Determining stability conditions for haulage drifts protected by coal pillars

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.216530

Keywords:

rock pressure, haulage drift, coal pillar, deformations, coal-bearing massif, roof

Abstract

The aim of this research is to study the stability of haulage drifts and the manifestations of rock pressure in them lengthwise the working area when protecting them with coal pillars.

To assess the stability of workings, field experiments were conducted to study the manifestations of rock pressure in the haulage drifts of a steep coal seam. It has been registered that as the breakage face progresses, the displacement of roof rocks on the contour of the drift linearly increases with an increase in the length of the working area.

The deformation properties of coal pillars were studied taking into consideration the extent of the convergence of the roof and soil. This paper reports a theoretical model that describes the destruction of the above-drift coal pillars when unloading the coal-bearing massif that hosts the workings.

It has been determined that the equilibrium state of coal pillars is ensured when the specific deformation and stress potentials are equal before the occurrence of main cracks of destruction. As the relative deformation of coal pillars increases at compression, when this equality is broken, the specific energy intensity of destruction increases. It is noted that at a distance exceeding l>10 m behind the breakage face, the occurrence of the main cracks of destruction is followed by a stability loss in the coal pillars. As a result of external forces, the change in the volume and shape of the coal pillars causes the intensification of the process of convergence of lateral rocks on the contour of haulage drifts lengthwise the working area and leads, with a certain degree of probability, to a deterioration in the stability of workings.

The results of this study could be used to justify the choice of technique to protect haulage drifts. This would allow the timely development of minefield reserves thereby improving the safety of operations. It is recommended that the technique of protecting haulage drifts by coal pillars should be abandoned

Author Biographies

Igor Iordanov, LLC Manufacturing Company ELTEKO Oleksy Tykhoho str., 3, Kostiantynivka, Ukraine, 85103

PhD, General Director

Yuliia Novikova, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

PhD, Associate Professor

Department of Higher Mathematics and Physics

Yuliia Simonova, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

Postgraduate Student

Department of Mining of Mineral Deposits

Anton Korol, DTEK LLC Krasnoarmiyska str., 1a, Dobropillia, Ukraine, 85043

Engineer

Yevgen Podkopayev, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

Postgraduate Student

Department of Mining of Mineral Deposits

Oleksiy Kayun, LLC Manufacturing Company ELTEKO Oleksy Tykhoho str., 3, Kostiantynivka, Ukraine, 85103

Engineer

Vitaliy Dovgal, State Property Fund of Ukraine Henerala Almazova str., 18/9, Kyiv, Ukraine, 01133

Adviser to the Head

Hennadii Boichenko, Svyato-Pokrovskaya No. 3 Mine LLC Shybankova sq., 1а, Pokrovsk, Ukraine, 85300

Director

Maksym Hryhorets, Donetsk National Technical University Shybankova sq., 2, Pokrovsk, Ukraine, 85300

