Study on influencing factors of fine water mist inhibiting fire spread in roadway
In order to explore the influencing factors of fine water mist inhibiting the spread of mine tape fire,the fire dynamics simulator(FDS)was used to construct the geometric model of mine roadway fire spread.The control variable method was used to simulate the water mist inhibiting of roadway fire by setting different fire source powers,fog fluxes,nozzle installation distances and wind speeds.The characteristics of fire field temperature and heat release rate under different working conditions were observed,and the influence of dif-ferent factors on fire development was revealed.The results show that the fine water mist has a good inhibitory effect on the spread of mine fire,and the effect of fine water mist cooling can be better played by optimizing the design of various influencing parameters.Rea-sonable increase of wind speed,fog flux and spray effective range can effectively improve the fire extinguishing efficiency and reduce the temperature and heat release efficiency.The change of the initial power of the fire source also has a great influence on the fine water mist fire extinguishing.Under the same other conditions,when the initial power increases from 2 MW to 4 MW,the temperature drop rate decreases from 72.7％to 32.7％.
fine water mistfire spreadinfluence parametersnumerical simulationtemperature characteristics
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