7 analyzed the influence of coal dust particle size on gas and coal dust explosion, and found that in mixed coal dust, when the particle size becomes smaller, the maximum explosion pressure and flame propagation speed both show an increasing trend.
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Numerical simulation study of the effect of coal dust on gas explosion overpressure.
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The sentences
Their study revealed an obvious trend: In the solid residue after coal dust explosion, the content of combustible components such as volatile and fixed carbon decreased significantly, while the content of ash increased significantly, which was affected by many factors such as coal dust concentration, coal dust particle size and ignition energy.