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目前,在地下工程的锚喷支护中,混凝土喷射机已被大量应用,生产量比以往有明显的增加。但由于现今大量使用的转子式喷射机只能输送水灰比为0.28～0.30以下的拌合料,喷头处的粉尘很大,在无通风状态下一般可达100mg/m~3以上,在喷射机附近,若
At present, in the underground bolting and bolting engineering, concrete jet has been a large number of applications, production increased significantly than in the past. However, due to the large amount of rotor-type jetting machines used today, only the mixture with a water-cement ratio of 0.28-0.30 can be conveyed. The dust at the jetting nozzles is very large, and generally can reach 100mg / m 3 or more under non-ventilated conditions. Near the machine, if