Methodology for analyzing the reliability of geophysical methods that use portable instruments for predicting dynamic phenomena
A.V. Shadrin, M.S. Plaksin, D.N. Zastrelov, D.G. Luzyanin
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. 11-17
Abstract: The article presents a methodology for analyzing the reliability of geophysical methods that use portable instruments for predicting dynamic phenomena. The need for this methodology is explained by the lack of recommendations in regulatory documents regarding the selection of the most appropriate method to predict dynamic phenomena for specific conditions. This selection should be carried out by the relevant departments of coal-mining companies independently or with the help of scientific teams. Two portable devices for local prediction of rock bumps were chosen for the research, i.e. the Angel-M and the Ripas units, which implement the electromagnetic pulse method and a specific modification of the method based on parameters of artificial acoustic signals, respectively. The more reliable instrumental method based on the drilling fines yield was used as the reference method. It was assumed that the hazard level of the rock mass is the same when making predictions using the geophysical and instrumental methods, and can be quantitatively estimated as a ratio of the current value of the measured parameter to its threshold value. Reliability of the predictions made with portable devices was assessed by the correspondence of this ratio to the similar one calculated for the instrumental method. Initial testing of the proposed methodology at one of the Kuzbass coal mines showed insufficient reliability of predictions made using portable geophysical devices. This is probably explained by the following reasons: each of the devices does not control all of the key hazard factors of dynamic phenomena; there is no justification of the relationship between the hazard of the dynamic phenomena and the parameters controlled by the devices; when using the Ripas device, the geophone is pressed against the wall of the mine workings, so the fracturing within the near-wall rock mass significantly distorts the spectrum of the sounding acoustic signal.
Keywords: coal seam, dynamic phenomena, current hazard prediction, geophysical methods, portable instruments, forecast reliability
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-2021-0001 'Creation of multipurpose systems for monitoring and forecasting of gas-dynamic phenomena, control of the stress state, development of methods for their prevention and efficiency assessment during underground development of coal deposits' (Reg. No.АААА-А21-121012290020-4).
For citation: Shadrin A.V., Plaksin M.S., Zastrelov D.N., Luzyanin D.G. Methodology for analyzing the reliability of geophysical methods that use portable instruments for predicting dynamic phenomena. Russian Mining Industry. 2023;(S2):11–17. https://doi.org/10.30686/1609-9192-2023-S2-11-17
Article info
Received: 07.08.2023
Revised: 30.08.2023
Accepted: 01.09.2023
Information about the authors
Aleksandr V. Shadrin – Dr. Sci. (Eng.), Chief Research Associate, Coal Engineering Laboratory,, Federal Research Center for Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Maksim S. Plaksin – Cand, Sci. (Eng.), Senior Researcher, Laboratory of Coal Field Gas Dynamics, Federal Research Center for Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Denis N. Zastrelov – Cand. Sci. (Eng.), Senior Research Associate, Laboratory of Coalbed Methane Resources and Recovery Technologies, 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; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Dmitry G. Luzyanin – Lead Engineer, Laboratory of Coalbed Methane Resources and Recovery Technologies, Federal Research Center for Coal and Coal Chemistry of the Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russian Federation; 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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