Approbation of the technology of hydraulic separation of the developed coal seams through wells from the surface to the field of the Kirov mine

The article presents some results of testing the complex technology of degassing of the developed Boldyrevsky coal seam at the Kirov mine. Degassing was carried out at excavation sites 24—63 and 24—64 and includes hydraulic fracturing of the reservoir through wells drilled from the surface; its hydraulic fracturing through wells drilled from preparatory workings, as well as typical reservoir degassing by rising and descending wells drilled from preparatory workings into the area of the degassed reservoir partially disintegrated by hydraulic fracturing. Special attention is paid to the technology of hydraulic separation through wells from the surface, which is used for the first time at the Kuzbass mines for the purpose of effective degassing preparation of the coal seams being developed for intensive and safe mining, the distinctive characteristic of which is the use of the well-known technology of advance degassing in the pre-degassing mode without a significant reserve of time for reservoir degassing to solve the current problems of restraining the productivity of coal mining by the gas factor. The mechanism of achieving the effect of reducing gas release from the developed coal seam into the treatment face by reducing the effective gas content due to the blocking of methane by the working fluid in the coal seam in its smallest pores and cracks is substantiated.The main modes of hydrodynamic impact on the formation through wells from the surface are identified and recommendations for improving the technology are given, the expediency of two-stage processing of the coal seam under development using the coal swelling effect is confirmed.

Keywords: the main modes of introduction of working fluid into the formation, complex degassing preparation of the coal seam, wells from the surface, hydraulic fracturing of the formation, the first exploratory work, characteristic features of the formation treatment, two-stage treatment, the effect of coal swelling, the main technological conclusions and recommendations.

For citation:

Slastunov S. V., Meshkov A. A., Sadov A. P., Khautiev A. M.-B., Komissarov I. A. Approbation of the technology of hydraulic separation of the developed coal seams through wells from the surface to the field of the Kirov mine. MIAB. Mining Inf. Anal. Bull. 2021;(10-1):101—111. [In Russ]. DOI: 10.25018/0236_1493_2021_101_0_101.

Acknowledgements:

About authors:

Slastunov S. V.¹, Professor, Dr. Sci. (Eng.), Professor of the Department of Safety and Ecology of Mining Production, e-mail: slastunovsv@mail.ru;
Meshkov A. A.², Cand. Sci. (Eng.), General Director;
Sadov A. P.², Cand. Sci. (Eng.), Director of the Department of Methane Degassing and Utilization, e-mail: sadovap@suek.ru;
Khautiev A. M.-B.², Cand. Sci. (Eng.), Engineer-Technologist of the Department of Methane Degassing and Utilization, e-mail: khautievam@suek.ru;
Komissarov I. A.², Deputy Chief Engineer of the Department of Methane Degassing and Utilization, e-mail: komissarovIA@suek.ru;
¹ Mining Institute of NUST MISIS, Moscow, Russia;
² SUEK-Kuzbass Joint-Stock Company, Leninsk-Kuznetsky, Russia.

 

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