What issues should be paid attention to during the construction of coal mine ventilation ducts

1. When replacing the coal mine ventilation duct fabric, it is not allowed to stop the local ventilation fan at will. If it is necessary to stop the machine, the team leader and driver of the excavation face should be contacted. The replacement can only be carried out after the work is stopped and personnel are evacuated. When there is a large amount of gas emission in the tunnel, the working face personnel must be evacuated to a safe location before replacing the coal mine ventilation duct cloth.
2. When installing the steel wire skeleton air duct, attention should be paid to loading and unloading with care, and radial compression and collision with sharp objects should be avoided to avoid deformation and damage.
3. The coal mine ventilation duct must be connected with a hard curved elbow at sharp turns.
4. During the construction process of coal mine air ducts, it is necessary to regularly inspect the coal mine air duct fabric. If there are any cracks, they should be repaired at any time to ensure no air leakage.
5. The distance between the end of the coal mine ventilation duct and the working face shall be implemented in accordance with the regulations of each mining bureau, but it is necessary to ensure that the working face has sufficient air volume. In other words, without sufficient air volume, ventilation cannot be achieved, so air volume is very important;
6. When replacing the coal mine ventilation duct fabric, it is not allowed to stop the local ventilation fan at will. If it is necessary to stop the machine, the team leader and driver of the excavation face should be contacted. The replacement can only be carried out after the work is stopped and personnel are evacuated. When there is a large amount of gas emission in the tunnel, the working face personnel must be evacuated to a safe location before replacing the coal mine ventilation duct cloth.
What are the connection methods for coal mine ventilation ducts
As is well known, coal mine or tunnel ventilation ducts can be divided into two types according to the direction of ventilation: positive pressure ventilation ducts and negative pressure ventilation ducts with telescopic skeleton ventilation ducts, but their connection methods are the same. Each coal mine air duct has a set of steel rings at both ends. The negative pressure air duct is evenly distributed with 40 steel rings on the cylinder body, while the positive pressure air duct does not have steel rings.
1. Quick connector: It is a connecting accessory between coal mine air ducts, which has a better effect than flipping;
2. Flipped Nesting: Each coal mine air duct will have a reserved air duct fabric of 15cm or more at both ends, and a flipped plate nesting will be used to connect the ducts.