Abstract
The excessive concentration of dust in fully-mechanized excavation face (FEF) poses a serious risk to the health and safety of workers. This paper proposes a novel dual swirling air curtain (DSAC) dust-control system and conducts similar experiments to evaluate its effectiveness. Firstly, the theory of annular swirling jet and the dust-control mechanism of DSAC are elaborated upon. The subsequent section presents a comprehensive description of the proposed DSAC, outlining its design and the theoretical computations involved. Thereafter, the formation and attenuation of the air curtain, as well as the dust diffusion patterns with and without the DSAC system, are investigated using a similar experimental platform. The results showed that the DSAC can produce a clockwise rotating swirling air curtain. Furthermore, the utilization of the DSAC can effectively mitigate dust concentration on the experimental platform and suppress dust diffusion.
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