Influence of dust source location in fully-mechanized excavation face on location of negative pressure suction opening

doi:10.16265/j.cnki.issn1003-3033.2021.04.020

Abstract

Abstract: In order to study influence of suction opening location of integrated excavating machine on dust removal effect of roadway, a similar geometric model of roadway was established by using FLUENT software, and simulated researches on flow field and dust field of press-fit ventilation system and dust extraction system of integrated excavating machine were developed when dust was released from different dust sources.The results show that dust diffusion range of press-fit ventilation system of fully mechanized excavation face is 1-2 m away from head. Wind flow characteristics of suction location of integrated excavating machine at 1 m from head are most favorable for dust removal, and position of each dust source at this time dust in the roadway has been significantly improved. Dust extraction experiment of integrated excavating machine has also verified simulation results well. After adopting dust extraction technology of comprehensive excavator, overall dust concentration in the roadway is reduced when dust is released from various dust sources in the fully mechanized excavation face, and average dust removal efficiency is above 80%, up to 93%, which can well meet the dust reduction requirements of coal mines.

Key words: dust source location, suction opening, fully-mechanized excavation face, collection efficiency, dust distribution

CLC Number:

X936

ZHANG Yanjiao, XU Xiangyu, JIANG Wan , YAO Longlong. Influence of dust source location in fully-mechanized excavation face on location of negative pressure suction opening[J]. China Safety Science Journal, 2021, 31(4): 147-155.

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