Krukovskyi O.P., Bulich Yu.Yu., Zemliana Yu.V. Modification of the roof bolt support technology in the conditions of increasing coal mining intensity

Geoteh. meh. 2019, 147, 62-72

https://doi.org/10.1051/e3sconf/201910900042

MODIFICATION OF THE ROOF BOLT SUPPORT TECHNOLOGY IN THE CONDITIONS OF INCREASING COAL MINING INTENSITY

1KrukovskyiO.P.,1BulichYu.Yu., 1ZemlianaYu.V.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC 622.281.74

Language: English

Abstract.

. At the present time, the combined roof bolt and frame supporting of mine workings is actively used in the coal mines of Ukraine in a wide range of geological conditions with almost no restrictions by the type, purpose, lifespan, section and location of mine workings in the rock massif. As was illustrated by practical experience, the high concentration of works in the mine working face constrains the rate of development, complicates the implementation of technological operations and leads to the technology violation and work safety. To ensure the intensification of mining operations, the existing technologies of the combined roof bolt and frame supporting should be improved in a such way, in order to reduce the concentration of works in mine working face, to make the primary roof bolts setting in the mine working face more convenient without violating the safety rules. The purpose of the work is to develop the technological schemes for the phased construction of bearing and roof bolt supporting of mine workings, to modify the technology roof bolt supporting of mine workings in the conditions of increasing the coal mining intensity.

The technological schemes have been developed for the phased construction of roof bolting and frame support. This schemes make it possible to temporarily postpone the setting of frames in the mine working face, reduce the time and labour intensity for covering with a grid of the mine working arch and setting the bolts, as well as to increase the safety. The analysis of changes in the stress state of the border massif during the phased construction of roof bolting and frame support has been made. It is shown that the technology of phased construction of roof bolting and frame support ensures the maintaining a stable state of host rocks. In addition, the time between the extraction of the coal-rock mass and the setting of the primary support, as well as the distance between the face and the first row of roof bolts has been reduced to a minimum. The suggested approach makes possible to ensure the rate of preparatory mine workings development that are necessary for the intensification coal mining. The new technology has been tested in the conditions of the Pavlogradska Mine and Stepna Mine, where the setting of frame supports and side roof bolts has been made with a certain lagging.

Keywords: technology roof bolt supporting, construction of roof bolting, stress state of the rocks, mine working face.

 

 

REFERENCES

  1. System of providing reliable and safe functioning of roof bolting mine workings. General technical requirements. (2014). Kyiv: Ministry of Energy and Coal Mining of Ukraine
  2. Bulat, A.F., Vinogradov, V.V. (2002). Oporno-ankernoe kreplenie gornyih vyirabotok ugolnyih shaht. Dnepropetrovsk: Vilpo
  3. Bulat, A.F., Popovych, I.M., Vivcharenko, O.V., Krukovskyi, O.P. (2014). Tekhnolohiia ankernoho kriplennia hirnychykh vyrobok na shakhtakh Ukrainy: stan i perspektyvy. Uhol Ukrayny, 2, 3–7
  4. Krukovskyi O.P. Application of roof bolting support in the Ukrainian mines / The 25th World Mining Congress 2018. Proceedings. Underground mining. – Astana: 2018. – P. 1451-1459.
  5. Yakovlev, D.V., Magdych, V.I., Egorov, A.P., Osminin, D.V., Markov, A.S. (2014). Prospects of development and implementation of stage-by-stage mine working roof bolting flow charts in Kuzbass mines. Ugol, 10, 40-44
  6. Demin, V.F., Yavorskiy, V.V., Demina, T.V., Chvanova, A.O. (2017). Substantiation of technological schemes of anchoring when conducting mining. International journal of applied and fundamental research, 6, 27-32
  7. Vynohradov, V.V., Krukovskyi, O.P. (2010). Oporno-ankerne kriplennia hirnychykh vyrobok vuhilnykh shakht Ukrainy. Geotehnicheskaya mehanika [Geo-Technical Mechanics], 88, 170-179
  8. Krukovskyi, A.P., Krukovskaia, V.V., Khvorostian V.A. (2013). Tekhnolohyia oporno-ankernoho kreplenyia hornykh vyrabotok uholnykh shakht Ukrayny. Uhol Ukrayny, 2, 13-16
  9. Nguyen, V.M., Nguyen, Q.P. (2015), “Analytical solution for estimating the stand-up time of the rock mass surrounding tunnel”, Tunnelling and Underground Space Technology, Vol. 47, pp. 10-15.
  10. Seryakov, V.M. (2015), “Calculating stress state of support and sidewall rocks in stagewise face drivage in long excavations”, Journal of Mining Sciences, Vol. 51, pp. 673-678.
  11. Zienkiewicz, O.C., Taylor, R. L., Zhu J. Z. (2013). The Finite Element Method: Its Basis and Fundamentals, Butterworth-Heinemann.
  12. Krukovskyi, O.P. (2011). Modelling changes of stress-strain state of solid edge during the distance of working face of mine workings. Problemy obchysliuvalnoi mekhaniky i mitsnosti konstruktsii[Problems of computational mechanics and strength of structures], 17, 175-181
  13. de Borst, R., Crisfield, M.A., Remmers, J.J.C., Verhoosel, C.V. (2012). Non-linear finite element analysis of solids and structures, John Wiley & Sons.
  14. Kovalevska, I., Symanovych, G., Fomychov, V. (2013). Research of stress-strain state of cracked coal-containing massif near-the-working area using finite elements technique, Annual Scientific-Technical Collection–Mining of Mineral Deposits, 159-163

About the authors

Krukovskyi Oleksandr Petrovych, Corresponding Member of NAS of Ukraine, Doctor of Technical Sciences (D. Sc.), Deputy Director of the Institute, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine ), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Bulich Yurii Yuriovych, Master of Science, Researcher of Department of Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine

Zemliana Yuliia Valeriivna, Master of Science, Chief Technologist in Department of Rock Mechanics Department, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine