Abstract: In view of the complicated environment of coal mine, the frequent occurrence of gas explosion accidents, and the difficulty of mine accident rescue, etc, a mine environment monitoring and personnel positioning system based on ZigBee is designed. The environmental parameters such as temperature, humidity and gas concentration are collected by the sensor, the CC2530 is used to build data transmission and personnel location network, the RSSI positioning technology and the three side positioning algorithm are combined to realize the real-time positioning of underground workers. According to the characteristics of the underground environment, the mean value filtering algorithm is used to modify the RSSI value, and the positioning accuracy is improved. The experimental results show that the system has the advantages of accurate monitoring of environmental parameters, smooth and reliable network communication and high positioning accuracy, and it can meet the needs of coal mine safety production management and mine accident rescue.

Key words: coal mine safety, environmental monitoring, personnel positioning, CC2530, RSSI positioning