Abstract: Abstract:The cable tunnel fire alarm and the fireproofing door technologies are already applied widely in industrial production. Aiming at larger difficulty in fire protection in underground cable tunnel, the system composition and the working principle of the cable tunnel automatic alarm and monitoring and automatic fireproofing door system were analyzed. The normally opened fireproofing door system, the multilayer cable tunnel temperature measuring and alarm system and the cable tunnel monitoring system were discussed. The cable tunnel fire automatic alarm and monitoring and automatic fireproofing door system of the thermal power plant was established preliminarily.

Key words: Keywords:cable tunnel, fire automatic alarm, automatic monitoring, fire partition