Overview

The Flexible Round Coal Mine Ventilation Duct is a core safety device designed specifically for the complex ventilation environments of underground coal mines. Like a resilient "breathing system," it efficiently and safely delivers fresh air from the surface to every working area of the mine, while simultaneously exhausting harmful gases and dust. It is an essential component for ensuring miner safety and safe mine production.

Compared to traditional rigid metal or fiberglass ducts, the flexible duct has become the preferred choice for modern coal mine ventilation systems due to its superior flexibility, durability, and cost-effectiveness. Made of a high-strength, flame-retardant, and antistatic composite material, its rounded, aerodynamic structure minimizes ventilation resistance and ensures unimpeded airflow. Technical Parameters

Diameter Range: Ø10 inches - Ø122 inches (customizable upon request)

Standard Section Lengths: 5m, 10m, 20m

Operating Pressure: 5000Pa - 8000Pa (positive pressure) / 3000Pa - 5000Pa (negative pressure)

Drag Coefficient: <0.02

Advantages and Features

Flame Retardant and Antistatic: The fabric undergoes a special treatment process to fully comply with coal mine safety standards (such as MSHA certification). It offers exceptional flame retardancy and effectively prevents static sparks generated by friction, fundamentally eliminating the risk of igniting combustible gases underground.

High Strength and Wear Resistance: Made of high-strength polyester or aramid fiber, the exterior is coated with a wear-resistant PVC or TPU coating, offering tear, abrasion, and corrosion resistance. It withstands the harsh underground environment and prevents localized ventilation failures due to air duct damage.

Applications

Localized pressure-in or exhaust ventilation of underground coal mine working faces. Connect and extend the ventilation system at mining working faces.

Useful in tunneling, underground culverts, and other working environments requiring forced ventilation.

Serves as an emergency ventilation system, quickly establishing ventilation pathways in the event of an emergency.