Abstract：In order to reduce the pollution resulting from the blasting dust in a simple and effective way, and improve the dust suppression efficiency of water stemming for the most open-pit mine bench, the blasting dust diffusion law and the optimal ratio between water-stemming and solid stemming were studied. According to the theory of gas-solid two-phase flow and explosion mechanics, and by using Fluent numerical simulation combined with field test, the real-time simulation of blasting dust pollution was realized. The analysis results show that in the impact movement stage and mushroom cloud formation stage, the blasting air rapidly expands, and a large amount of blasting dust spreads into the open air space. The dust slowly sinks, whose particle size is 60~100 μm, and the dust whose particle size under 40 μm sinks very difficultly and continues to stay in the air due to wind disturbance. The water-stemming and solid stemming ratio formula was attained, meeting the requirements of both blasting effect and the idea suppression efficiency.
葛少成,黄志辉,荆德吉,陈曦,韩方伟. 露天矿爆破扬尘规律及水炮泥配比优化[J]. 辽宁工程技术大学学报(自然科学版), 2017, 36(3): 225-231.
GE Shaocheng,HUANG Zhihui,JING Deji,CHEN Xi,HAN Fangwei. Blasting-dust diffusion rule and water stemming ratio
optimization for open-pit mine. Journal of LNTU.Natural Science, 2017, 36(3): 225-231.