SUBSTANTIATION OF RATIONAL ROOF-BOLTING PARAMETERS

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Authors:

R.M. Tereshchuk, Candidate of Technical Sciences, Associate Professor,National Mining University,Associate Professor of the Department of Construction, Geotechnics and Geomechanics,Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0003-4509-2511

N.V. Khoziaikina, Candidate of Technical Sciences, Associate Professor, National Mining University,Associate Professor of the Department of Construction, Geotechnics and Geomechanics, Dnipro, Ukraine, orcid.org/0000-0002-4747-3913

D.V. Babets, Candidate of Technical Sciences, Associate Professor, National Mining University,Professor of the Department of Higher Mathematics, Dnipro, Ukraine, orcid.org/0000-0002-5486-9268

Abstract:

Purpose. Toanalyse a state of border rock mass of permanent slope mine working in the process of roof-bolting mounting. To determine rational roof-bolting density as well as length of anchors in the deepening process in the context of  seam of Pioner mine (“DTEK Dobropolliavuhillia” Ltd).

Methodology. Roof-boltingparameters for the permanent slope mine workings were substantiated while analysing regularities of changes in behaviour and stress-strain state of rock mass and identifying displacements of rock contour of a mine working. Thereupon, rational values of anchor lengths and roof-bolting density based upon them were determined. To analyse changes in the behaviour and stress-strain state of border rock mass of permanent inclined mine working with roof-bolting, a finite-element method was applied.

Findings. A method to analyseboth behaviour and stress-strain state of border rock mass of permanent inclined mine workings in the context of roof-bolting mounting has been substantiated. The procedure of the problem solution while using developed software has been described. Calculation model to solve a problem concerning the determination of rational roof-bolting density and anchor lengths to support permanent inclined mine workings in the context of their depth changes has been developed. Rational parameters of roof-bolting while supporting permanent inclined mine workings under specific mining and geological conditions have been determined.

Originality. Graphs of dependences of roof rock border displacements and floor of permanent inclined mine working on its depth in terms of anchor length and roof-bolting density have been obtained.

Practical value. Results of the studiesmay be used at the design stage to forecast displacements of a roof, a floor and walls of permanent inclined mine workings under the conditions of  seam at Pioner mine to optimize roof-bolting parameters.

References.

1. Bulat, A. F., 2014. Advanced technologies for tunnel supporting in Ukrainian coal mines. Visnyk of the National Academy of Sciences of Ukraine, 1, pp. 74–79.

2. Bulat, A. F., Popovich, I. M., Vivcharenko, J. V. and Krukovskiy, O. P., 2014. Technology of bolting of mine workings at mines in Ukraine: state and prospects, Ugol Ukrainy, 2, pp. 3–7.

3. Krukovskiy, A. P., Khvorostian, V. A. and Krukovskaia, V. V., 2013. Technology of supporting bolting of mine workings. Ugol Ukrainy, 2, pp. 13–16.

4. Krukovskiy, A. P., 2014. Technology of supporting bolting of mine workings of coal mines. Zb. prac im.D.A.Kunaeva Nauchno-tekhnicheskoe obespechenie gornogo proizvodstva, 86, pp. 26–33.

5. Novikov, A. O. and Gladkiy, S. YU., 2015. Mathematical model of deformation state of roof rock in working, tip by anchors, Zb. nauk. prac Geo-Technikal Mechanics, 119, pp. 205–220.

6. Novikov, A. O. and Gladkiy, S. YU., 2015. Mathematical model of deformation state of rock wall in working, tip by anchors. In: Annual scientific-technical collection Mining of mineral deposits 2015, pp. 319–325.

7. Tereschuk, R. and Tereschuk, O., 2014. Determination of rational parameters for roof bolting of inclined workings. Up-to-date resource- and energy-saving technologies in mining industry. Research and production journal: Kremenchuk Mykhailo Ostrohradskyi National University, 2(14), pp. 104–113.

8. Ministry of Energy and Coal Mining of Ukraine, 2014. SOU 10.1.05411357.010:2014. System of providing reliable and safe functioning of roof-bolting mine workings. General technical requirements. Kyiv: Minenerhovuhillia Ukrainy.

9.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, pp. 1‒10. DOI: 10.1201/b16355-2.

10. Shashenko, O. M. and Kovrov, O. S., 2016, Comparative analysis of two failure criteria for rocks and massifs. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 6, pp. 54–59.

11.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, pp. 58–64.

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