Mine emergency communication system

Feasibility of using existing mine communication system as emergency communication system was analyzed. Leakage communication system, inductive communication system, multi-base station mobile communication system, broadcast communication system and rescue communication system cannot be used as emergency communication system. Mine wired dispatching communication system can be used as mine emergency communication system. Through-the-earth communication system can be used as emergency communication system, but the accidents can cause more than 100 meters of underground transmission antenna damage and affect underground communication to the ground. A wireless relay mine emergency communication system was put forward which adopts multi-stage wireless relay and the wireless transmission distance is not less than 10 km. Backup power supply should be provided after undereground power cut or an accident. Base stations, base station power, and base station cable should be set in an electromechanical chamber or protected. Antenna feeders are buried in laneway, and use an arc or streamline structure to flattened itself against the laneway wall or roadway roof. Antenna, base station and its power supply, antenna feeder, cable, etc. are designed with waterproof, high temperature and shock resistance. Base stations adopt redundant arrangement. Mine emergency communication system based on wireless and wired dual links was put forward which has the function of automatic routing for wired and wireless lines. The wired network structure is recommended to use a structure with strong anti-fault capability, such as star network structure, double tree network structure or tree network structure. Double-tree cables or optical cables should be installed in different roadways, or different cables or optical cables should be used. Between the base station and the ground dispatching room, there is no equipment that needs to be powered. Passive optical networks should be selected for optical cables with tree or double tree network structures.