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对那些不能利用矿井总风压供风的巷道掘进头,要用局部独立通风。向独头巷道掘进头的供风量要足以把沼气和其它有毒有害气体稀释到允许浓度以下,并造成宜于作业的气候条件,还要保证有起码的风流速度等。 在波兰《弋洛吉采》矿,掘进№603平巷时的试验表明,长度在500米以下的独头巷的掘进头的通风没有困难,在密封风筒一端安设一台强力局扇即可。而向长度超过500米的巷道掘进头供风,技术上就颇为困难,尽管利用几台局扇,但因风筒太长,其中阻力仍然过大。在该矿在主要风筒的一端,又安接了一段带局扇的平行的辅助风筒(图1),解决了这一问题。
For those who can not use the total pressure of the mine wind tunneling head, use local independent ventilation. The amount of air supplied to the driving head of a single-headed tunnel is sufficient to dilute the biogas and other toxic and harmful gases below the allowable concentration and to create a suitable climatic condition for operation, with a minimum of airflow velocity. Tests conducted at the otogo mining in Poland on № 603 lathing show that it is not difficult to ventilate the driving head of a single-headed alley with a length of 500 m or less. One strong fan is installed at one end of the sealed duct can. However, it is technically difficult to supply wind to a roadheader with a length of more than 500 meters. Despite the use of several bureau fans, the drag is still too long and the drag is still too large. At the mine at the end of the main hairdryer, and then received a fan with a parallel auxiliary fan (Figure 1) to solve this problem.