Analysis of the Regularities of Accumulation and Removal of the Exhaust Gases from the Сombustion-engined Vehicles in the Dead-end Chamber-like Mine Workings


The paper presents the results of the mathematical modeling of the conditions for ventilating extended blind dead end stope chamber-like mine workings of large cross-section, which are  formed by expanding the preparatory rifled mine working when loading and hauling machines with an internal combustion engine are operating in them. The experience of using CFD-modeling in solving problems of ventilation of such mine workings is analyzed. Numerical dependences of the change in the average concentration of exhaust gases at the workplace of the load-haul-dump machine operator on the operating time of equipment with an internal combustion engine in the stope area of the chamber were obtained. These dependencies allowed to determine the coefficient of efficiency of ventilation of dead-end stope chamber-like mine workings of large cross-section when operating equipment with an internal combustion engine in them.
It was found that the ventilation efficiency coefficient can be taken equal to one both in the case of an increase in the concentration, and in the case of its decrease. The conclusion is made about the same regularities in the processes of accumulation and removal of harmful impurities in the dead-end mine working. 
Using a parameterized model, expressions were obtained for determining maximum operating time of the machine with an internal combustion engine for unloading ore from the stope area without exceeding maximum permissible concentration of the exhaust gases. An expression is also presented for calculating the minimum ventilation time of the chamber after the vehicle leaves and before its re-entry into the chamber.  Made conclusions and obtained dependencies will allow to ensure safe working conditions for the miners in the extended dead-end stope chamber-like mine workings of large cross-section.

1. Safety rules when conducting mining operations and processing solid minerals: Federal norms and rules in industry safety. 3-e izd., pererab. Ser. 03. Iss. 78. Moscow: ZAO NTTs PB, 2021. 520 p. (In Russ.).
2. Kachurin N.M., Stas G.V., Mokhnachuk I.I., Pozdeev A.A. Aerogasdynamics of stoping areas of the mines and pits. Problemy bezopasnosti i effektivnosti osvoeniia georesursov v sovremennykh usloviiakh: sb. tr. conf. (Problems of safety and efficiency of georesources development in the current environment: Conference Proceedings). Perm, 2014. pp. 381–386. (In Russ.).
3. Kolesov E.V., Nakaryakov E.V. Selection of the turbulence model when simulating ventilation of the extended dead-end stope areas. Fundamentalnye i prikladnye voprosy gornykh nauk = Fundamental and applied issues of mining sciences. 2019. Vol. 6. № 3. pp. 82–89. (In Russ.).
4. Nakaryakov E.V., Grishin E.L. Investigation of the conditions for ventilation of the extended dead-end stope areas during operation of load-haul trucks with an internal combustion engine in them. Fundamentalnye i prikladnye voprosy gornykh nauk = Fundamental and applied issues of mining sciences. 2019. Vol. 6. № 3. pp. 105–111. (In Russ.).
5. Nakaryakov E.V. Analysis of the influence of geometric parameters of the cross-section of the stoping dead-end area on the efficiency of its ventilation. Gornoe ekho = Mining Echo. 2019. № 3 (76). pp. 76–79. (In Russ.). DOI: 10.7242/echo.2019.3.21
6. Voronin V.N. Fundamentals of the mine aero-gas dynamics. Moscow–Leningrad: Ugletekhizdat, 1951. 492 p. (In Russ.).
7. Feroze T., Phillips H.R. An initial investigation of room and pillar ventilation using CFD to Investigate the Effects of Last Through Road Velocity. Available at: (accessed: December 10, 2020).
8. Park J., Jo Y., Park G. Flow characteristics of fresh air discharged from a ventilation duct for mine ventilation. Journal of Mechanical Science and Technology. 2018. Vol. 32. Iss. 3. pp. 1187–1194.
9. Parra M.T., Villafruela J.M., Castro F., Mendez C. Numerical and experimental analysis of different ventilation systems in deep mines. Building and Environment. 2006. Vol. 41. Iss. 2. pp. 87–93.
10. Feroze T., Genc B. A CFD model to evaluate variables of the line brattice ventilation system in an empty heading. Journal of the Southern African Institute of Mining and Metallurgy. 2017. Vol. 117. № 2. pp. 97–108. DOI:10.17159/2411-9717/2017/v117n2a1
11. Hasheminasab F., Bagherpour R., Aminossadati S.M. Numerical simulation of methane distribution in development zones of underground coal mines equipped with auxiliary ventilation. Tunnelling and Underground Space Technology. 2019. Vol. 89. pp. 68–77.
12. Kozyrev S.A., Amosov P.V. Substantiation of the Minimum Distance from the Working Face of the Driven Working to the End of the Ventilation Pipes. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2012. № 10. pp. 79–84. (In Russ.).
13. Kozyrev S.A., Amosov P.V. Investigation of a blind excavation ventilation taking into account air leakage/inflow through the failure zone. Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal = News of the Higher Institutions. Mining Journal. 2018. № 8. pp. 125–134. (In Russ.). DOI: 10.21440/0536-1028-2018-8-125-134
14. Amosov P.V. Results of numerical simulation of the aerodynamics of blind mine excavations with a pipe-free ventilation method. Matematicheskie metody v tekhnike i tekhnologiyakh = Mathematical methods in engineering and technology. 2020. Vol. 2. pp. 114–117. (In Russ.).
15. Vengerov I.P. Thermophysics of the mines and pits. Mathematical models. Volume 1. Paradigm analyses. Donetsk: Nord-Press, 2008. 631 p. (In Russ.).
DOI: 10.24000/0409-2961-2021-5-41-47
Year: 2021
Issue num: May
  • Nakaryakov E.V.
    Nakaryakov E.V.
    Engineer, Mining Institute of the Ural Branch of the Russian Academy of Sciences, Perm, Russia
  • Semin M.A.
    Semin M.A.
    Cand. Sci. (Eng.), Academic Secretary Mining Institute UB RAS, Perm, Russia
  • Grishin E.L.
    Grishin E.L.
    Cand. Sci. (Eng.), Sector Leader Mining Institute of the Ural Branch of the Russian Academy of Sciences, Perm, Russia
  • Kolesov E.V.
    Kolesov E.V.
    Junior Research Associate of the Laboratory, GI UB RAS, Perm, Russia