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Abstract

We examine the impact of overburden geomechanical properties on the velocity of the excavator rotary movement Vb and on the excavator current consumption Imax for two different states of excavator teeth: new excavator teeth and worn-out teeth after minimum 250h of work. The analysed dataset is collected from recordings made by the bucket-wheel excavator SchRs 900 25/6 operating at “Tamnava Eastern field” open-pit coal mine in Serbia. The following geomechanical properties of the overburden are examined: grain size composition, unit weight, cohesion and angle of internal friction. Using multiple linear regression analysis, we develop explicit mathematical correlations between Imax and Vb and the overburden properties in a form of nonlinear equations for the case of new excavator teeth, while statistically significant correlation for the worn-out teeth is obtained only between overburden geomechanical properties and Imax. Results obtained indicate the existence of statistically significant two-factor interactions with positive effect of overburden unit weight and angle of internal friction on Imax and Vb, while cohesion is generally inversely proportional to the analysed outputs. Analysis performed enables optimized planning of the excavator performance regarding its productivity during the overburden excavation.
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Bibliography

[1] S. Vujić et al. (Eds.), Serbian mining and geology in the second half of the XX century. 2014 Academy of Engineering Science of Serbia, Matica Srpska and Mining Institute, Belgrade.
[2] M. Hummel, Comparison of existing open coal mining methods in some countries over the world and in Europe. J. Min. Sci. 48, 146-153 (2012). DOI : https://doi.org/10.1134/S1062739148010169
[3] K. Kavouridis, Lignite industry in Greece within a world context: mining, energy supply and environment. Energ. Policy 36, 1257-1272 (2008). DOI : https://doi.org/10.1016/j.enpol.2007.11.017
[4] B. Scott, P.G. Ranjith, S.K. Choi, M. Khandelwal, A review on existing opencast coal mining methods within Australia. J. Min. Sci. 46, 280-297 (2010). DOI : https://doi.org/10.1007/s10913-010-0036-3
[5] O .N. Mashkovich, D.I. Fedorov, Working hard rocks with a bucket-wheel excavator. Sov. Min. Sci. 4, 49-52 (1968). DOI : https://doi.org/10.1007/BF02501984
[6] A . Inal, The development of diggability index for bucket wheel excavators. MSc Thesis, The University of New South Wales, School of Mining Engineering, Faculty of Applied Science, Sidney, Australia, (1984).
[7] J.R. Coleman, C.F.R. Fitzhardinge, Geotechnology of excavation equipment selection with particular emphasis on bucket wheel excavators. In: National conference publication – Institution of Engineers, Australia 1979.
[8] N . Bolukbassi, O. Koncagul, A. Gunhan Passamehmetoglu, Correlation of rock properties and cutting resistances in assessment of diggability with bucket-wheel excavators. T. In. Min. Metall A. 100, 189-193 (1991).
[9] D. Scheffler, Laboratory and in-situ methods of measurement as the basis for predicting cutting resistances in mining machines. Zkg Int. 50 (7), 347-352 (1997).
[10] K. Dey, A.K. Ghose, Review of cuttability indices and a new rockmass classification approach for selection of surface miners. Rock Mech. Rock Eng. 44, 601-611 (2011). DOI : https://doi.org/10.1007/s00603-011-0147-4
[11] S.H. Suryo, A.P. Bayuseno, J. Jamari, A. Imam Wahyudi, Analysis of Rake Angle Effect to Stress Distribution on Excavator Bucket Teeth Using Finite Element Method. Civil Engineering Journal-Tehran 3, 1222-1234 (2017).
[12] O . Tomuş, A. Andraş, D. Jula, S. Dinescu, Aspects relating to the reliability calculation of the cutting-teeth mounted on the bucket wheel excavators used in lignite mining. MATE C Web Conf.Volume 290, 9th International Conference on Manufacturing Science and Education – MSE 2019 “Trends in New Industrial Revolution” 01020, 1-8 (2019).
[13] M. Menegaki, T. Michalakopoulos, Exploring the effect of physical, human and technical factors on bucket wheel excavators’ efficiency: a fuzzy cognitive map approach. Int. J. Min. Miner. Eng. 10, 189-204 (2019). DOI : https://doi.org/10.1504/IJMME.2019.104447
[14] S. Kostić, N. Vasović, D. Jevremović, Stability of earth slopes under the effect of main environmental properties of weathered clay-marl deposits in Belgrade (Serbia). Environ. Earth Sci. 75, 492, 1-10, (2016). DOI : https://doi.org/10.1007/s12665-016-5339-5
[15] S. Kostić, Analytical models for estimation of slope stability in homogeneous intact and jointed rock mass with a single joint. Int. J. Geomech. 17 (10), 04017089 (2017). DOI : https://doi.org/10.1061/(ASCE)GM.1943-5622.0000994
[16] S. Kostić, J. Trivan, N. Gojković, Estimation of coal cutting force based on the impact of geomechanical factors. In: V. Litvinenko (Ed.) EURO CK2018: Geomechanics and Geodynamics of Rock Masses, CRC Press, Taylor and Francis Group (2018).
[17] J. Trivan, S. Kostić, M. Šalović, Calibration of excavator cutting force and energy consumption considering the impact of the overburden mechanical properties. In: S. Vujić et al. (Eds.) Proceedings of VIII Balkanmine (2022) (in press).
[18] D. Ignjatović, Choice of the method for determining the cutting resistance using rotary bucket-wheel excavators in conditions of open pit lignite mines of Kolubara. MSc Thesis, University of Belgrade Faculty of Mining and Geology, Serbia (1993).
[19] M.A. Oskouei, K. Aquah-Offei, Statistical methods for evaluating the effect of operators on energy efficiency of mining machines. Mining Technology, Transactions of the Institutions of Mining and Metallurgy, Section A, 123, 4, 1-8 (2014).
[20] H. Trenchard, M. Perc, Energy saving mechanisms, collective behavior and the variation range hypothesis in biological systems: A review. BioSystems 147, 40-66 (2016).
[21] L . Dong D. Sun, G. Han, X. Li, Q. Hu, L. Shu, Velocity-free Localization of Autonomous Driverless Vehicles in Underground Intelligent Mines. IEEE Transactions on Vehicular Technology 69, 9292-9303 (2020).
[22] L . Dong, X. Tong, X. Li, J. Zhou, S. Wang, B. Liu. Some developments and new insights of environmental problems and deep mining strategy for cleaner production in mines. Journal of Cleaner Production 210, 1562-1578 (2018).
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Authors and Affiliations

Srđan Kostić
1
ORCID: ORCID
Jelena Trivan
2
ORCID: ORCID

  1. Jaroslav Černi Water Institute, Serbia
  2. University of Banja Luka, Faculty of Mining Prijedor, Bosnia and Herzegovina

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