Bulat A.F., Minieiev S.P., Makeiev S.Yu., Yanzhula O.S., Аgafonov А.V., Sachkо R.N., Bondar А.А. Control of technological processes and reduction of gas dynamic hazard on the basis of using the acoustic afteraction

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Parent Category: Geo-Technical Mechanics, 2021

Category: Geo-Technical Mechanics, 2021, № 157

Geoteh. meh. 2021, 157, 3-18

https://doi.org/10.15407/geotm2021.157.003

 

CONTROL OF TECHNOLOGICAL PROCESSES AND REDUCTION OF GAS DYNAMIC HAZARD ON THE BASIS OF USING THE ACOUSTIC AFTERACTION

¹Bulat A.F., ¹Minieiev S.P., ¹Makeiev S.Yu., ²Yanzhula O.S., ²Аgafonov А.V., ²Sachkо R.N., ²Bondar А.А.

¹Institute of Geotechnical Mechanics named by N. Poljakov of NAS of Ukraine, ²Private Joint Stock Company “Donetskstal – Metallurgical Plant”

UDC 622.831.323:550

Language: Ukrainian

Abstract. The objective of the work was to develop new methods for controlling technological processes during driving development headings and mining coal in stope faces. Accidents happened while performing of underground mining operations are often caused by the so-called “human factor”: miners do not always accurately follow the safety regulations, namely, the roadways are not supported in due time, the gas-drainage boreholes are drilled to the wrong depth, duration of the fluid injection at hydraulic loosening is cut, etc. In real conditions, it is difficult to control all the technological processes occurred underground. Therefore, the purpose of the study was to develop recommendations for controlling technological processes in the mines in order to reduce the risks of gas-dynamic phenomenon occurrence.
In this work, the authors present further development of the most rational known approach to the control of technological processes consisted in assessing of gas-dynamic hazard by the method of seismoacoustic aftereffect. The nature of changes in acoustic activity depending on the type of winning operations was analyzed. The clearer differentiated assessment of the stress-strain state of the coal seam face area was obtained. The study of the acoustic aftereffect during the mining of a coal seam by different technological methods made it possible to assess the technology of winning operations from the point of view of ensuring safe working conditions.
The block diagram was built, on the basis of which an algorithm of performing operational control of technological processes in development headings and stope faces was developed, including operations in prone-to-outburst seams. The basic requirements for the correction of existing software for the classification and recognition of technological processes by their acoustic aftereffect (trace) in the records of the predicting systems carried out during mining operations in the mine were formulated. These recommendations for the control of technological processes were proposed the Pokrovskoe Mine for implementation. The proposed recommendations improve accuracy of the forecasting of gas-dynamic hazards during mining operations, make it possible to control technological processes as well as simplify the investigation procedure for establish the causes of a critical situation in the case of an accident. The implementation of the recommendations will also make it possible to assess a gas-dynamic hazard during stoppages for repair and other auxiliary work, to predict geological disturbances ahead of the moving face, to determine the size of the unloading zone of the bottom area of the coal seam, and to assess the effectiveness of measures to prevent gas-dynamic phenomena.
Keywords: acoustic aftereffect, technological processes, gas-dynamic phenomenon, safety of mining operations.

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About the authors:

Bulat Anatolii Fedorovych, Academician of the National Academy of Science of Ukraine, Doctor of Technical Sciences (D. Sc), Professor, Director of the Institute, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Mineiev Serhii Pavlovych, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of Pressure Dynamics Control in Rocks, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Makeiev Serhii Yuriyovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Science of Ukraine, Dnipro, Ukraine,  This email address is being protected from spambots. You need JavaScript enabled to view it.

Yanzhula Oleksii Serhiyovych, Candidate of Technical Sciences (Ph.D.), Director for Technical Development and Investments, Private Joint Stock Company “Donetskstal – Metallurgical Plant”, Pokrovsk, Ukraine

Аgаfоnоv Oleksandr Vasiliovych, Doctor of Technical Sciences (D.Sc.), Head of Department, Private Joint Stock Company “Donetskstal – Metallurgical Plant”, Pokrovsk, Ukraine

Sachko Roman Mykolaiovych, Chief Engineer of Mine Administration “Pokrovske”, Private Joint Stock Company “Donetskstal – Metallurgical Plant”, Pokrovsk, Ukraine

Bondar Аndriy Anatoliiovych, Leading Specialist, Private Joint Stock Company “Donetskstal – Metallurgical Plant”, Pokrovsk, Ukraine

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