Abstract
In order to explore the propagation law of gas explosion in U type laneways, the propagation law of flame and shock wave in U type duct were experimentally and theoretically investigated. It is shown that the shock wave takes on the complicated stress state and the flame takes on complicated change rules in the U type duct. The propagation process of gas explosion in bend duct is the mutual action of explosion wave, flame and complicate flow, the destruction in bend surface is especially serious. In the mine exploitation and laneway design, the bend laneway should be avoided, especially continuous bend laneway.
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