Usage of rock structures in underground mining of hard-rock mineral deposits

The research aims to search out idle resources to enhance efficiency of underground mineral mining. The procedure of selecting a method of withdrawal of mined-out areas from operation in thin and average thickness ore body cutting in hard rock mass is ambiguous, which disables the economic benefit of the phenomenon at the preserved operational safety. The objective of the research is the theoretical and experimental validation of usability of the retained strength of fractured rocks in optimized withdrawal of mined-out areas from operation. The structural mechanics provisions are used to examine the phenomenon of the retained strength actualization in discrete rocks as a result of their wedging up with a view to optimizing ground control parameters in rock mass surrounding an ore body. The integrated studies have amended the concept of withdrawal of mined-out areas from operation in underground mining of structurally damaged deposits. The information on a specific strong ore body and the role of tectonics in its behavior during mining is given. The rock mass research data are generalized with delineation of geotechnical sites. The design procedure is presented for withdrawal of minedout areas from operation using the low-cost technologies of underground excavation isolation and cemented paste backfill; as against the known methods, the proposed procedure provides the quantitative indicators on a case-by-case basis for different conditions of ore localizations. The studies allow drawing conclusion on feasible actualization of the retained strength in fractured rocks given their wedging up in withdrawal of mined-out areas from operation, which, in proper conditions, can lead to an optimized solution for the test problem with integrated effect produced. The scientific novelty of this research consists in the circumstantiation of the known mechanics provisions relative to the stress–strain rock mass.

Golik V. I., Alekseev I. A. Usage of rock structures in underground mining of hard-rock mineral deposits. MIAB. Mining Inf. Anal. Bull. 2023;(5):57-67. [In Russ]. DOI: 10.25018/0236_1493_2023_5_0_57.

V.I. Golik, Dr. Sci. (Eng.), Professor, Moscow Polytechnic University, 107023, Moscow, Russia, e-mail: v.i.golik@mail.ru,
I.A. Alekseev, Cand. Sci. (Jurid.), Assistant Professor, Professor, Rector, North Caucasian Institute of Mining and Metallurgy (State Technological University), 362021, Vladikavkaz, Russia.

V.I. Golik, e-mail: v.i.golik@mail.ru.

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