我矿为预防半煤岩掘进工作面干打眼的矽尘危害,降低工人矽肺发病率,于年初将原有“八一”型和沪产红旗牌电煤钻,改制成了侧式进水防尘电钻(见图1)。经试用效果显著,据防疫站测定,工作地点粉尘浓度已由干打眼时的110毫克/米3降低到9.5毫克/米3。这项改革不仅大大改善了劳动条件, In order to prevent the danger of silica dust from drilling the coal face of semi-coal rock face and reduce the incidence of silicosis, the mine changed the original “Bayi” type and Shanghai Hongqi electric coal drill into a side-type water defense at the beginning of the year Dust drill (see Figure 1). The trial results were significant, according to the Epidemic Prevention Station, the dust concentration at the worksite has been reduced from 110 mg / m3 when dried to 9.5 mg / m3. This reform has not only greatly improved working conditions,