Substantiation of the feasibility of incorporating the methods and means of the forecast of outburst hazard as a subsystem for forecasting outburst hazard into a multifunctional safety system of the coal mine is given. This is due to the reduction in economic costs for increasing the reliability of the forecast, since in this case the forecast can be carried out considering the information received by other subsystems of the multifunctional safety system. As such an outburst monitoring subsystem integrated with a multifunctional safety system, the combination of the spectral-acoustic forecasting method with the mine air-gas control system is justified. It is shown that for the efficient operation, the outburst hazard forecasd subsystem must meet the following requirements: be based on the geophysical methods for monitoring the stress state of the bottomhole space, control the main outburst hazard factors, have an operational method for determining the outburst hazard criterion for the planned development of a reservoir section, have a scientifically substantiated «depth of sensitivity» hazard ahead of the face, be computerized and have a dedicated infrastructure unit to maintain the system. The latter should include geophysicists trained in the physics of wave processes in the anisotropic media. It is shown that the outburst hazard forecast subsystem should include functional and supporting parts. Functional part responsible for the information processing algorithm to determine the indicator and criterion of the outburst hazard should be based on the outburst preparation model, which considers the main outburst hazard factors: rock pressure, in-situ gas pressure, and the coal strength. As such, the model of two-stage preparation of an outburst is considered. In accordance with this model, at the first stage, a block structure of coal is formed in the bottomhole space of the working due to the growth of cracks under the influence of rock and gas pressure. On the second stage, the destruction of a relatively thin layer of coal at the mouth of the outburst cavity and the squeezing of the formed pieces of coal into the working. After that, the actual outburst begins.
2. Diyuk Yu.A., Kontrimas A.A. Multifunctional Safety Systems and Methods for the Current Forecast of Coal Seam Outburst Danger. Vestnik Nauchnogo tsentra po bezopasnosti rabot v ugolnoy promyshlennosti = Bulletin of Research Center for Safety in Coal Industry. 2020. № 1. pp. 36–43. (In Russ.).
3. 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. DOI: 10.1016/j.ijmst.2019.01.007
4. Chaojun F., Sheng L., Mingkun L., Wenzhang D., Yang Zh. Coal and gas outburst dynamic system. International Journal of Mining Science and Technology. 2017. Vol. 27. Iss. 1. pp. 49–55. DOI: 10.1016/j.ijmst.2016.11.003
5. 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.
6. 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.).
7. 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.).
8. 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
9. Shadrin A.V. Functional Part of the Outburst Hazard Forecast Subsystem of the Multifunctional Coal Mine Safety System. Bezopasnost truda v promyshlennosti = Occupational Safety in Industry. 2020. № 6. pp. 72–78. (In Russ.). DOI: 10.24000/0409-2961-2020-6-72-78
10. Shadrin A.V., Teleguz A.S. Coal Mine Multifunctional Safety Outburst Hazard Forecast Subsystem Structure. Vestnik Nauchnogo tsentra po bezopasnosti rabot v ugolnoy promyshlennosti= Bulletin of Research Center for Safety in Coal Industry. 2020. № 2. pp. 21–31. (In Russ.).
11. Petukhov I.M., Linkov A.M. The mechanism of unleashing and flow of coal, rock, and gas outburst. Osnovy teorii vnezapnykh vybrosov uglya, porody i gaza: sb. st. (Fundamentals of the theory of coal, rock, and gas outburst: collected papers). Moscow: Nedra, 1978. pp. 62–92. (In Russ.).
12. Petukhov I.M., Linkov A.M. Mechanics of rock bumps and outbursts. Moscow: Nedra, 1983. 280 p. (In Russ.).
13. Murashev V.I. Mechanism of unleashing coal and gas outburst in the mine workings. Osnovy teorii vnezapnykh vybrosov uglya, porody i gaza: sb. st. (Fundamentals of the theory of coal, rock, and gas outburst: collected papers). Moscow: Nedra, 1978. pp. 141–162. (In Russ.).
14. Khodot V.V. Sudden outburst of coal and gas. Moscow: Gosudarstvennoe nauchno-tekhnicheskoe izdatelstvo literatury po gornomu delu, 1961. 364 p. (In Russ.).
15. Fundamentals of the theory of coal, rock, and gas outburst: collected papers. Moscow: Nedra, 1978. 162 p. (In Russ.).
16. International symposium-cum-workshop on management and control of high gas emissions and outbursts in underground coal mines. Wollongong: National organising committee of the symposium, 1995. 620 p.
17. 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.).
18. Khristianovich S.A. About the outburst wave. Izvestiya Akademii nauk SSSR. Otdelenie tekhnicheskikh nauk = Bulletin of the USSR Academy of Sciences. Department of Engineering Sciences. 1953. № 12. pp. 1679–1688. (In Russ.).
19. Khristianovich S.A. About the outburst wave. Izvestiya Akademii nauk SSSR. Otdelenie tekhnicheskikh nauk = Bulletin of the USSR Academy of Sciences. Department of Engineering Sciences. 1953. № 12. pp. 1689–1699. (In Russ.).
20. Shadrin A., Diyuk Y. Geophysical criterion of pre-outburst coal outsqueezing from the face space into the working. International Journal of Mining Science and Technology. 2019. Vol. 29. Iss. 3. pp. 499–506. DOI: 10.1016/j.ijmst.2018.11.001
