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新奥法施工隧道掘进作业粉尘时间加权平均浓度为14.4mg/m ̄3_n。各工班中以炮后时间加权平均浓度最高(41.83mg/m ̄3_n),装碴和打眼分别为22.84mg/m ̄3_n和6.44mg/m ̄3_n。掘进作业全过程时间加权接尘量为12259.57mg/m ̄3_n.min)。其中装碴接尘量最高(7171.76mg/(m ̄3_n.min)占掘进全过程总接尘量的58.50%。各产尘工序产尘量构成比也以装碴最高(65.53%),打眼和爆破分别为18.78%和15.67%。
New Austrian law tunneling operation dust time weighted average concentration of 14.4mg / m ~ 3_n. In each class, the weighted average concentration of gunner time was the highest (41.83mg / m ~ 3_n), and the ballasting and drilling holes were 22.84mg / m ~ 3_n and 6.44mg / m ~ 3_n, respectively. Driving the whole process of weight-weighted dust was 12259.57mg / m ~ 3_n. min). Among them, the amount of ballast dust was the highest (7171.76mg / (m ~ 3_n.min)), accounting for 58.50% of the total amount of dust in the whole tunneling process. 53%), drilling and blasting were 18.78% and 15.67% respectively.