Open AccessNumerical Simulation Study on the Laws of Smoke Backlayering of Fire in Level Roadway of Metal Mine
Author(s) -
Mengya Tian,
Gao L,
Beibei Liu,
Jianfeng Zhao
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/558/2/022030
Subject(s) - backflow , smoke , flue gas , wind speed , flue , environmental science , section (typography) , flow (mathematics) , range (aeronautics) , engineering , inlet , law , mining engineering , meteorology , waste management , computer science , aerospace engineering , mechanics , mechanical engineering , geography , political science , physics , operating system
In order to study the law of smoke backflow in the middle of a metal mine fire, the FDS fire simulation software was used and the actual mine was used as the research background to establish a model including the middle section and the ramp. Set 6 kinds of fire source power of 5MW, 10MW, 15MW, 20MW, 25MW and 30MW, 1m/s, 1.5m/s, 2m/s, 2.5m/s and 3m/s 5 kinds of mid-range wind speed and 5%, 10%, 15% and 18% slopes are used to study the development rule of flue gas counterflow under different conditions. The results of the study show that the reverse flow range of the smoke flow in the middle section of different fire source powers can reach 8~30m, and the wind speed in the middle section has a significant effect on the suppression of the reverse flow of the flue gas. At the time, the length of fire smoke counterflow gradually decreased.