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Adaptable and energy-efficient powered roof support unit

The article addresses an acute problem connected with mitigation of impact exerted by a ‘hovering’ roof on the immediate roof behavior and on the coal cutting sustainability in the fully mechanized longwall mining technology. Using the theory of overburden pressure and features of force interaction between powered roof support units and roof rocks, the duty of MKYU.2SH-13/27 powered roof support unit in Ruban Mine of SUEK-Kuzbass is analyzed. It is proposed to use an energy-based principle of ground control in a fully mechanized longwall, which means adjustment of volume of power fluid by-pass from head ends of hydraulic props of powered support units to the pressure line of the hydraulic system of the fully mechanized longwall mining system during subsidence of roof rocks. The parameters of the powered support unit with a pulse-free control of the roof rock subsidence resistance are substantiated. The proposed structure of an adaptable powered roof support unit with telescopic footing and canopy consists of a bearing stage and a face stage which are independently and concordantly telescopically expandable. The support and guide beams available in this unit structure ensure immobile force contact between the bearing components of the unit and roof rocks when the unit is advanced, as well as enhanced prop and decreased resistance to movement of the powered roof support unit when it is equipped with sliding bearing supports.

Keywords: coal, mining, longwall, overburden pressure, longwall mining system, powered roof support unit, hydraulic prop, adaptability, energy efficiency.
For citation:

Zadkov D. A., Gabov V. V., Babyr N. V., Stebnev A. V., Teremetskaya V. A. Adaptable and energy-efficient powered roof support unit. MIAB. Mining Inf. Anal. Bull. 2022; (6):46-61. [In Russ]. DOI: 10.25018/0236_1493_2022_6_0_46.


The study was supported under the state contract in the sphere of scientific activities in 2021, RN SRW-2020-0014.

Issue number: 6
Year: 2022
Page number: 46-61
ISBN: 0236-1493
UDK: 622.23.05
DOI: 10.25018/0236_1493_2022_6_0_46
Article receipt date: 21.12.2021
Date of review receipt: 05.02.2022
Date of the editorial board′s decision on the article′s publishing: 10.05.2022
About authors:

V.V. Gabov1, Dr. Sci. (Eng.), Professor, e-mail:, ORCID ID: 0000-0002-6587-2446,
D.A. Zadkov1, Cand. Sci. (Eng.), Assistant Professor, e-mail:, ORCID ID: 0000-0002-1709-431X,
N.V. Babyr1, Cand. Sci. (Eng.), Assistant of Chair, e-mail:, ORCID ID: 0000-0002-5512-8517,
A.V. Stebnev, Cand. Sci. (Eng.), Chief Mechanic, JSC SUEK-Kuzbass, 652507, Leninsk-Kuznetskiy, Russia,
V.A. Teremetskaya1, Graduate Student,
1 Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia.


For contacts:

D.A. Zadkov, e-mail:


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