REINFORCEMENT MATERIALS FOR DAMAGED ZONES IN COAL–ROCK MASS UNDER MINING

The common mining systems for steeply dipping coal seams, which are mostly used in Kuzbass mines, are discussed. The accumulated experience of coal mining under different conditions has allowed improvement of mining systems. Flat and pith coal seams of low and medium thickness are widely mined using longwalling which greatly reduces coal loss as compared with room-and-pillar methods. As science and technology advanced, in the 21st century, new modern and highly productive mechanized longwall systems were manufactured for flat coal mining, which enabled coal production without considerable loss in subsoil. Underground mining of steeply dipping coal seams is currently connected with high labor content and low productivity. Furthermore, steeply dipping coal mining features operational difficulties and continuous presence of personnel in the face area in order to perform complex process steps and for ground control, which is obviously hazardous and affects mining safety. To date, the persistent improvement of equipment (first of all, in terms of safety and reliability) and technology of coal mining is a necessary condition of efficiency of the coal industry. Despite considerable expenditures, restructuring of the coal industry has come to a generally positive result.

Keywords

Longwall, coal mine, chemical reinforcement, resin, efficiency improvement, coal–rock mass, damaged zone.

Issue number: 11
Year: 2018
ISBN:
UDK: 622.25.228.83.28
DOI: 10.25018/0236-1493-2018-11-0-39-45
Authors: Reshetnyak S. N.,Maksimenko Yu. M.

About authors: Reshetnyak S.N. (1), Candidate of Technical Sciences, Assistant Professor; Senior Researcher, e-mail: reshetniak@inbox.ru, Institute of Problems of Comprehensive Exploitation of Mineral Resources of Russian Academy of Sciences, 111020, Moscow, Russia, Maksimenko Yu.M. (1), Candidate of Technical Sciences, Assistant Professor, 1) National University of Science and Technology «MISiS», 119049, Moscow, Russia.

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