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W. Dziurzyński, J. Krawczyk, J. Kruczkowski Strata Mechanics Research Institute

Assessment of stability of flow in a modified Mine Ventilation Network considering a presence of fire hazards. W. Dziurzyński, J. Krawczyk, J. Kruczkowski Strata Mechanics Research Institute of the Polish Academy of Sciences, C ra c ow, Poland. CRACOW.

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W. Dziurzyński, J. Krawczyk, J. Kruczkowski Strata Mechanics Research Institute

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  1. Assessment of stability of flow in a modified Mine Ventilation Network considering a presence of fire hazards W. Dziurzyński, J. Krawczyk, J. Kruczkowski Strata Mechanics Research Institute of the Polish Academy of Sciences, Cracow, Poland CRACOW

  2. Assessment of stability of flow in a modified Mine Ventilation Network considering a presence of fire hazards W. Dziurzyński, J. Krawczyk, J. Kruczkowski Strata Mechanics Research Institute of the Polish Academy of Sciences, Cracow, Poland

  3. Assessment of stability of flow in a modified Mine Ventilation Network considering a presence of fire hazards PLAN:introduction of a new heading forecast of the effect on the flow distributionexperimental verificationcase study of fire scenariosconclusion Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland

  4. Ventilation of two mines merged into one system Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland ISOMETRIC SCHEME – a typical way ofpresentation of ventilation networks in Poland

  5. Introduction of a new heading Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland

  6. Introduction of a new headingresistance and XNVP of a new working was estimated computer model was modified forecast of flow was made

  7. Introduction of a new headingresistance and XNVP of a new working was estimated computer model was modified forecast of flow was made

  8. Introduction of a new headingafter actual construction of the new working,results were checked against new measurements

  9. MEASUREMENT OF THE FLOW QUANTITY IN THE NEW WORKING

  10. MEASUREMENT OF THE FLOW QUANTITY IN THE NEW WORKINGmultipoint, simulataneous velocity measurement with a wireless network of computer controlled sensors Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland

  11. VENTGRAPH software the unsteady State, solved by FIRE program. Program FIRE allows the simulations of unsteady distribution of air and gases in a mining excavation network after occurrence of an underground fire. case study of fire scenarios

  12. The fire can be simulated by: • calculating the flow rate of air and fire gases in each ventilation route; • identification of the current pressure of fans, • computing the propagation of gases and concentration levels of individual gases as a function of time and location; • calculation of temperature as a function of time and location; • calculation of natural ventilation pressure; • calculation of time and zone, where flow reversal may occur. case study of fire scenarios

  13. case study of fire scenarios - scenario I Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland

  14. fire scenario I

  15. fire scenario I

  16. fire scenario I

  17. case study of fire scenarios- fire scenario II

  18. fire scenario II

  19. In the example no. 1 of fire located at the entry to the haulage/transport dip-heading, a reversal of air flow has been observed. In the example no. 2 of fire in the haulage/transport dip-heading below the level of 200, a huge reduction of flow rate is observed. The examined fire cases cause transport of fire gases to the eastern part of the mine. To minimize the hazard that may be caused by fire in the dip-heading area of the mine, it must be prepared to redirect the flow in the haulage/transport dip-heading, as shown in the examples. Conclusion Strata Mechanics ResearchInstitute of the Polish Academy of SciencesKrakow, Poland

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