After a disaster occurs, rescue sites may quickly become filled with smoke, dust, hazardous gases, and stale air. Fires, tunnel accidents, mine disasters, earthquakes, and building collapses can all create difficult ventilation conditions. In enclosed or underground areas, poor air circulation can d

The mine ventilation system is a core infrastructure ensuring underground operational safety and production efficiency. The selection of ventilation ducts directly affects air circulation quality and dust discharge performance. In complex mining environments, where dust concentration is high, space

After a fire breaks out, smoke can spread rapidly and may become a major obstacle to firefighting and evacuation. Large amounts of hot smoke can significantly reduce visibility, affect personnel evacuation, hinder firefighting operations, and impact equipment operation. Therefore, establishing a rel

In chemical production facilities, spray-painting workshops, oil and gas processing areas, mining operations, powder-processing facilities, and certain industrial construction sites, combustible gases, vapors, or dust may mix with air and create potential fire or explosion hazards. These environment

In mines, tunnels, industrial workshops, underground projects, and other high-temperature working areas, rising ambient temperatures place higher demands on ventilation systems. Ordinary ventilation ducts may experience material aging, deformation, or damage when exposed to high temperatures, dust,

In underground tunnels, mines, subway construction sites, underground engineering projects, industrial facilities, and other humid working areas, high humidity creates additional challenges for ventilation systems. Conventional ventilation ducts exposed to high humidity, condensation, or occasional