Study on explosion process of methane-coal dust mixture |
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Authors: | Guang-Dong Gong Chun-Hua Bai Qing-Ming Liu |
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Affiliation: | 1. China Ordnance Industrial Standardization Research Institute, Beijing, 100089, China 2. Beijing Institute of Technology, Beijing, 100081, China
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Abstract: | The experimental system of 10 m3 large-scale multiphase combustion explosion tank was used for research into the explosion development process under the ignition conditions of methane-coal dust-air mixture, and the overpressure development processes of the mixture at different distances were obtained. For the methane-coal dust-air mixture with an equivalence ratio of 1, the explosion pressure and pressure rise rate reached their maximum under a methane concentration of 8% and a coal dust concentration of 25 g/m3, while the maximum explosion pressure and pressure rise rate both occurred 0.5 m away from the ignition point under a methane concentration of between 4.5% and 8%, and a coal dust concentration of between 25 g/m3 and 100 g/m3. Moreover, the greater the explosion intensity of mixture, the closer the occurrence location of maximum overpressure was to the ignition source. |
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