Research and application of power loss monitoring and alarm system for backup local ventilation fan
In order to improve the reliability and stability of the local air supply system in the excavation face of Qishan Coal Mine,through analysis and research,the existing underground broadcasting system,safety moni-toring and control system,and self-developed backup local ventilation fan power loss monitoring and alarm controller have been used to form a backup local ventilation fan power loss monitoring and alarm system with Qishan characteristics.Its application effectively reduces or avoids accidents of dual shutdown of local ventila-tion fans in the excavation face,promoting further development of mine safety production.
NETL
NSTL
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