Dust Concentration Changing Regularities and Dust Reduction Technology by Spray Negative Pressure in Fully Mechanized Mining Face

Table 8

The routine atomization parameters of 8 nozzles under the water pressure of 8 MPa.

Nozzle Parameter	1	2	3	4	5	6	7	8
Spray angle (°)	121.8	98.9	59.1	55.5	75.8	69.2	68.3	73.6
Effective range (m)	4.4	5.3	5.2	5.3	4.3	4.7	5.2	5.3
Flow (L/min)	7.66	8.50	7.66	9.12	6.67	6.86	8.75	7.07