Assessment of stability of flow in a modified Mine Ventilation Network considering a presence of fire hazards

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Assessment of stability of flow in a modified
Mine Ventilation Network considering a presence
of fire hazards

• W. Dziurzynski, J. Krawczyk, J. Kruczkowski
• Strata Mechanics Research Institute
• of the Polish Academy of Sciences,
• Cracow, Poland

CRACOW
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Assessment of stability of flow in a modified
Mine Ventilation Network considering a presence
of fire hazards

• W. Dziurzynski, J. Krawczyk, J. Kruczkowski
• Strata Mechanics Research Institute
• of the Polish Academy of Sciences,
• Cracow, Poland

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PLANintroduction of a new heading forecast
of the effect on the flow distribution
experimental verificationcase study of fire
scenariosconclusion
Assessment of stability of flow in a modified
Mine Ventilation Network considering a presence
of fire hazards

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland

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Ventilation of two mines merged into one system
ISOMETRIC SCHEME a typical way of presentation
of ventilation networks in Poland

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland

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Introduction of a new heading

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland

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Introduction of a new headingresistance and
XNVP of a new working was estimated computer
model was modified forecast of flow was made
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Introduction of a new headingresistance and XNVP
of a new working was estimated computer model
was modified forecast of flow was made
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Introduction of a new headingafter actual
construction of the new working,results were
checked against new measurements
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MEASUREMENT OF THE FLOW QUANTITY IN THE NEW
WORKING
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MEASUREMENT OF THE FLOW QUANTITY IN THE NEW
WORKINGmultipoint, simulataneous velocity
measurement with a wireless network of computer
controlled sensors

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland

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case study of fire scenarios
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.
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case study of fire scenarios

• 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.

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case study of fire scenarios - scenario I

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland

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fire scenario I
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fire scenario I
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fire scenario I
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case study of fire scenarios- fire scenario II
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fire scenario II
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Conclusion
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.

• Strata Mechanics Research Institute of the Polish
  Academy of Sciences Krakow, Poland