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

Table 1

Macroscopic characteristic parameters of different nozzles and mean value of the microdroplet size.

Nozzles number	Macroscopic characteristics parameters		Spray droplet size
	Atomization angle (°)	Effective range (m)	D0.1/μm	D0.5/μm	D0.9/μm	D32/μm	D43/μm
1#	75	3.87	27.44	57.18	117.30	48.32	68.23
2#	88	3.65	21.13	48.36	97.31	39.40	63.64
3#	69	4.73	30.01	69.34	133.27	52.94	80.59
4#	73	4.36	38.48	87.46	155.81	67.94	99.42
5#	94	3.60	18.93	46.06	86.26	36.81	54.88
6#	80	4.15	30.61	71.60	134.75	63.48	85.16