Experimental study and application of dust reduction parameters for mine water curtain

In order to obtain the optimal technical parameters for dust reduction in roadways with water curtains, experimental models are designed for nozzle atomization and roadway water curtain dust reduction. The effects of different nozzle atomization characteristics and water curtains combined with different specifications of dust screens on ventilation resistance and dust reduction efficiency in roadways are analyzed. The results show that the optimal air-water flow rates for dry mist nozzles and air-water nozzles are 960 and 1 200. When the water flow rate is constant, the dust reduction effect of the water curtain of the dry mist nozzle is better than that of the air-water nozzle. The smaller the area of the water curtain mesh, the greater the ventilation resistance and the higher the dust reduction efficiency. The ventilation resistance of the water curtain increases linearly with the roadway wind speed, and the dust reduction efficiency first increases and then decreases with the wind speed. Taking into account three factors, water consumption, ventilation resistance, and dust reduction efficiency, the optimal solution is to use a dry mist nozzle and a 3 mm mesh water curtain. Through on-site verification, the research results can provide a basis for the selection of on-site water curtain parameters.