Author 1:
Name & Surname: Sergeev S. V.
Company: Belgorod State National Research University — BelGU (Belgorod, Russia)
Work Position: Head of department, Professor
Scientific Degree: Doctor of Engineering Sciences
Contacts: sergeev@bsu.edu.ru

Author 2:
Name & Surname: Zaitsev D. A.
Company: Belgorod State National Research University — BelGU (Belgorod, Russia)
Work Position: Assistant
Scientific Degree: Candidate of Engineering Science

For complex hydrogeological and geotechnical conditions of rich iron ore mining at Yakovlevskoe deposit, Kursk Magnetic Anomaly, the authors have analyzed, validated, experimentally proved and present the in situ control procedure for stress–strain state SSS of backfill in unstable (loose) ore body in the course of top-down mining with slicing method. The paper describes the design of the integrated strain-gauge monitoring station for remote acquisition of current information in order to estimate stresses and strains in backfill in time and per phases of backfilling, including: string transducers for linear strains, string strain gauge, temperature sensor and measuring device for overlying rock pressure on support. Mechanism of SSS formation in backfill in the course of initial and lower slice mining is illustrated, the stress and strain control reliability is estimated in case of drivage towards backfill and when the backfill is undermined with lower level slicing. The research findings and the in situ experimental measurements show that the recommended procedure ensures efficient geomechanical control and enables reasoned technical and technological decision-making in safe deep level mining of rich iron ore in the area of Kursk Magnetic Anomaly and at other deposits with similar natural characteristics.

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3. Bazovye polozheniya reglamenta gidrogeomekhanicheskogo monitoringa Yakovlevskogo rudnika: otchet o nauchno-issledovatelskoy rabote (Basic points of regulation of hydrogeomechanical monitoring of Yakovlevsky mine: report about research effort). Operation manager: V. L. Trushko. Saint Petersburg : Saint Petersburg State Mining Institute (Technical University), 2005. 79 p.
4. Metodika provedeniya geomekhanicheskogo monitoringa v podzemnykh gornykh vyrabotkakh i na podrabatyvaemoy poverkhnosti Yakovlevskogo rudnika (Method of geomechanical monitoring in underground mine workings and on the worked up surface of Yakovlevsky mine). Operation manager: V. N. Gusev. Saint Petersburg : Saint Petersburg State Mining Institute (Technical University), 2007. 46 p.
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8. Sergeev S. V., Zaytsev D. A. Perspektivnye metody kontrolya deformirovaniya zakladochnogo massiva pri sloevoy sisteme razrabotki bogatykh zheleznykh rud (Prospect methods of control of deformation of filling mass with layer system of mining of rich iron ores). Izvestiya Tulskogo Gosudarstvennogo Universiteta. Nauki o Zemle = Proceedings of Tula State University. Earth Sciences. 2011. Iss. 1. pp. 365–371.