Abstract
To study the flame retardant effect of ultrasonic atomized aerosol in different positions of goaf, a physical similarity simulation experiment platform is designed in this paper, and molecular dynamics simulation software is used to reveal the mechanism of aerosol-coal adsorption. After ultrasonic atomization, most of the aerosol particles of the composite inhibitor can reach the depth of the model. Compared with raw coal, coal samples at different positions are subject to different degrees of inhibition. The simulation results show that the increase of temperature will lead to a significant increase in the interfacial binding energy, radial concentration and diffusion coefficient of water-coal and inhibitor-coal systems. When the specific surface area increases, the particle size of the aerosol will gradually become smaller, and the molecules in the system will accelerate the movement, so that the system tends to be stable, which is helpful for the prevention and control of coal spontaneous combustion.
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