On the Improvement of Non-pillar Methods of Securing Reused Excavation Workings


The key problem of underground mining of mineral deposits is to ensure the stable condition of the rock mass that contains the mine workings when conducting second working and preparatory works. To do this, it is necessary to create conditions that dictate strict requirements for maintaining the working section of workings. Active and often uncontrolled displacement of rocks in the interface zones leads not only to changes, but also to a significant deterioration in the operational condition of the workings, reducing the efficiency and safety of production processes.
Known methods and means of securing workings have a limited scope of application due to the high cost, labor intensity of work or insufficient efficiency. 
Given the current state of the coal industry and the lack of financial support from the state, the main feasible ways to solve the problem of reducing production costs in the conditions of deep mines in the Eastern Donbass should include increasing the level of spatial concentration of work, as well as the use of less material-intensive and cheaper types of support for excavation workings.
To solve the issue of maintaining the development workings of the extraction area and the possibility of non-pillar coal seam mining, a method of securing is proposed. It involves the placement of a rigid cast strip in a transport working and a rigid reusable security structure (multiplier) at the interface between the second and development workings. The structure is installed behind the sections of the mechanized and individual lining or in combination with other security structures (wood chocks and organ timbering, bollards of reinforced concrete blocks), with or without them, but with a mandatory combination of a multiplier with individual support stands.

1. Linnik V.Yu. Methodological basis for forecasting underground mining of coal deposits considering the indicators of the raw material base: thesis... Doctor of Economic Sciences. Moscow, 2012. 385 p. (In Russ.). 2. State report «On the state and use of mineral resources of the Russian Federation in 2018». Moscow, 2019. pp. 59–75. (In Russ.). 3. Grinko N.K., Gapanovich L.N., Baturin O.B. Ensuring the load on the face of 2–3 million tons of coal per year at the mines of Russia. Ugol. = Russian Coal Journal. 1998. № 5. pp. 15–18. (In Russ.). 4. Korovkin Yu.A., Burakov V.A. Cheap coal and increased safety in the system of technological and structural adjustment of the mines. Ugol. = Russian Coal Journal. 1999. № 5. pp. 22–27. (In Russ.). 5. Ryzhkov Yu.A., Ignatov E.V. Comparative assessment of mining and geological conditions of the development, equipment and technology for underground coal mining in Russia and abroad. Vestnik KuzGTU = Bulletin of the Kuzbass State Technical University. 2006. № 1 (52). pp. 67–74. (In Russ.). 6. Long-term program for the development of coal industry in Russia for the period up to 2030. Moscow: ZAO «Rosinformugol», 2014. 23 p. (In Russ.). 7. Long-term program for the development of the coal industry in Russia for the period up to 2035: Decree of the Government of the Russian Federation of June 13, 2020 № 1582-р. Available at: http://publication.pravo.gov.ru/Document/View/0001202006180009 (accessed: June 1, 2020). (In Russ.). 8. Belodedov A.A. Motivation to technologies of the development of fine and average, horizontal and tilted coal layer with provision for quality gained mountain mass (on example of the mines east donbass). Gornyy informatsionno-analiticheskiy byulleten = Mining informational and analytical bulletin. 2016. № 7. pp. 144–158. (In Russ.). 9. Shestakov V.A., Akimov L.M., Belodedov A.A., Poznyak V.M., Kukhtin A.V. Efficiency of coal deposits development, taking into account the directions of use and stages of coal processing. Gornyy informatsionno-analiticheskiy byulleten = Mining informational and analytical bulletin. 2001. № 1. pp. 205–208. (In Russ.). 10. Kazanin O.I., Yutyaev E.P. Underground Coal Mining Technologies: Current Challenges and Prospects. Gornyy informatsionno-analiticheskiy byulleten = Mining informational and analytical bulletin. 