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云南锡业公司所属第一矿第二分矿的革命职工试验成功坑内“水沟通风”,为矿山井下掘进作出了新贡献。“水沟通风”是利用一次成巷的大规格独头巷道掘进的水沟当作排风用的导风管(即水沟代替导风筒),使爆炸时产生的有害气体及岩尘通过局扇抽入水沟净化,从而达到通风目的。经在该矿两个重点工程施工中使用,证明“水沟通风”具有如下优点: (1)使用“水沟通风”,比原来用胶风袋及300毫米铁管通风,在同样功率情况下,风量增加2～3倍,放炮后20分钟,即可进入工作
The revolutionary workers of the second sub-mine of Yunnan Tin Industry Co., Ltd. successfully tested the “gutter ventilation” in the pit and made new contributions to the underground excavation. “Ditching ventilation” is to use the ditches led by a large-sized single-lane roadway into an alley as an air duct for ventilation (that is, a ditch instead of an air duct) to allow harmful gas and rock dust generated during the explosion to pass Bureau fans pumping into the ditch clean, so as to achieve the purpose of ventilation. After being used in construction of two key projects in the mine, it has been proved that the “gutter ventilation” has the following advantages: (1) “gutter ventilation” is used, which is more ventilated than the original use of plastic bags and 300 mm iron pipes, and under the same power conditions , Air volume increased 2 to 3 times, after shooting 20 minutes, you can enter the work