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Statistical Modeling of Spontaneous Coal Combustion Due to the Effect of the Sun’s Rays

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Spontaneous combustion occurs in stockpiles in coal managements and causes interruptions in production and economical and environmental problems. This work was performed on an industrial-scale stockpile formed with +18-mm clean coal. The temperature changes of the stockpile exposed to sun’s rays were measured. Concurrently, the values of solar intensity, air temperature, air pressure, air humidity, wind speed, and wind direction affecting the stockpile were measured continuously. A statistical model to predict spontaneous combustion was developed by multi-nonlinear-regression analyses. The correlation coefficients were calculated around 0.95 levels. With this model, the effects of atmospheric conditions on spontaneous combustion of coal stockpiles can be predicted.
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Keywords: coal; solar intensity; spontaneous combustion; stockpile; sun’s rays

Document Type: Research Article

Affiliations: 1: Department of Mining Engineering, Selcuk University, Konya, Turkey 2: Department of Mining and Mineral Processing Engineering, Adana Science and Technology University, Adana, Turkey 3: Department of Mining Engineering, Queens University, Kingston, Ontario, Canada

Publication date: October 2, 2015

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