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金属矿与非金属矿对粉尘控制的日益重视,促使矿业局调查了工作面打钻用的三种湿式粉尘控制法的对比效果。以前企图用于式集尘器对工作面进行粉尘控制没有取得满意的结果,其最大的问题是不能连续有效地捕集工作面粉尘。 调查结果表明:(1)在石膏矿中,通过钻头注射泡沫全尘降尘率平均可达95％;(2)在盐矿中,通过钻头注入水雾全尘降尘率平均约为91％,呼吸性粉尘降尘率平均达93％;(3)在盐矿中,装在钻机臂上的外部水喷雾对全尘及呼吸性粉尘的降尘率均约达50％。 研究表明:(1)在粉尘发生地点,通过钻杆向产尘点注入少量泡沫和水是工作面钻孔用的很有效的控尘方法。(2)装在吊杆上的水喷雾对工作面钻孔中产生的粉尘控制效果很差。
The growing emphasis on dust control in both metallic and non-metallic mines prompted the mining authority to investigate the contrasting effects of three wet-dust control methods for face drilling. Previous attempts to use a dust collector to control the dust on the working face did not achieve satisfactory results. The biggest problem is that it can not continuously and effectively capture the dust on the working face. The survey results show that: (1) in gypsum mine, the average dusting rate of dust in the foam injected through the drill bit can reach 95% on average; (2) In the salt mine, the dust dustfall rate is about 91% (3) In salt mines, the external water spray mounted on the drilling rig arm has a dust-reducing rate of about 50% for all dusts and respirable dusts. The research shows that: (1) At the place of dust generation, a small amount of foam and water are injected into the dust-producing point through the drill pipe, which is an effective dust control method for drilling the working face. (2) Water spray mounted on the boom minimizes dust control in the face drilled holes.