been used to assess the hydro and geomechanical stability of bund wall components of a tailing dump (flood-breaking dam). The most reliable software Phase 2 v.8.0 was used for simulating. The modeling takes into consideration the influence of hydrostatic weighing forces and hydrodynamic pressure as well as nonstabilized state of water-logged rocks in the bund wall body.

      Findings. Based on the results of assessments, geomechanical stability margin of the bund wall components of a tailing dump has been determined. It has been shown that on an equal height of the bund wall, the areas with insigni-ficant angles of bottom slopes horizontal equivalent are characterized by the greater stability margin, and their resistance to shear deformation factor is comparable to the strength of alluvial sands shear in the base of a dam. In this context, stability margin is connected with the controlling influence on the bund wall state of water-logged soils, located above the ground water table in the dam body.

      Originality. It has been determined that the hydro and geomechanical state of the bund wall components of the hydro and technical structure is influenced by the occurrence within the bounds of the tailing dump bund wall of alternately water-logged rock material intervals located above the ground water fixed position.

      Practical implications. The results of modeling the tailing dump hydro and geomechanical state, which consider the multifactor conditioning of hydrodynamic and deformation processes in a body of the bund wall components, are the basis to substantiate a complex of engineering measures directed at the ensuring further safe operation of the hydro and technical structure.

      Keywords: technical structure, bund wall, geomechanical stability, numerical modeling, stability margin


      REFERENCES

Abellán, A., Oppikofer, T., Jaboyedoff, M., Rosser, N.J., Lim, M., & Lato, M.J. (2013). Terrestrial Laser Scanning of Rock Slope Instabilities. Earth Surface Processes and Landforms, 39(1), 80-97.
https://doi.org/10.1002/esp.3493

Buiskikh, A.A., & Zamoshch, M.N. (2010). Prediction of Thermal Regime Within a Tailing Dump under Permafrost. Journal of Mining Science, 46(1), 28-33.
https://doi.org/10.1007/s10913-010-0004-y

Chanyshev, A.I., & Abdulin, I.M. (2014). Stress-Strain State of Enclosing Rock Mass Around an Arbitrary Cross-Section Excavation by Measurement of Displacements of the Excavation Walls. Journal of Mining Science, 50(1), 18-24.
https://doi.org/10.1134/s1062739114010037

DBN-B.2.1-10-2009. (2009). The Basis of the Foundations of the Dispute. The Main Point of the Project is the Draft. Kyiv: Ministry of Regional Development, Building and Housing of Ukraine.

Duncan, J.M. (2000). Factors of Safety and Reliability in Geotechnical Engineering. Journal of Geotechnical & Geoenvironmental Engineering, 126(4), 307-316.
https://doi.org/10.1061/(asce)1090-0241(2000)126:4(307)

Epov, M.I., Yurkevich, N.V., Bortnikova, S.B., Karin, Y.G., & Saeva, O.P. (2017). Analysis of Mine Waste by Geocheimical and Geophysical Methods (A Case Study of the Mine Tailing Dump of the Salair Ore-processing Plant). Russian Geology and Geophysics, 58(12), 1543-1552.
https://doi.org/10.1016/j.rgg.2017.11.014

Galperin, A.M. (2003). Geomechanics of Open Mining. Moscow: Moscow State Mining University.

Huang, C.C. (2013). Developing a New Slice Method for Slope Displacement Analyses. Engineering Geology, (157), 39-47.
https://doi.org/10.1016/j.enggeo.2013.01.018

Ignjatovic, D., Djurdjevac-Ignjatovic, L., & Ljubojev, M. (2013). Effect of Displacement the Flotation Dam 2 on the Route of Future Collector of the Krivelj River, Tested Using the Software Phase 2 V8.0. Mining and Metallurgy Engineering Bor, (4), 17-28.
https://doi.org/10.5937/mmeb1304017i

Ivochkina, M. (2013). Study of Formation of Properties of Technogenic Deposits in Phosphogypsum Dumps During Processing of Raw Materials of Various Deposits. Engineer’s Messenger of the Don, 1(24), 48-54.

Krupskaya, L.T., Bubnova, M.B., Zvereva, V.P., & Krupskiy, A.V. (2011). Characteristics of Mining-Ecological Monitoring of Environmental Objects Changing Under the Influence of Toxic Waste Tailing Dump (“Solnechny GOK” Company). Environmental Monitoring and Assessment, 184(5), 2775-2781.
https://doi.org/10.1007/s10661-011-2150-3

Mironenko, V.A., & Strelskiy, F.P. (1989). Practical Application of the Principles of Hydrogeomechanics in Order to Increase the Industrial and Environmental Safety of Mining Operations. Inzhenernaya Geologiya, (5), 3-14.

Sánchez, M., Wang, D., Briaud, J.-L., & Douglas, C. (2014). Typical Geomechanical Problems Associated with RailRoads on Shrink-swell Soils. Transportation Geotechnics, 1(4), 257-274.
https://doi.org/10.1016/j.trgeo.2014.07.002

Tymoshchuk, V.I., Sherstiuk, Ye.A., & Tishkov, V.V. (2013). Hydrodynamic Substantiation of Water Control Measures at the Site of Sludge Collector in Yasinovaya Valley, Dnipropetrovsk Oblast. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (3), 5-10.

Whiteley, J. (2017). Finite Element Methods: A Practical Guide. Switzerland: Springer International Publishing AG.
https://doi.org/10.1007/978-3-319-49971-0

Xu, N.W., Dai, F., Liang, Z.Z., Zhou, Z., Sha, C., & Tang, C.A. (2013). The Dynamic Evaluation of Rock Slope Stability Considering the Effects of Microseismic Damage. Rock Mechanics and Rock Engineering, 47(2), 621-642.
https://doi.org/10.1007/s00603-013-0432-5

Yang, X., Hou, D., Tao, Z., Peng, Y., & Shi, H. (2015). Stability and Remote Real-Time Monitoring of the Slope Slide Body in the Luoshan Mining Area. International Journal of Mining Science and Technology, 25(5), 761-765.
https://doi.org/10.1016/j.ijmst.2015.07.010

Лицензия Creative Commons