Technology of injection isolation of coal mine workings
A.E. Majorov, D.P. Kulik, I.L. Abramov
Federal Research Center for Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation
Russian Mining Industry №S2 / 2023 р. 47-52
Abstract: The basic composition of technological suspension (TS) for injection grouting of the edge part of the coal seam has been developed. The investigated water-solid TS actively show structural characteristics at different velocities of flat flow in the fracture. An increase in the TS concentration and introduction of ash-slag into the composition provides nonlinear growth of dynamic (ultimate) shear stress τ0 and is accompanied by a jump of its value in the range of water-solid ratio from 0.35 to 0.4. The schemes of grouting operations for different categories of coal seams stability have been developed, which differ in the application of spray-insulating coating, collector connection scheme and the evacuation system for the injection boreholes. Monitoring of the operating parameters with current operational assessment of the massif fracturing degree allows to control the flow movement and the TS injection pressure, reducing the solution losses while improving the quality of injection isolation.
Keywords: coal seam, grouting, injection isolation, vacuuming, technological suspension, filtration, grouting radius
Acknowledgments: The work was performed within the framework of the state assignment of the Federal Research Center of Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Project FWEZ-2021-0002 'Development of efficient technologies of coal mining by robotic mining complexes operating without permanent presence of personnel in mining zones, design of control systems and methods to assess their technical condition and operating life as well as justification of the mineral resource base reproduction' (Reg. No. АААА-А21-121012290021-1).
For citation: Majorov A.E., Kulik D.P., Abramov I.L. Technology of injection isolation of coal mine workings. Russian Mining Industry. 2023;(S2):47–52. https://doi.org/10.30686/1609-9192-2023-S2-47-52
Article info
Received: 13.07.2023
Revised: 14.08.2023
Accepted: 15.08.2023
Information about the authors
Alexander E. Majorov – Dr. Sci. (Eng.), Professor of the Russian Academy of Sciences, Chief Re-searcher, Institute of Coal of the Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; https://orcid.org/0000-0003-2093-775X; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Denis P. Kulik – Leading Engineer, Institute of Coal of the Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; https://orcid.org/0000-0002-8150-4344; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Igor L. Abramov – PhD. (Eng.), Associate Professor, Senior Researcher, Institute of Coal of the Federal Research Center of Coal and Coal Chemistry of Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; https://orcid.org/0000-0002-2161-3354; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Conflict of interest
The authors declare no conflict of interests. All the authors have read and approved the final version of this paper.
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