Technology Research Of Fire Accident Investigation In Mine Based On Material Evidence Analysis

Through theoretical analysis of the process and mechanism of different fuel, the proper fire combustion model and the fire spread model was determined. By analyzing the formation and characteristics of buoyant plume, which the author used the method of theoretical analysis and of numerical calculation, the author established the attenuation model under non-steady state heat-transfer conditions. By analyzing the causes of inverse plume phenomena near fire, the author concluded the type of physical parameters that influence the critical wind speed. With the method of quantitative analysis, combining full-sized tunnel fire accident simulation and numerical simulation, the analysis was approved and the theory of combustion and of spread was perfected. First step, the author analyzed the destruction mechanism of evidence in fire accident; second, the author determined the conductivity, metallographic structure and hardness of common material by simulation; third, combining the law of fire spread with established quantitative relationship between temperature and damage of evidence during fire accident, the author advanced a comprehensive analysis investigation technology, which supply technical support for the investigation of fire accident in coal mine.