Inverse Y-shaped ventilation method for coal mining working face

Abstract

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.

Description

technical field [0001] The invention relates to a coal mine working face ventilation technology, in particular to a reverse Y-shaped ventilation method for a coal mining working face. Background technique [0002] The ventilation system of the coal mining face is an important component of the mine ventilation system, and whether its design is reasonable or not directly affects the safe production and economic benefits of the entire mine. Especially in gas mines, the selection of reasonable ventilation methods can significantly reduce the gas concentration of the working face, and can effectively control the gas concentration of the return air tunnel, which is of great significance to ensure the safe and efficient production of the working face. In fact, due to the impact of mine pressure, the layout of the working face roadway and the selection of ventilation methods are not arbitrary. The U-shaped ventilation system is generally used in China. This ventilation method has si...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this method is that it is difficult to protect the road along the gob. The advance length of the mining face in large-scale advanced mines often reaches thousands of meters or even more than two thousand meters. The implementation of gob-side entry retaining has relatively large objective problems, for example, it cannot effectively solve the problem of large deformation of the surrounding rock of gob-side entry retaining, and a large amount of roadway expansion and repair work is required in the later stage of gob-side entry retention.

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