SUBSTANTIATION OF SAFE UNDERGROUND MINING IN SERIES OF COAL SEAMS UNDER HYDRAULIC FILL

The problems of coal mining under water bodies, among which hydraulic fills at open pit coal mines take an exceptional position, are discussed. The article describes geological conditions of Blagodatny site of A.D. Ruban Mine, on the surface of which there is an open pit partly used for placement of alluvium. The hydraulic fill is characterized as a waterworks, near-surface geological structure of alluvium mass is discussed and potentially hazardous zones in undermined rock mass are detected with regard to origination of water inrushes in underground excavations in a series of coal seams. The safe mining depth is determined as function of the type of the water body–hydraulic fill, geomechanical analysis is performed to determine a “permeable fractured zone” (PFZ) and, thereupon, the depth of safe coal mining under the hydraulic fill is estimated. It is shown that underground mining in series of coal seams under hydraulic fill is safe if PFZ is validated and permitted by the appropriate geomechanical analysis.

Keywords

Underground coal mining, undermining, water body, movement, hydraulic fill, safe mining depth, permeable fractured zone.

Issue number: 8
Year: 2018
ISBN:
UDK: 622.272.5
DOI: 10.25018/0236-1493-2018-8-0-217-226
Authors: Kutepov Yu. I., Mironov A. S., Kutepov Yu. Yu., Sablin M. V., Borger E. B.

About authors: Kutepov Yu.I. (1), Doctor of Technical Sciences, Professor, Head of Laboratory, e-mail: koutepovy@mail.ru, Mironov A.S. (1), Candidate of Geological and Mineralogical Sciences, Leading Researcher, e-mail: mironov1940@mail.ru, Kutepov Yu.Yu. (1), Graduate Student, Engineer, e-mail: KutepovYY@ya.ru, Sablin M.V. (2), Chief Engineer, e-mail: SablinMV@suek.ru, Borger E.B. (2), Chief Surveyor, e-mail: BorgerEB@suek.ru, 1) Saint Petersburg Mining University, 199106, Saint-Petersburg, Russia, 2) JSC «SUEK-Kuzbass», Mine Administration named after Ruban, 652507, Leninsk-Kuznetsk, Kemerovo region, Russia.

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