Abstract: Zhangji mine is high-methane mine, and the effusive load of methane in Fully Mechanized Coal Mining Working Face is large, and methane source is mainly goaf methane. By optimizing drainage parameters, No. 1111 working face was taken as the field for methane drainage through high-position hole. The field experiments in No.1111 working face being carried out are found that the drainage performance are improved and higher concentration methane and pumping flux can be realized after the application of high-position hole drainage, which greatly increase the pumping rate, and offered better solution for the problem of methane overload in fully mechanized coal mining working face. The pumping parameters can be introduced to the other similar mines, which is beneficial to safety production for high methane mines.

Key words: High-position hole, Goaf, Application, Effect analysis