Abstract: :In view of the frequent occurrence, strong destructive power and difficult monitoring of coal mine geological disasters, the WSN based coal mine geological disaster monitoring system was proposed. The system used Zigbee module to build wireless sensor network, and MPU-9250 (nine axis motion sensing module), soil temperature and humidity sensor, rainfall sensor and other equipment, which could effectively monitor landslides, ground collapse, ground cracks and other disasters. Wireless network data could be transmitted to the system monitoring platform through NB-IOT gateway, which was convenient for remote real-time monitoring of coal mine area. The application showed that the system has the characteristics of high cost performance, low delay, easy expansion and high accuracy, which could play a greater role in the monitoring of geological disasters in coal mines.

Key words: geological disaster of coal mine, WSN, Zigbee, real time monitoring