A novel mine mobile communication system of blackout environment in the coal mine

To address the problems of mine mobile communication system existing poor anti-interference and anti-disaster ability, and easy to form a large number of signal strength blind spots or dead zones and other issues, the genesis mechanism of wireless communications blind zones in the mine tunnel is clarified based on the electromagnetic wave theory, and a novel mine mobile communication system without blind zones is developed.A dual-bus-shaped network structure for mine mobile communication system is proposed, and the antenna structure considering distributed antenna and leakage is presented.Also, the working principle of the system is clarified, and the working frequency design is proposed.The results demonstrate that the system have wide network coverage, as well as anti-failure and anti-interference ability, which can eliminate the blackout of mine wireless communications in the coal mine, and meet mine production scheduling, emergency communications and relief, as well as whole mine mobile communication requirements