Postgraduate Student

Department of Mining of Mineral Deposits

References

  1. Viktorov, S. D., Iofis, M. A., Goncharov, S. A. (2005). Sdvizhenie i razrushenie gornyh porod. Moscow: Nauka, 277. Available at: https://www.twirpx.com/file/1912211/
  2. Liashok, Y., Iordanov, I., Chepiga, D., Podkopaiev, S. (2018). Experimental studies of the seam openings competence in different methods of protection under pitch and steep coal seams development. Mining of Mineral Deposits, 12 (4), 9–19. doi: https://doi.org/10.15407/mining12.04.009
  3. Kanin, V. A., Hodyrev, E. D., Galemskiy, P. V. (2012). Operezhayushchaya razrabotka zashchitnyh plastov dlya predotvrashcheniya vybrosov peschanikov pri provedenii podgotovitel'nyh vyrabotok. Transactions of UkrNDMI NAN Ukraine, 11, 239–250. Available at: http://dspace.nbuv.gov.ua/bitstream/handle/123456789/57120/19-Kanin.pdf?sequence=1
  4. Vlasenko, D. S., Rodichev, A. S. (2014). Determination of the intensity rock preassure in protecting mine workings by using of width less than 15 m. Gorniy informatsionno-analiticheskiy byulleten', 3, 135–139. Available at: https://cyberleninka.ru/article/n/opredelenie-intensivnosti-gornogo-davleniya-pri-ohrane-vyrabotok-tselikami-shirinoy-menee-15-m/viewer
  5. Kazikaev, D. M., Kazyrev, A. A., Kaspar'yan, E. V., Iofis, M. A. (2016). Upravlenie geomehanicheskimi protsessami pri razrabotke mestorozhdeniy poleznyh iskopaemyh. Moscow: Izd-vo «Gornaya kniga», 490. Available at: https://www.twirpx.com/file/2860645/
  6. Artem'ev, V. B., Korshunov, G. I., Loginov, A. K. et. al. (2009). Ohrana podgotovitel'nyh vyrabotok tselikami na ugol'nyh shahtah. Sankt-Peterburg: Nauka, 229.
  7. Zborshchik, M. P. (1984). Upravlenie gornym davleniem pri ohrane osnovnyh podgotovitel'nyh vyrabotok v zonah razgruzki. Razrabotka mestorozhdeniy poleznyh iskopaemyh, 69, 8–14.
  8. Shvarger, N. Yu., Kalinichenko, V. A., Malanchuk, E. Z. (2010). Kineticheskie protsessy v massive gornyh porod pri obrazovanii polosti. Bulletin of Engineering Academy of Ukraine, 3-4, 61–65. Available at: http://nbuv.gov.ua/j-pdf/Viau_2010_3-4_14.pdf
  9. Kuznetsov, G. N., Bud'ko, I. N. (1971). Issledovanie predel'nyh sostoyaniy hrupkogo materiala v razlichnyh usloviyah trehosnogo szhatiya. V kn. Problemy mehaniki gornyh porod. Novosibirsk: Izd-vo IGD SO AN SSSR.
  10. Viktorov, S. D., Goncharov, S. A., Iofis, M. A., Zakalinskiy, V. M. (2019). Mehanika sdvizheniya i razrusheniya gornyh porod. Moscow: RAN, 360. Available at: http://www.ras.ru/FStorage/Download.aspx?id=96c79def-d4aa-4145-9116-53f6ac414ebc
  11. Struzhanov, V. V., Burmasheva, N. V. (2019). Teoriya uprugosti: osnovnye polozheniya. Ekaterinburg: Izd-vo Ural. un-ta, 204. Available at: https://elar.urfu.ru/bitstream/10995/68501/1/978-5-7996-2541-2_2019.pdf
  12. Kochergarov, G. G. (2000). Energiya i mehanizm kvazimikroplasticheskoy deformatsii tverdyh tel. Pis'ma v ZhTF, 26 (11), 41–46.
  13. Meshkov, Yu. Ya. (2001). The Concept of a Critical Density of Energy in Models of Fracture of Solids. Uspehi Fiziki Metallov, 2 (1), 7–50. doi: https://doi.org/10.15407/ufm.02.01.007
  14. Köster, W. (1943). Die Querkontraktionszahl im periodischen System. Elektrochem, 49 (4-5), 233–237. Available at: https://onlinelibrary.wiley.com/doi/abs/10.1002/bbpc.19430490413
  15. Zwikker, C., Smoluchowski, R. (1955). Physical Properties of Solid Materials. Physics Today, 8 (2), 17–17. doi: https://doi.org/10.1063/1.3061913
  16. Semenov, V. A. (2013). Teoriya veroyatnostey i matematicheskaya statistika. Sankt-Peterburg: Piter, 192. Available at: https://www.studmed.ru/semenov-v-a-teoriya-veroyatnostey-i-matematicheskaya-statistika_11044b029e5.html
  17. Sveshnikov, A. (2012). Prikladnye metody teorii veroyatnostey. Sankt-Peterburg: Izd-vo Lan', 480. Available at: https://e.lanbook.com/book/3184
  18. Barber, J. R. (2011). Intermediate Mechanics of Materials. Springer, 618. doi: https://doi.org/10.1007/978-94-007-0295-0
  19. Potapova, L. B., Yartsev, V. P. (2005). Mehanika materialov pri slozhnom napryazhennom sostoyanii. Moscow: Izd-vo «Mashinostroenie», 244. Available at: https://www.tstu.ru/book/elib/pdf/2005/potapova.pdf
  20. Taboga, M. (2017). Lectures on Probability Theory and Mathematical Statistics. CreateSpace Independent Publishing Platform, 670. Available at: https://www.amazon.com/Lectures-Probability-Theory-Mathematical-Statistics/dp/1981369198
  21. Shashenko, A. N. (2016). Mehanika gornyh porod. Dnepropetrovsk: Natsional'niy gorniy universitet, 347. Available at: https://www.twirpx.com/file/305703/
  22. Polyanin, A. D., Zaytsev, V. F. (2002). Spravochnik po nelineynym uravneniyam matematicheskoy fiziki. Moscow: Fizmatlit, 432. Available at: https://www.twirpx.com/file/114870/
  23. Borovkov, A. (2010). Matematicheskaya statistika. Sankt-Peterburg: Izd-vo Lan', 704. Available at: https://e.lanbook.com/book/3810

Downloads

Published

2020-12-31

How to Cite

Iordanov, I., Novikova, Y., Simonova, Y., Korol, A., Podkopayev, Y., Kayun, O., Dovgal, V., Boichenko, H., & Hryhorets, M. (2020). Determining stability conditions for haulage drifts protected by coal pillars. Eastern-European Journal of Enterprise Technologies, 6(1 (108), 72–81. https://doi.org/10.15587/1729-4061.2020.216530

Issue

Section

Engineering technological systems