Saint-Petersburg Mining University, Russia:

Gabov V. V., Professor, Doctor of Engineering Sciences
Zadkov D. A., Associate Professor, Candidate of Engineering Sciences, dzadkov@yandex.ru
Babyr N. V., Assistant, Ph.D. in Engineering Sciences

Jiangsu University, School of Mechanical Engineering, China:

Fangwei Xie, Professor, Ph.D.

The paper considers the advisability of continuous nonimpact regulation of powered support unit hydraulic props resistance to roof rock subsidence. It also examined the advisability of increasing the adaptability of the powered support within advanced high-powered mechanized longwall face complexes to mining-geological conditions that change as the blocks are extracted. A four-level characteristic with nonimpact regulation is proposed instead of a typical three-level operating characteristic of the support unit hydraulic prop with impact regulation of its resistance to roof rock subsidence. Such operation modes of hydraulic props with the power fluid displacement into the power support pressure pipe can be provided by a nonimpact resistance control unit. The paper presents the structure, connection diagram, and embodiment of the control unit. The production and in-mine testing of the MKYU 2SH13/27 powered support unit hydraulic prop equipped with a prototype control unit were carried out on OOO Zavod Krasny Oktyabr loading test bench and in the A. D. Ruban mine of AO SUEK-Kuzbass. The testing data is presented in the paper. The possibility of rock pressure energy recovery into the hydraulic system of the longwall power support has been proved.

