地下金属矿山矿房直接降尘技术

根据地下金属矿山矿房爆破后出矿时粉尘浓度大、持续时间长的特点，通过分析现阶段喷雾降尘方法存在缺点和不足的原因，提出利用高压降尘喷枪将降尘水直接作用于产尘源，从粉尘产生的源头上降低爆破后和出矿时的粉尘浓度。根据这一思路，设计制作了适用于地下金属矿山的降尘喷枪，通过传粉尘浓度感器控制降尘喷枪的开启，使降尘过程实现自动化。目前该技术已经在会宝岭铁矿现场进行了应用，较常规水幕降尘方法，可将爆破后等待炮烟时间缩短60%以上，可降低出矿巷道内粉尘浓度75%以上，降低上水平回风巷道内粉尘浓度60%以上。

Direct Dust Fall Technology for Chamber in Underground Metal Mine

According to the characteristics of high concentration and long lasting of duct after blasting or at ore-drawing of chamber in underground metal mine，and through analyzing the reasons for the defect and deficiency of the existing dust suppression by spraying，it is proposed that high-pressure dust suppression spray is used to directly spray water on the dust，which can reduce the dust concentration after blasting or at ore-drawing from the beginning.According to this idea，the dust suppression spray is designed for underground metal mines.The dustfall spray can be controlled by the dust concentration sensor to realize automation of the dust removal process.At present，this technique has been applied in Huibaoling Iron Mine，and shortened 60% of time on fume after blasting，reduced dust concentration above 75% in mine roadway，and lowered the dust concentration above 60% in upper level of the air return roadway.