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因为在炮烟中含有CO、NO、NO_2等有害气体,所以爆破后必须对工作面进行充分的通风,并确认巷道中有害气体的含量达到允许浓度以下时,才能开始作业。排出炮烟所必需的通风量应根据炮烟生成量、有毒气体浓度、允许浓度以及避炮时间而定。一、炮烟 (一)炮烟中有毒气体量爆破后所生成的有毒气体量,因炸药的种类、装药量、起爆方法、岩石性质及其周围条件的不同而异。见表1。表2是各种配
Because of the gun smoke contains CO, NO, NO2 and other harmful gases, blasting must be carried out on the face of adequate ventilation, and make sure the harmful gas content in the tunnel below the allowable concentration in order to start work. The amount of ventilation necessary to expel the gun should be based on the amount of gun smoke, the concentration of toxic gas, the allowable concentration, and the time to avoid it. I. Gunpowder (a) The amount of toxic gas generated after the amount of toxic gas exploded in the gun smoke varies depending on the type of explosive, the amount of charge, the initiation method, the nature of the rock and its surrounding conditions. See Table 1. Table 2 is a variety of distribution