Diffuse pollution characteristics of respirable dust in fully-mechanized mining face under various velocities based on CFD investigation

2018 ◽  
Vol 184 ◽  
pp. 239-250 ◽  
Author(s):  
Qi Zhang ◽  
Gang Zhou ◽  
Xinming Qian ◽  
Mengqi Yuan ◽  
Yanlong Sun ◽  
...  
Keyword(s):  
Diffuse Pollution ◽  
Respirable Dust ◽  
Pollution Characteristics ◽  
Mining Face

scholarly journals Experimental Investigation on Atomization and Dustfall Characteristics of Combined Nozzles for Shearer External Spray in Fully Mechanized Coal Mining Face

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Qian Wang ◽  
Ruixin Song ◽  
Junpeng Wang ◽  
Cuicui Xu ◽  
Gang Zhou ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Coal Mining ◽  
High Efficiency ◽  
Field Application ◽  
Respirable Dust ◽  
Optimal Parameters ◽  
Angle Change ◽  
Phase Doppler Interferometry ◽  
Mining Face

To explore the dustfall effect of combined nozzles used in a fully mechanized mining face, Phase Doppler Interferometry (PDI) system was used to test 6 types of high-efficiency atomizer under 8 MPa. A new nozzle group of nozzles 2#, 3#, and 5# is selected by atomization experiment. The atomization experiment and field application test of the preferred nozzle are performed. The experiment and field application results show that, with the spray pressure of 8 MPa, when the distance in the nozzle group is 200 mm and the angle change is 10 degrees, the atomization effect is the best. Under the optimal parameters, the average dustfall rates of the entire and respirable dust are 81.82% and 79.96%, respectively, which are 23.49% and 20.75% higher than those of the traditional shearer.

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