| Summary: | To test explosive characteristics of the oil and gas mixture in urban drainage pipeline, we select six groups of the mixtures with different proportions of gasoline, methane and water, use 20L explosive ball experimental device in testing explosion rules of the oil and gas mixtures with different concentrations, and give research on explosive characteristics of oil and gas mixture systematically. Moreover, we give discussions on explosive characteristics of the mixed gases with different contents of gasoline, effect of water on explosion suppression of oil and gas mixture, and influence of methane with different concentrations on the explosive characteristics of oil and gas mixture from the two aspects of explosion pressure and explosion pressure rate of the mixed gas. The results indicate that: during pure gasoline explosion, the explosion pressure shall reach to the peak firstly and then reduce gradually, and explosion pressure shall increase obviously and explosion pressure rising rate shall rise apparently along with rising of gasoline concentration; when gasoline concentration remains unchanged, explosion pressure shall drop and explosion pressure rising rate shall increase obviously along with increment of water humidity; following rising of methane concentration, explosion pressure of the mixed gas of gasoline and water show the trend of rising before damping.
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