Hydrogen sulfide distribution law and foam control technology of fully-mechanized gateway driving face

In order to control the hydrogen sulfide danger from the mine fully-mechanized gateway driving face, based on the site measurement analysis on the hyd rogen sulfide distribution law of No.71507 fully-mechanized gateway driving face in Dongshan Mine, a new technical plan with the foam absorption liquid was provided t 0 control the hydrogen sulfide.The paper studied the hydrogen sulfide control mechanism with the foam, the foam generator device and layout method.The result showe d that, the foam mass fraction 0.4%，absorption liquid flow 40 L/min and absorption liquid mass fraction 0.8% were obtained to control the hydrogen sulfide emission fro m the coal cutting by the seam driving machine in the mine fully-mechanized gateway driving face.The average value of the hydrogen sulfide from the coal cutting was r educed from 73.1x10-6to 10.6x10-6, the hydrogen sulfide absorption efficiency reached to 85 .5% and the good control effect of the hydrogen sulfide danger was obtain ed.