Cross-district double-U-shaped ventilating system for high-gas working face and application method for cross-district double-U-shaped ventilating system

Abstract

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.

Description

technical field [0001] The invention relates to a layout method of a mining roadway in a high-gas working face, belongs to the technical field of ventilation of a high-gas working face, and in particular relates to a cross-section double U-shaped ventilation system of a high-gas working face and an application method thereof. Background technique [0002] At present, the ventilation of the working face is one of the many factors restricting the high production and high efficiency of high gas coal mines in my country. A better working face ventilation system can not only provide sufficient air supply but also ensure easy maintenance of the mining roadway and a high coal recovery rate in the mining area. In order to achieve the above requirements, many improvements have been made to the ventilation system of the high gas working face, including the following forms: [0003] The U+L ventilation system includes a U-shaped ventilation system and tail alleys at the same level wit...

AI Technical Summary

Problems solved by technology

However, this double U-shaped ventilation system has the following two disadvantages: First, due to the influence of the mining of the working face, the gas discharge tailway retained by the mining face is extremely difficult to maintain, not only the maintenance cost is high, but also Sometimes the roadway cannot be used for the next working face; secondly, the coal pillar width of the gas discharge tail roadway and the working face is generally 10-35m, and the width of the coal pillar in the roadway is relatively large, which reduces the coal recovery rate in the mining area and causes coal waste of resources

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