Underground mining of semi-steep and steep seams is connected with high labor costs and low productivity. Furthermore, this process is difficult and requires continuous presence of personnel in the face area to accomplish complex activities and ground control, which is by all means hazardous and has aggravating influence on production safety. Experience accumulation facilitated improvement in coal seam mining. In pitch coal seams of small and medium thickness, longwall systems enjoyed wide application, which greatly reduced loss of coal as compared with room-and-pillar method. In gently dipping and pitch coal, longwalling and room-and-pillar mining were combined. Variants with hydraulic transport of backfill and coal, hydraulic breaking, etc. were also used. As science and technology has advanced in the 21st century, new modern, high-production mechanized longwall mining equipment has been developed for flat coal seams, which provides coal extraction without considerable loss. To date, persistent improvement of coal mining technology and equipment (first of all, in terms of safety and reliability) is the first-order condition of successful development in the coal industry. This article, unlike the earlier publications dedicated to this topic, critically approaches the problem of steep coal seam mining. The authors realize advantages of overall mechanization of flat coal seam mining and attach importance to sharing their experience and technologies applied in the Prokopievsk–Kiselevsk coal field as this can be beneficial in production of valuable coal grades both in Russia and abroad, for example, in Vietnam.

For citation: Efimov V. I., Abramkin N. I., Stas P. P. Steep coal seam mining Gornyy informatsionno-analiticheskiy byulleten'. 2019;4:20-29. [In Russ]. DOI: 10.25018/0236-1493-2019-04-0-20-29.


Steep seams, thick seams, mining systems, process flow diagrams, coal-face work.

Issue number: 4
Year: 2019
ISBN: 0236-1493
UDK: 622.274(571.17)
DOI: 10.25018/0236-1493-2019-04-0-20-29
Authors: Efimov V. I., Abramkin N. I., Stas P. P.

About authors: V.I. Efimov (1), Doctor of Technical Sciences, Professor, e-mail:, N.I. Abramkin (1), Doctor of Technical Sciences, Professor, e-mail:, P.P. Stas, Engineer, Russia, Tula, Tula State University, e-mail:, Tula State University, 300012, Tula, Russia, 1) National University of Science and Technology «MISiS», 119049, Moscow, Russia. Corresponding author: V.I. Efimov, e-mail:


1. Efimov V. I., Korchagina T. V., Popov A. I., Muzafarov G. G. Experience working off of steep coal seam Prokopevsko-Kiselevskiy deposit. Ugol'. 2018, no 6 (1107), pp. 12—20. [In Russ].

2. Efimov V. I., Sukharev G. V. Analysis of steep pitching coal working in Prokopyevsk. Izvestiya Tul'skogo gosudarstvennogo universiteta. Nauki o Zemle. 2013, no 2, pp. 57—77. [In Russ].

3. Mel'nik V. V., Efimov V. I. Safe underground working of superimposed thick steep coal beds. Bezopasnost' truda v promyshlennosti. 2014, no 12, pp. 22—24. [In Russ].

4. Grebenkina S. S., Mel'nik V. V. Progressivnye tekhnologii podzemnoy otrabotki zapasov mestorozhdeniy poleznykh iskopaemykh s zakladkoy vyrabotannykh prostranstv [Advanced underground mining reserves of mineral deposits to bookmark negotiated spaces], Donetsk, VIK, 2013, 749 p.

5. Li Yang, Zhu Enguang, Zhang Kangning, Li Minghao, Wang Jiaxing, Li Chengkun Longwall mining under gateroads and gobs of abandoned small mine. International. Journal of Mining Science and Technology. 2017. Vol. 27. pp. 359—364.

6. Joze Kortnik Optimization of the high safety pillars for the underground excavation of natural stone blocks. Acta geotechnica Slovenica, 2009, Vol. 6, 1, pp. 34—48.

7. Singh Satyendra K., Agrawal Harshit, Singh Awanindra P., Rib stability. A way forward for safe coal extraction in India. International Journal of Mining Science and Technology. 2017. Vol. 27. pp. 1087—1091.

8. Hosseini A., Najafi M., Shojaatlhosseini S. A., Rafiee R. Determination of a suitable extraction equipment in mechanized longwall mining in steeply inclined coal seams using fuzzy analytical hierarchy method (Case study: Hamkar coal mine, Iran). Journal of Mining & Environment, 2017, Vol. 8, No 3, pp. 487—499.

9. Zubov V. P., V'et K. K. Practical experience on using mining systems of thickness and sloppiness coalseams under coal-basin Quang Ninh. Gornyy informatsionno-analiticheskiy byulleten’. 2015, no 2, pp. 10—14. [In Russ].

10. Kazanin O. I., Sidorenko A. A., Sementsov V. V. Geomechanical parameters determination of sublevel caving mining systems for thick steep. Gornyy informatsionno-analiticheskiy byulleten’. 2013, no 4, pp. 15—21. [In Russ].

11. Klishin V. I. Innovative technology and ways to ensure productivity and safety of underground coal mining. Gornyy informatsionno-analiticheskiy byulleten’. 2018, no S48, pp. 52—63. [In Russ].

12. Egoshin V. V., Kukharenko E. V. Sistemy razrabotki krutopadayushchikh plastov Kuzbassa [Kuzbass steep pitching coal working systems], Kemerovo, Kuzbasskiy politekhnicheskiy institut, 1991, 80 p.

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