Inverse Y-shaped ventilation method for coal mining working face

The invention relates to an inverse Y-shaped ventilation method for a coal mining working face. In the method, a transportation roadway is arranged on one side of the coal mining working face; a railway roadway and a return air roadway are sequentially arranged on the other side of the coal mining working face; coal pillars are positioned between the railway roadway and the return air roadway; contact roadways are formed at certain intervals; sealed partition walls are arranged among the contact roadways; before the working face is actually mined, the contact roadways near the working face are communicated so as to form a return air contact roadway; a beside-roadway wall body is built along the border of a gob, which is close to the back of the working face; a sealing wall is constructed at the position which is 1 to 2m away from the back of the return air contact roadway so as to seal a gob-side entry and the return air roadway; when the working face is actually mined, air flow passes through the railway roadway and the transportation roadway to enter the coal mining work face and returns to the return air roadway through the gob-side entry and the return air contact roadway; and the stroke of the air flow forms an inverse Y shape. The ventilation method is characterized by simple structure and stable air flow, solves the problem of gas accumulation at the upper corner of an actual mining working face and the problem that the god-side entry is difficult to maintain, and has obvious social and economic benefits.