The invention belongs to the field of mines, and relates to a cross-district double-U-shaped ventilating
system for a high-gas working face and an application method for the cross-district double-U-shaped ventilating
system. The working face is mainly served by an air inlet roadway, an air return roadway, an air inlet gas exhaust
tail roadway and an air return gas exhaust
tail roadway of the ventilating
system, and the air inlet roadway is connected with the air return roadway by the working face, so that an inner U-shaped ventilating system is formed; the air return gas exhaust
tail roadway is distanced from the outer side of the air return roadway by 5-20m, the air inlet gas exhaust tail roadway is distanced from the outer side of the air inlet roadway by 150-350m, and the two gas exhaust tail roadways form an outer U-shaped ventilating system by the aid of an auxiliary
cut hole. The double-U-shaped ventilating system and the application method have the advantages that the problem of gas accumulation at upper corners and a gob of an existing high-gas working face is solved, an excellent stress environment is provided for roadway driving and maintaining by a cross-district huge
coal-pillar entry protection process, the
coal recovery rate of each district is increased by means of reducing the width of each
coal pillar between the corresponding roadways, and social and
economic benefits are obvious.