Effects of ratio of radial partial air volume to pressure air volume on air curtain dust control at fully mechanized working face
CHENG Weimin
WANG Hao
SUN Biao
MA Youying
Abstract：In order to clarify the effects of ratio of radial partial air volume to pressure air volume on air curtain dust control,a scaled physical model was developed for the 2-5082 fully mechanized working face in Sanjiaohe coal mine.The airflow migration and dust diffusion were numerically simulated using FLUENT for the pressure air volume Q was from 350 to 600 m3/min and the ratio of radial partial air volume of a wall-attached ventilation duct to pressure air volume B was from 50％ to 90％.The results show that the decrease of Q and the increase of B are both beneficial to the formation of a dust-control air curtain in the working face and the dust resistance capability is improved as well.For the 2-5082 fully mechanized working face and those working faces with similar conditions,an effective dust-control air curtain can be formed at the front section of the mining driver when Q is from 350 to 400 m3/min,B is from 80％ to 90％ and also Q is 450 m3/min,B is 90％.Among these parameters,the best dust-control effect can be achieved when Q is 350 m3/min,B is 90％.By field application,measuring data show that the simulation results are accurate.The dust with concentration higher than 50 mg/m3 is blocked within the space 10 m from working face and the environment at fully mechanized working area could be improved effectively.
Keywords：pressure air volumea wall-attached ventilation ductpartial air ratioair curtain dust control
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1014-1023 )