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Distribution of displacements around a single mine working driven in stratified rock mass

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Category: Mining

Last Updated on 11 January 2018

Published on 11 January 2018

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Authors:

O.M. Shashenko, Doctor of Technical Sciences, Professor, National Mining University, 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.">This email address is being protected from spambots. You need JavaScript enabled to view it.

N.V. Khoziaikina, Candidate of Technical Science, 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.">This email address is being protected from spambots. You need JavaScript enabled to view it.

R.M. Tereshchuk, Candidate of Technical Science, 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.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. To estimate displacements in the neighborhood of a development working driven under mining and geological conditions of mines in Western Donbas and situated within the area of mining effect for further improvement of full-scale measurements being an important stage in the process of geomechanical model verification.

Methodology. A number of sequential operations of numerical modeling were involved making it possible to demonstrate deformational processes progressing in the neighborhood of “mine working-longwall” geotechnical system with a probability of 0.95 including those resulting in loss of elastoplastic resistance of marginal rock mass weakened either by mine working or by a network of underground cavities. Features of geomechanical processes taking place in the neighborhood of a mine working were analyzed with the help of complicated technical “mine working-pillar-rock mass” system being developed gradually within the rock mass.

Findings. The results of the numerical experiment helped determine rules of stratified rock mass formation around a mine working located within mining space effect in terms of difference levels of protective structure rigidness within longwall as well as estimate its effect on the integrity of entire geomechanical system.

Originality. For the first time the fact of both vertical and horizontal displacements of far point of deep benchmark station in the context of varying width of protective structure in longwall has been proved and their regularities have been determined.

Practical value. The determined regularities can be quite useful while estimating displacements of floor rocks and roof rocks in the process of full-scale measurements performed with the help of the leveling method.

References

1. Hoek, E., 2006. Rock mass classification. In: E.Hoek, 2006. Practical Rock Engineering. Ch. 11 [online]. Available at: <https://www.rocscience.com/documents/hoek/corner/Practical-Rock-Engineering-Full-Text.pdf> [Accessed 25 November 2016].

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3. Sdvyzhkova, О.О., Babets, D.V., Kravchenko, K.V. and Smirnov, A.V., 2016. Determining the displacements of rock mass nearby the dismantling chamber under effect of plow longwall. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, pp. 34–42.

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, pp. 58–64.

5. Gapieiev, S., Shashenko, A. and Solodyankin, A., 2010. Bifurcational model of rock bottom heaving in mine workings. In: New Techniques and Technologies in Mining. London: CRC Press / Balkema, рр. 71–76.

6. Shashenko, A. N., Pustovoitenko, V. P. and Sdvyzhkova, Ye. A., 2016. Geomechanics, Ukraine: Noviy druk.

7. Shashenko, O., Kovrov, O., Rakishev, B. and Mashanov, A., 2015. On the issue of analytical and empirical criteria application for rock failure assessment. In: Theoretical and Practical Solutions of Mineral resources Mining, Dnipro: Litograf, pр. 59–65.

8. Dmitrov, G.N., Khalimendik, Yu.M. and Baryshnikov, A.S., 2014. Improvement of the passport of maintaining first workings. Ugol Ukrainy, 4, pp. 3–6.

9. 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.

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