To quickly assess the overpressure and disaster distance of wood dust explosion, the TNT equivalent method was used to predict the overpressure value of wood dust explosion. The explosion pressure maximum of wood dust was simulated using ANSYS/LS-DYNA. The experimental results show that when the initial pressure is 0 MPa and the dust concentration is 750 g/m3, the error between simulated values and experimental values is within 10%; When the initial pressure is 0.101 MPa and the dust concentration is 730 g/m3, the error between the calculated value and the experimental value is 2.44%, the error between the simulated value and the experimental value is within 7%, and the error between the simulated value and the calculated value is within 8%. It proves that the TNT equivalent method is applicable for predicting the overpressure of wood dust explosion with or without standard atmospheric pressure. Based on the TNT equivalent method, the distribution of dust explosion overpressure in buildings was estimated, and the thresholds for casualties and building damage were analyzed. The research conclusion provides a reference basis for disaster prevention and mitigation measures such as the safe distance determination of hazardous areas for wood dust explosion.
YuanZ, KhakzadN, KhanF,et al.Dust explosions:a threat to the process industries[J].Process Safety and Environmental Protection,2015,98:57-71.
[2]
AbbasiT, AbbasiS.A.Dust explosions—cases,causes,consequences,and control[J].Journal of Hazardous Materials,2007,140(1/2):7-44.
[3]
IarossiI, AmyotteP R, KhanF I,et al.Explosibility of polyamide and polyester fibers[J].Journal of Loss Prevention in the Process Industries,2013,26(6):1627-1633.
[4]
AmyotteP R.Some myths and realities about dust explosions[J].Process Safety and Environmental Protection,2014,92(4):292-299.
[5]
PangZ H, ZhuN F, CuiY Q,et al.Experimental investigation on explosion flame propagation of wood dust in a semi‑closed tube[J].Journal of Loss Prevention in the Process Industries,2020,63:104028.
YuZi, HuTao‑ping, GuoLu,et al.The kinetics theoretical simulation of explosion pressure with different wood dust concentrations[J].China Forest Products Industry,2019,46(5):7-11.
[8]
BuY J, YuanC M, AmyotteP R,et al.Ignition hazard of non‑metallic dust clouds exposed to hotspots versus electrical sparks[J].Journal of Hazardous Materials,2019,365:895-904.
[9]
LeeM C, KimY S, RieD H.Analysis of explosion characteristics of combustible wood dust in confined system using the thermal decomposition rate and mass loss rate[J].Applied Thermal Engineering,2016,109:432-439.
[10]
IslasA, FernándesA R, BetegónC,et al.Computational assessment of biomass dust explosions in the 20 L sphere[J].Process Safety and Environmental Protection,2022,165:791-814.
[11]
PrughR W.Quantitative evaluation of “bleve” hazards[J].Journal of Fire Protection Engineering,1991,3(1):9-24.
[12]
ChengR S, ChenW S, HaoH,et al.Dynamic response of road tunnel subjected to internal boiling liquid expansion vapour explosion (BLEVE)[J].Tunnelling and Underground Space Technology,2022,123:104363.
[13]
ZhouH, ZhengC, YueX S,et al.TNT equivalency method in confined space based on steel plate deformation[J].International Journal of Impact Engineering,2023,178:104587.
[14]
GuoY B, LiuC C, WangD G,et al.Numerical study and safety spacing of buried parallel gas pipelines:a study based on TNT equivalent method[J].International Journal of Pressure Vessels and Piping,2018,168:246-257.
[15]
GuoY B, HeL G, WangD G,et al.Numerical investigation of surface conduit parallel gas pipeline explosive based on the TNT equivalent weight method[J].Journal of Loss Prevention in the Process Industries,2016,44:360-368.
LouvarJ F.Chemical process safety theory and applications[M].Translated by Jiang Jun‑cheng.Beijing:Chemical Industry Press,2006:164.
[19]
WuC Q, HaoH.Modelling of simultaneous ground shock and airblast pressure on nearby structures from surface explosion[J].International Journal of Impact Engineering,2005,31(6):699-717.
State Bureau of Quality and Technical Supervision of the People’s Republic of China. Determination for maximum explosion pressure and maximum rate of pressure rise of dust cloud:GB/T 16426—1996 [S].Beijing:Standards Press of China,1997.
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China,Standardization Administration of the People’s Republic of China. Thermal analysis test methods for thermal stability of materials:GB/T 13464—2008 [S].Beijing:Standards Press of China,2008.
Ministry of Industry and Information of the People’ s Republic of China. Thermo gravimetric-differential thermal analyzer:JB/T 6856—2017 [S].Beijing:China Machine Press,2017.
[26]
ZhangB, FuP F, LiuY,et al.Investigation on the ignition,thermal acceleration and characteristic temperatures of coal char combustion[J].Applied Thermal Engineering,2017,113:1303-1312.
[27]
LabusM, LempartM.Studies of polish paleozoic shale rocks using FTIR and TG/DSC methods[J].Journal of Petroleum Science and Engineering,2018,161:311-318.
WangC Z, WangH X, ShankarK,et al.Dynamic failure behavior of steel wire mesh subjected to medium velocity impact:experiments and simulations[J].International Journal of Mechanical Sciences,2022,216:106991.
[30]
奥尔连科.爆炸物理学[M].孙承纬,译.北京:科学出版社,2011:592.
[31]
OPЛEHKOЛП.Explosive physics[M].Translated by Sun Cheng‑wei.Beijing:Science Press,2011:592.
[32]
吴艳青,刘彦,黄风雷,等.爆炸力学理论及应用[M].北京:北京理工大学出版社,2021:211.
[33]
WuYan‑qing, LiuYan, HuangFeng‑lei,et al.Theory and application of explosion mechanics[M].Beijing:Beijing Institute of Technology Press,2021:211.