The fatalness on fire/explosion hazards for dangerous chemicals was analyzed from three aspects including flammable chemicals, ignition source and combustion-supporting materials.

For the fire accident in the flammable materials transportation,two-phase-coupled Eulerian-Lagrangian model and particle stochastic model are established,and a numerical simulation of fire accident of leakage of the truck filled with liquefied propane in tunnel is conducted based on the component mixture fraction model.