First of all, in the underground mining operation area of the coal mine, the box-type substation can provide stable power for mining equipment, such as shearer, boring machine, etc. The power of these equipment is large, and the box-type substation can ensure its continuous and reliable work to ensure the smooth progress of mining work. Secondly, in the coal screening, coal washing and other processing links in the well, the power supply for various transport belts, screening equipment and washing equipment to ensure the efficient processing of coal. In addition, it can also provide power for key safety guarantee facilities such as ventilation system and drainage system of coal mine, ensure good ventilation and smooth drainage of underground mine, and maintain the safety environment of coal mine production.