1. Peng S. S. Longwall Mining. U.S. : 2^nd edition, 2006. p. 621.
2. Jonathon C. Ralston, David C. Reid, Mark T. Dunn, David W. Hainsworth. Longwall automation: Delivering enabling technology to achieve safer and more productive underground mining. International Journal of Mining Science and Technology. 2015. Vol. 25(6). pp. 865–876.
3. Slusage R., Falat S. Face supports of production of mining machines "GLINIK" plant for Russian coal industry. Ugol. 2006. No. 4. pp. 21–24.
4. Linnik Yu. N., Krashkin I. S., Merzlyakov V. G. et al. Concept of development of purification, sinking, conveyor and drilling equipment for the period to 2020. Mining equipment and electromechanics. 2006. No. 2. pp. 2–12.
5. Remezov A. V., Klimov V. G., Lupij S. M. Overall performance of the mines created under the progressive scheme mine-layer, mine-clearing a face. Ugol. 2007. No. 10. pp. 48–50.
6. Kazanin O. I. On the design features of underground multiple gassy coal seam mining. Zapiski Gornogo instituta. 2015. Vol. 215. pp. 38–45.
7. Zubov V. P. Status and directions of improvement of development systems of coal seams on perspective Kuzbass coal mines. Zapiski Gornogo instituta. 2017. Vol. 225. рp. 292–297.
8. Yutyaev E. P. Present-day challenges and prospects of flat gas containing coal beds underground mining technology. Ugol. 2017. No. 5. pp. 30–36.
9. Ralston J. C., Reid D. C., Dunn M. T., Hainsworth David W. Longwall automation: Delivering enabling technology to achieve safer and more productive underground mining. International Journal of Mining Science and Technology. 2015. Vol. 25(6). pp. 865–876.
10. Nguyen V. X., Nguyen K. L., Lykov Y. V. Increasing the coarse coal fractions yield during coal mining using shearer cutting drums. IOP Conference Series: Earth and Environmental Science. 2019. DOI: 10.1088/1755-1315/378/1/012095
11. Sidorenko A. A., Sirenko Yu. G., Sidorenko S. A., Influence of face advance rate on geomechanical and gas-dynamic processes in longwalls in gassy mines. Eurasian Mining. 2018. No. 1. pp. 3–8. DOI: 10.17580/em.2018.01.01
12. Pavlenko M. V., Khaidina M. P., Kuziev D. A., Pihtorinskiy D. et al. Impacts of the combine harvester in the production of coal to increase methane recovery array in the workspace lava. Ugol. 2019. No. 4. pp. 8–11.
13. Martens P. N., Rattmann L., Janssen S., Kratz T. Advances in Longwall Mining. 22^nd World Mining Congress & Expo. Istambul. 2011. Vol. 1. pp. 85–96.
14. Shabarov A. N., Tsirel S. V. Geodynamic safety in underground mining. Gornyi Zhurnal. 2017. No. 9. pp. 65–70. DOI: 10.17580/gzh.2017.09.12
15. Remezov A. V., Klimov V. V. Investigation of stope abutment pressure and high rock pressure zones influence on mining workings. Bulletin of the Kuzbass State Technical University. 2011. No. 4. pp. 40–43.
16. Zubov V. P., Nikiforov A. V. Features of development of superimposed coal seams in zones of disjunctive geological disturbances. International Journal of Applied Engineering Research. 2017. Vol. 12, No. 5. pp. 765–768.
17. Zubov V. P., Nikiforov A. V., Kovalsky E. R. Influence of geological faults on planning mining operations in contiguous seams. Ecology. Environment and Conservation. 2017. Vol. 23, No. 2. pp. 1176–1180.
18. Torro V. O., Suprunenko A. N., Remezov A. V., Kuznetsov E. V. Determination of trends in underground mining technologies for recovery of thick flat-lying coal seams. Izvestija Tulskogo Gosudarstvennogo Universiteta. Nauki o Zemle. 2019. No. 2. pp. 204–220.
19. Buyalich G. D., Tarasov V. M., Tarasova N. I., Tarasov D. V. Improving mining operations safety in the process of powered support sections interaction with the wall rocks in the longwall area. Ugol. 2016. No. 10. pp. 26–30.
20. Kharitonov I. L., Tereshkin A. I., Kornev A. V., Korshunov G. I., Korneva M. V. Development of measures on the improvement of dust environment in the coal mines working faces. Occupational Safety in Industry. 2019. No. 12. pp. 53–59.
21. Kazanin O. I., Korshunov G. I., Rudakov M. L. The implementation of modern occupational safety and health system as an element of sustainable development of coal mining enterprises. Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects – 11^th conference of the Russian-German Raw Materials. Potsdam : CRC Press. 2018. pp. 571–578.
22. Kazanin O. I., Sidorenko A. A., Meshkov A. A. Organizational and technological principles of realization of the modern high productive longwall equipment capacity. Ugol. 2019. No. 12. pp. 4–13.
23. Babyr N. V., Korolev A. I., Neupokoeva T. V. Enhancement of powered cleaning equipment with the view of mining and geological conditions. IOP Conf. Series: Earth and Environmental Science. 2018. DOI: 10.1088/1755-1315/194/3/032004
24. Novak P., Babjak J. Roof support control in longwall technology. 4^th Coal Operators Conference, University of Wollongong, The Australasian Institute of Mining and Metallurgy & Mine Managers Association of Australia. 2014. pp. 34–41.
25. Klishin V. I. Adaptation of mechanized supports to the conditions of dynamic loading. Novosibirsk : Nauka, 2002. 199 p.
26. Buevich V. V., Gabov V. V., Zadkov D. A., Vasileva P. A. Adaptation of the mechanized roof support to changeable rock pressure. Eurasian Mining. 2015. No. 2. pp. 11–14. DOI: 10.17580/em.2015.02.03
27. Szurgacz D., Brodny J. Adapting the Powered Roof Support to Diverse Mining and Geological Conditions. Energies. 2020. No. 13(2), p. 405.
28. Gabov V. V., Zadkov D. A., Stebnev A. V. Evaluation of structure and variables within performance rating of hydraulically powered roof sup-port legs with smooth roof control. Eurasian mining. 2016. No. 2. pp. 37–40. DOI: 10.17580/em.2016.02.09
29. Stebnev A. V., Buevich V. V. Improvement of Performance Indicators of Hydraulic Drive of Props of Powered Support Units of Heading Complexes. Journal of Mining Institute. 2017. Vol. 227. pp. 576–581.
30. Szurgacz D., Brodny J. Analysis of the Influence of Dynamic Load on the Work Parameters of a Powered Roof Support’s Hydraulic Leg. Sustainability. 2019. Vol. 11(9). DOI: 10.3390/su11092570
31. Buyalich G. D., Buyalich K. G., Umrikhina V. Yu. Study of Falling Roof Vibrations in a Production Face at Roof Support Resistance in the Form of Concentrated Force. IOP Conference Series: Materials Science and Engineering. 2016. Vol. 142(1). DOI: 10.1088/1757-899X/142/1/012120
32. Guo W. B., Wang H. S., Dong G. W., Li L., Huang Y. G. A Case Study of Effective Support Working Resistance and Roof Support Technology in Thick Seam Fully-Mechanized Face Mining with Hard Roof Conditions. Sustainability. 2017. Vol. 9(6). DOI: 10.3390/su9060935
33. Stoinski K., Mika M. Dynamics of Hydraulic Leg of Powered Longwall Support. Journal of Mining Science. 2003. Vol. 39, No 1. pp. 72–77.
34. Liang Y., Li L., Li. X., Wang K., Chen J. et al. Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining. Shock and Vibration. 2019. DOI: 10.1155/2019/6519213
35. Buyalich, G.; Buyalich, K.; Byakov, M. Factors Determining the Size of Sealing Clearance in Hydraulic Legs of Powered Supports. E3S WEB of Conferences. 2017. Vol. 21. 03018. DOI: 10.1051/e3sconf/20172103018