用凿岩机打眼时,总是产生大量粉尘。目前多采用湿式打眼抑尘,这是当水在大约4个大气压下通过钻杆1的中心孔,钻头锥形带3和射水孔4冲洗眼底(图a),但由于微细粉尘的弥散作用不易被水湿润,故仍处于悬浮状态,处于悬浮状态的粉尘由炮眼所漏之风(在钻头直径为40毫米,钻杆直径为22毫米时,炮眼漏风速度每秒钟可达0.11米)被吹出于孔 When drilling a hole with a rock drill, a lot of dust is always generated. At present, wet eyebolt is used to suppress dust, which is when the water passes through the central hole of the drill pipe 1 at about 4 atm. The drill cone belt 3 and the water hole 4 are used to wash the fundus (Figure a). However, due to the diffusing effect of the fine dust is not easy Soaked in water, it is still in suspension. The suspended dust is blown by the blasthole (at a drill diameter of 40 mm and a drill pipe diameter of 22 mm, the blast leaks at a rate of 0.11 m / sec) In the hole