Functional Part of the Outburst Hazard Forecast Subsystem of the Multifunctional Coal Mine Safety System


Annotation:

Substantiation of one of the promising options for the implementation of the functional part of the outburst hazard forecast subsystem of the multifunctional mine safety system is given. The functional part of the subsystem is defined as the analytical and experimental justification of the algorithm for solving the problem of continuous automated forecast of sudden coal and gas outburst for a specific mine face based on the control of the main outburst hazard factors. The main factors taken are as follows: rock pressure estimated by the spectral-acoustic method; in-situ gas pressure estimated by methane concentration at the working face measured by aero-gas control equipment; coal strength periodically measured by strength meter. Preparation of a sudden outburst is represented by two stages: the beginning of the development of cracks in the face space, as a result of which the block structure of coal is formed, and the beginning of extrusion into the working of the layer of coal from the mouth of the future outburst cavity. For each stage, the outburst hazard criteria are defined for two options of determining the outburst hazard index by the spectral-acoustic method: as the ratio of high-frequency and low-frequency components of the noise spectrum of the working mining equipment, and as the ratio of the current and critical values of the medians of the amplitude-frequency noise characteristics. The methodology for the experimental determination of the outburst hazard criterion for a specific mine working based on data obtained as a result of fulfilling the outburst hazard forecast by successively instrumental and spectral-acoustic methods is substantiated in the article. As an instrumental method, the method was selected according to the initial gas release rate and the yield of drill cuttings when drilling a control hole as the most reliable method for assessing the main factors of outburst hazard. The given justification of the functional part can be used for developing technical assignment for the manufacturing hazard outburst forecast subsystem combined with the aero-gas control subsystem of the multifunctional mine safety system.

References:
  1. The program on ensuring further improvement of the working conditions, increasing safety of mining operations, reducing accident rate and injuries in the coal industry, maintaining preparedness of mine rescue brigades, emergency and rescue units for 2017–2019 (approved by Minenergo of Russia, Mintrud of Russia, EMERCOM of Russia, Rosteсhnadzor, NP OOORUP of 12/20/2016). Available at: https://legalacts.ru/doc/programma-po-obespecheniiu-dalneishego-uluchshenija-uslovii-truda-povyshenija-bezopasnosti (accessed: February 10, 2020). (In Russ.).
  2. The development program of the coal industry of Russia for the period until 2035: draft. Available at: https://www.rosugol.ru/upload/pdf/PRUP-2035.pdf (accessed: February 10, 2020). (In Russ.).
  3. Safety rules in the coal mines: Federal rules and regulations in the field of industrial safety. Ser. 05. Iss. 40. Moscow: ZAO NTTs PB, 2020. 198 p. (In Russ.).
  4. Black D.J. Review of coal and gas outburst in Australian underground coal mines. International Journal of Mining Science and Technology. 2019. Vol. 29. Iss. 6. pp. 815–824.
  5. Chaojun F., Sheng L., Mingkun L., Wenzhang D., Zhenhua Y. Coal and gas outburst dynamic system. International Journal of Mining Science and Technology. 2017. Vol. 27. Iss. 1. pp. 49–55.
  6. Yu B.H., Su C.X., Wang D.M. Study of the features of outburst caused by rock cross-cut coal uncovering and the law of gas dilatation energy release. International Journal of Mining Science and Technology. 2015. Vol. 25. Iss. 3. pp. 453–458.
  7. Korol V.I., Skobenko A.V. Acoustic method for forecasting gas-dynamic phenomena in the coal mines. Dnepropetrovsk: Natsionalnyy gornyy universitet, 2013. 181 p. (In Russ.).
  8. Instructions for predicting dynamic phenomena and monitoring the rocks massif when mining coal deposits: Federal rules and regulations in the field of industrial safety. Ser. 05. Iss. 49. Moscow: ZAO NTTs PB, 2020. 148 p. (In Russ.).
  9. Babenko A.G. Theoretical justification and methodology for increasing the level of occupational safety in the coal mines based on a risk-based approach and multifunctional safety systems: thesis... Doctor of Technical Sciences. Ekaterinburg: UGGU, 2016. 259 p. (In Russ.).
  10. Prevention of gas-dynamic phenomena in the coal mines: collection of reports. Ser. 05. Iss. 2. Moscow: ZAO NTTs PB, 2017. 308 p. (In Russ.).
  11. Shadrin A.V. All-round Geophysical Forecast of Coal Seams Outburst Hazard. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2019. № 1. pp. 42–48. (In Russ.). DOI: 10.24000/0409-2961-2019-1-42-48
  12. Khristianovich S.A. About the outburst wave. Izv. AN SSSR OTN = News-bulletin of the Division of Technical Sciences of the USSR Academy of Sciences. 1953. № 12. pp. 1679–1688. (In Russ.).
  13. Khristianovich S.A. About the outburst wave. Izv. AN SSR OTN = News-bulletin of the Division of Technical Sciences of the USSR Academy of Sciences. 1953. № 12. pp. 1689–1699. (In Russ.).
  14. Shadrin A.V., Kontrimas A.A. Median of the Amplitude-Frequency Characteristic of Noise of Operating Mining Equipment as an Indicator of Outburst Hazard. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2019. № 12. pp. 37–45. (In Russ.). DOI: 10.24000/0409-2961-2019-12-37-45
  15. Shadrin A.V., Diyuk Yu.A. Determination of the Outburst Hazard Criteria for the Complex Spectral-Acoustic Method of Forecast. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2019. № 8. pp. 19–26. (In Russ.). DOI: 10.24000/0409-2961-2019-8-19-26
DOI: 10.24000/0409-2961-2020-6-72-78
Year: 2020
Issue num: June
Keywords : multifunctional safety and security system coal mine outburst hazard criterion main factors of outburst hazard outburst hazard forecast subsystem functional part forecast algorithm
Authors:
  • Shadrin A.V.
    Shadrin A.V.
    Dr. Sci. (Eng.), Lead Researcher, avsh-357@mail.ru Coal Institute FITs UUKh SO RAN, Kemerovo, Russia