Analysis of calculation models while solving geomechanical problems in elastic approach
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- Category: Development of fields
- Last Updated on Wednesday, 20 March 2019 14:33
- Published on Friday, 08 March 2019 09:53
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Authors:
O.M.Shashenko, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-7012-6157, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
S.M.Hapieiev, Dr. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-0203-7424, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
V.G.Shapoval, Dr. Sc. (Tech.), Prof., orcid.org/0000-0003-2993-1311,Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
O.V.Khalymendyk, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0002-1311-1135,Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract:
Purpose. Tocarryout comparative analysis of results concerning determination of stress-strain state (SSS) of shallow mine workings using calculation models for problems in elastic approach.
Methodology. Rock mechanics methods; methods of analysis of the results of theoretical calculations and numerical experiments using FEM.
Findings. Algorithm to calculate SSS of rock mass, involving extended mine working, has been substantiated. Numerical experiment has demonstrated that to determine displacements within a mine working boundary it is required to consider plane strain state. It has been identified that the use of a plane stress state results in misinterpreted values of mine working boundary displacements to compare with accurate ones. The following basic conclusion has been made: it is possible to use adequate three-dimensional (i.e. spatial) problem while arranging relations according to certain rules to solve the considered problem with a calculation model of limited length as for the research subject.
Originality. Divergencehas been determined between extended mine working boundary displacements calculated using calculation models of a plane stress state (approximate analytical model), and those of a plane strain (accurate calculation model). It has been demonstrated that calculation of extended mine workings should involve analytical model of a plane deformation reflecting SSS of rock mass-mine working system adequately; otherwise, calculation errors may be more than 100 % for horizontal displacements, and 25 % for vertical ones.
Practical value. The obtained results make it possible to select reasonably calculation models for extended mine workings where support stiffness properties vary periodically. For instance, such mine workings are meant whose stability and deformability are provided by frame, anchor, combined frame-anchor, complete reinforced-concrete, reinforced equally distanced sequences of anchors, and similar support structures.
References.
1. Babets, D., 2018. Rock Mass Strength Estimation Using Structural Factor Based on Statistical Strength Theory. Solid State Phenomena, 277, pp. 111‒122.
2. Dychkovskyi, R. O., Lozynskyi, V. H., Saik, P. B., Petlovanyi, M. V., Malanchuk, Y. Z. and R. Malanchuk, Z., 2018. Modeling of the disjunctive geological fault influence on the exploitation wells stability during underground coal gasification. Archives of Civil and Mechanical Engineering, 18(4), pp. 1183–1197. DOI:10.1016/ j.acme.2018.01.012.
3. Sdvyzhkova, О. and Patynska, R., 2016. Effect of increasing mining on longwall coal mining. Western Donbass case study, 2016. Studia geotechnika et mechanika, 38(1), pp. 91‒99.
4. Babets, D. V., Sdvyzhkova, О. О., Larionov, M. H. and Tereshchuk, R. M., 2017. Estimation of rock mass stability based on probability approach and rating systems. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, pр. 58–64.
5. Pivnyak, G., Dychkovskyi, R., Smirnov, A. and Cherednichenko, Y., 2013. Some aspects on the software simulation implementation in thin coal seams mining. Energy Efficiency Improvement of Geotechnical Systems, pр. 1‒10.
6. Solodyankin, O. V., Hryhoriev, O. Y., Dudka, I. V. and Mashurka, S. V., 2017. Criterion to select rational parameters of supports to reduce expenditures connected with construction and maintenance of development working. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, pp. 19‒27.
7. Krukovskyi, O., Krukovska, V. and Vynohradov, Y., 2017. Mathematical modeling of unsteady water filtration into anchored mine opening. Mining of Mineral Deposits, 11(2), pp. 21‒27.
8. Solodyankin, O. V., Hryhoriev, O. Y., Khalimendik, A. V. and Mashurka, S. V., 2015. In-mine investigation of geomechanical processes near the local workings in the state enterprise “Yuzhnodonbasskaya №1 Mine” Coal Company”. Geo-Technical Mechanics, 123, pp. 87‒98.
9. Grigoriev, О., Tereschuk, R. and Tokar, L., 2015. Assessment of efficiency AMS-A (anchor – meshwork – shotcretihg) support structure in terms of coal mines. In: Theoretical and practical solutions of mineral resources mining. Netherlands: CRC Press, Balkema, pp. 85–89.
10. Solodyankin, O., Hapieiev, S., Vygodin, M. and Yanko, V., 2017. Energy Efficient Technologies to Support Mine Workings under Complicated Geomechanical Conditions. Advanced Engineering Forum, 25, pp. 35‒42.
11. Tereschuk, R., Grigoriev, O., Tokar, L. and Tikhonenko, V., 2014. Control of stability of mine workings equipped with roof bolting. In: New Developments in Mining Engineering 2015: Theoretical and Practical Solutions of Mineral Resources Mining. Balkema, pp. 411–415.
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