2018. № S48. pp. 41–51. (In Russ.). 11. Melnik V.V., Agafonov V.V., Yakunchikov S.N. Design of multifunctional systems. Tez. Mezhdunar. nauch.-prakt. konf. «Podzemnaya ugledobycha XXI vek» (Thesis of the International scientific and practical conference «Underground coal mining of the Twenty-first century). Leninsk-Kuznetskiy, 2018. (In Russ.). 12. Annual coal production in Rostov region can grow by more than 1.5 times by 2030. Available at: https://tass.ru/ekonomika/8793521 (accessed: June 1, 2020). (In Russ.). 13. Bazhin N.P., Rayskiy V.V., Volkov Yu.V., Dobritsa D.I., Kardakov V.E., Kornilkov V.N. Securing the development workings without pillars. Moscow: Nedra, 1975. 294 p. (In Russ.). 14. Chernyak I.L., Yarunin S.A. Management of the state of the rock mass. Moscow: Nedra, 1995. 395 p. (In Russ.). 15. Yakobi O. Rock pressure management practice. Moscow: Nedra, 1987. 566 p. (In Russ.). 16. Liu X., Yang S. Three-dimensional numerical simulation of methane drainage by high-level drill holes in a lower protective coal seam with a «U» type fact. International Journal of Coal Sciences & Technology. 2014.  № 1 (4). pp. 434–440. 17. Bonsu J., van Dyk W., Franzidis J.-P. Petersen F., Isafiade A. A systemic study of mining accident causality: an analysis of 91 mining accidents from a platinum mine in South Africa. Journal of the Southern African Institute of Mining and Metallurgy. 2017. Vol. 117. pp. 59–66. 18. Charehdash G., Barzegar M. Numerical models currently being developed for use in mining industry. Mine planning and equipment selection: Proceeding of 22nd MPES Conference. Drezden: Springer, 2013. pp. 481–490. 19. Ben-Awuah E., Richter O., Elkington T., Pourrahimian Y. Strategic mining options optimization: Open pit mining, underground mining or both. International Journal of Mining Sciences and Technology. 2016. Vol. 26. Iss. 6. pp. 1065–1071. 20. Golik V., Komaschenko V., Morkun V., Khasheva Z. The effectiveness of combining the stages of ore fields development. Metallurgical and Mining Industry. 2015. Vol. 7. № 5. pp. 401–405. 21. Voloshin A.I., Ryabtsev O.V., Koval A.I. Determination of the rational width of the pillar between the transport highway and the mined long face. Ugol Ukrainy = Coal of Ukraine. 2011. № 8. pp. 11–13. (In Russ.). 22. Privalov A.A. Providing the front of second working during intensive non-pillar mining of the thin coal seams: abstract of the thesis... Doctor of Technical Sciences. Saint-Petersburg, 2003. 29 p. (In Russ.). 23. Rutkov K.I., Belikov V.V., Belikova N.V. Securing the reused development workings with pillars made of wood-concrete blocks. Ugol. = Russian Coal Journal. 2000. № 10. pp. 59–61. (In Russ.). 24. Ovcharenko G.V., Vasilev S.V., Cholak E.O. Mine tests of the technology of extracting thin steep seams using pneumatic support «Neva». Ugol = Russian Coal Journal. 1989. № 9. pp. 31–32. (In Russ.). 25. Magomet R.D. Ensuring the stability of the intermediate roadways, fixed with anchor support, in the area between the double faces: abstract of the thesis... Candidate of Technical Sciences. Saint-Petersburg, 1998. 22 p. (In Russ.). 26. Melnik V.V. Geomechanical basis for ensuring the stability of mine workings and the efficiency of coal mining technology. Moscow: Izd-vo TulGU, 2017. 127 p. (In Russ.). 27. Dzhigrin A.V. Justification of the parameters of anchorage of mine workings in various mining conditions of the coal mines. Moscow–Tula: TulGU, 2017. 109 p. (In Russ.). 28. Chernyshov A.V. Development of a method for securing excavation workings for the purpose of their reuse by rigid security structures of reusable use: thesis... Candidate of Technical Sciences. Moscow: IGD im. A.A. Skochinskogo, 1994. 146 p. (In Russ.). 29. Chernyshov A.V., Kuznetsov Yu.N. Development of the Way of Protection of Extraction Workings of Mobile High Rigidity Cut Walling. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2016. № 5. pp. 53–59. (In Russ.).
DOI: 10.24000/0409-2961-2020-10-16-23
Year: 2020
Issue num: October
Keywords : stress condition mining operations stability of mine workings security of the development workings security constructions non-pillar methods of security interfaces of workings