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1957年我区坑道掘进会采取各种降尘措施,据观察,在推行湿式凿岩后,比干打眼时的粉尘浓度(1023.9毫克/立方公尺)降低达90%,加入软化岩石的湿润剂(如肥皂、碱等),比湿式凿岩又降低了67%,水喷雾也比干打眼降低70%,通风比干打眼降低44.5%,干式扑尘罩比干打眼降低59%。现将这方面的经验总结如下。一、湿式凿岩湿式凿岩不仅能冲洗濡湿钻孔的粉尘,减少粉尘在空气中的飞扬,而且能减少钻头磨损提高了工程进度,如0132部队执行湿式凿岩,钻头磨损比干打眼减少一倍左右,解决了部分钻头不足的困难,
In 1957, various tunneling measures were adopted in the tunnel excavation in our district. It was observed that after the wet rock drilling, the dust concentration (1023.9 mg / m ^ 3) at the time of dry drilling was reduced by 90% and the softening rock wetting agent Such as soap, caustic, etc.), a 67% reduction over wet rock drilling, a 70% reduction in water spray over drilled holes, a 44.5% reduction in ventilation over drilled holes, and a 59% reduction over dry drills. The experience of this area is summarized as follows. First, the wet rock drilling rock drill wet wet drilling not only to reduce dust flying in the air, but also to reduce the wear and tear drill to improve the progress of the project, such as the implementation of wet rock drill 0132 drill bit wear than the dry eye by one Times or so, to solve some of the difficulties of bit shortage,