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前言 由于煤矿采区的延深、集中和高效率大量出煤,采区瓦斯量有所增加。许多煤矿都在工作面上部采用通风机或局部通风机来排除瓦斯,并希望这些通风设备的功率要大。 但是,在使用通风机的地方,由于存在着浮游粉尘,可以看到,进入通风机内的粉尘具有高速飞散现象。这些粉尘在高速飞散的过程中带电,或者和井下设备相碰撞而产生大量静电荷。这些蓄积起来的静电荷一旦产生火花放电,就有可能引起甲烷气体着火。
Preface Due to the deepening of coal mining area, a large number of centralized and efficient coal, mining area gas has increased. Many mines use ventilators or partial fans in the upper part of the work surface to remove gas and hope the power of these ventilation equipment will be large. However, where the ventilator is used, because of the presence of the floating dust, it can be seen that dust entering the ventilator has high-speed scattering. These dusts are charged during high-speed flying or collide with the downhole equipment to generate a large amount of electrostatic charge. These accumulated electrostatic charge once spark discharge, it may cause methane gas fire.