1. Tao, X., Yan, Z., Yong, M.: Underground tunnel environment wireless monitoring system. Inf. Technol. (8), 46–49 (2017)
2. Liu, W., Li, Q.: Research on mine explosion-proof monitoring system based on ZigBee. Autom. Instrum. (4), 26–29 (2009)
3. Yun, H.: Research on mine personnel sign monitoring system based on ZigBee. Chang’an University, Xian (2011)
4. Feng, W.: LoRa Internet of Things technology and application. Telecom World (2), 91–92 (2017)
5. Guo, C.: Discuss the advantages and applications of short distance wireless communication technology. China New Telecommun. 19(5), 94 (2017)