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Two dimentional mathematical model of tunnel temperature field in condition of diffusion during seam smoldering steady according to heat transfer theory and comservation of mass, momentum and energy. Temperature character of tunnel in condition of diffusion during seam smoldering steady is simulated by COMSOL Multiphysics according to this model. Results show that temperature field in tunnel can be...
It is very important that to establish a rational and quantitative mathematical model for the safety management of coal enterprises. The model can help managers to develop practical safety management objectives. It can help people find out the safety production trends also. In this paper, time discrete state equation on the principle of Cybernetics was used to study coal mine safety production model...
In order to reduce the pollution and toxicity of current coal fire fighting materials used in underground mines, this paper proposes that the functional ionic liquid, a kind of green material, may be utilized to suppress the spontaneous fire based on coal's chemistry structures. According to the Fourier Transform Infrared (FTIR) spectroscopy experiment in low-temperature oxidation of coal, we found...
In this paper, theoretical analysis and practical of coal production were combined to study the mechanism of large gas explosion accident at coal face. The author uses coal spontaneous combustion theory, as well as rock pressure, gas flow field and gas explosion theory to study the cause of the large gas explosion with high incidence at coal face. Consequently, the cause of the accident is: when the...
The temperature field is one of the most important parameters of combustion safety in boiler. In this paper, acoustic pyrometry, a new diagnosis tool of combustion safety in boiler, is given. The principle of acoustic pyrometry is introduced. The unique benefits of diagnosis on combustion safety are described. Two key techniques of acoustic pyrometry, the measurement of time of flight (TOF) of sound...
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