Experimental study on the semi-water sealing and pre-watering combineddust removal technology in Kunyang phosphate mine

In order to control the blasting dust and blasting harmful gases, the experiments of blasting dust control with four schemes were carried out in Kunyang phosphate mine.The first one is the comparison experiment;the second is the pre-watering scheme;the third one is the semi-water seal scheme; the fourth one is the combined scheme semi-water sealing and pre-watering.Through field test, 50 meters away from blasting zone after initiating 4 seconds in 2 min closed, the average concentration of dust size relations are as follows:scheme one (0.51mg/m³)> scheme two (0.43 mg/m³)> scheme three (0.24 mg/m³)> scheme four (0.17 mg/m³).Considering the difficulty level and actual input of site construction operation, combined semi-water seal and pre-watering technology of blasting dust control is best suitable for the Kunyang phosphate mine to create a good working environment for the mine production, and it has good application value.