The construction of information infrastructure is an important component of the intelligent construction of coal mines. According to the Guidelines for Intelligent Construction of Coal Mines, 5G mobile communication networks have enormous advantages in the intelligent construction of coal mines. In this paper, the actual environment of the underground main transportation roadway of Lucun No.2 Coal Mine Branch of Fuxian Mining Development Co., Ltd. has been focused on, establishing a corresponding roadway model. The wireless transmission characteristics of signals has been analyzed and an electromagnetic propagation model inside the roadway has been established. Thus the electromagnetic propagation characteristics has been simulated. According to the characteristics of the main transportation roadway of the No. 2 mine in Lucun, an isosceles triangle node coverage model of the mine roadway base station is established, and a reasonable 5G base station deployment plan is designed to complete the layout of the base station in the underground roadway. Finally, the signal reception power, signal reception quality, and signal-to-noise ratio has been tested in the main transportation tunnel and the test results has been analyzed, indicating that the 5G base station deployment scheme basically meets the requirements.