Ningmeimei Huajing Coal Mine opened the first underground 5G telephone.

"1 1 1806 working face, here is the operation department, and the communication signal is normal. Please continue to work and pay attention to safety. " On August 10, the first 5G telephone in Meihuajing Mine was opened at 1 1806 heading face, which realized the breakthrough from "0" to "1" and the real-time communication between underground and the ground, marking the official entry of Meihuajing Mine into "5G+ intelligent mine construction.

"Although this is a small step in the application of 5G technology, it is a big step in the development of smart mines in Meihuajing Mine." He Xueyuan, secretary of the Party branch of the Mine Information Center, said with emotion.

Digital transformation of coal enterprises is not a "multiple choice", but a "compulsory course" related to survival and long-term development. For a long time, the main equipment of underground communication is PHS, which has completely lagged behind the development of the market. Hard problems such as poor call stability, equipment shutdown and inability to transmit data have greatly affected the pace of mine modernization development, and the application of 5G has perfectly solved these problems. 5G underground experiments were carried out in 11/806 heading face, and1radio frequency convergence units and 4 radio remote unit were deployed.

Using the advantages of 5G, underground ground can communicate in real time, even live video, and solve underground problems and unsafe production hidden dangers anytime and anywhere. "In the past, there were problems and hidden dangers in the underground. I had to raise the well into written materials and notify the meeting. The whole process was delayed by one day. Now I have a 5G explosion-proof mobile phone. If I encounter hidden dangers, I can take photos with one click, upload them immediately and solve them immediately. " Zhang, secretary of the first party branch of the comprehensive excavation team, introduced. In plum blossom culture, there is an important idea that "do it at once and be responsible for it to the end". The "coincidence" between science and technology and culture makes plum blossom culture rise from theory to practice.

The popularization and use of 5G will play an important role in the development of mines, but we should also treat the problem rationally. At present, the price of micro-base stations in 5G base stations remains high, with high cost and short coverage distance. But the application of technology should not be an excuse for rising costs. How to incite big returns through small investment? The answer lies in the simplest and straightforward concept of "problem orientation". According to the actual situation, Meihuajing Mine took the lead in applying the 4G+UWB+WIFI6 fusion base station in Ning Mei Company, in which 4G is mainly used for communication and WIFI6 is responsible for data transmission. After application, the system has the advantages of simple installation, clear division of labor and advanced technology. Through the integration of ground 4G core network and 5G core network, the unified communication of 5G and 4G in mine can be realized.

Mashup method is more flexible in application. For the production working face with low time delay, high reliability and many requirements for data transmission access nodes, the 5G base station is applied, and for other places with small data volume and low data delay requirements, the solution is adopted by 4G+WIFI6. This way of "teaching students in accordance with their aptitude" has greatly reduced the cost of mine networking, successfully opened up the mine data transmission channel, provided a stable information transmission channel for the sustainable development of mines in the future, and realized the intelligent transformation with small investment and large income.

"In the next step, we will explore and implement underground application scenarios around the characteristics of 5G technology, focus on breaking through intelligent comprehensive excavation and AI video analysis technology, and gradually give play to the information supporting role of 5G in mine transformation and upgrading." Zhang said, deputy mine manager of Meihuajing Mine.

It is understood that the 5G communication system of Meihuajing Mine adopts SA architecture, which consists of 5G core network, ground 5G base station and underground 5G base station. The mining area independently deploys the 5G core network and builds an independent 5G private network to realize the complete isolation of independent private network resources. To put it simply, while ensuring the service quality of the private network, all information such as application data, terminal number and location in the mine does not leave the mining area, meeting the most stringent data isolation and security requirements.