Gas Drainage Technology for False Inclined Rear High Drainage Roadway with Strike High Level Gas Drainage Roadway

According to the abnormal gas emission occurred at the initial mining period of the coal mining face and the large gas emission problem of the neighbor seams in Sijjazhaung Mine,a false inclined rear high drainage roadway with the strike high level gas drainage roadway technology was applied to study the gas drainag e technology mechanism and the gas drainage effect.The results showed that the false inclined rear high drainage roadway could successfully solve the disproportion g as emission and frequently over limit problems occurred at the initial mining period of the coal mining face and the initial mining period could be reduced by nine days.T he strike high level gas drainage roadway after the falling "three zones" formed, the gas drainage pure value could be increased to 110.71 m3/min,the gas drainage rate could be reached to 88.35% and good gas drainage effect was obtained.