What are the advantages and disadvantages of mine electric locomotives?

What are the advantages and disadvantages of mine electric locomotives as necessary equipment for mining today?

The overhead mine electric locomotives is the current input to the overhead line by the traction converter, enters the electric locomotive circuit and the electric locomotive through the receiver, and then returns to the transformer substation via the track. There are two kinds of DC voltages in China's underground overhead power grids: 250V and 550V, and two types of open-air power: 550V and 750V.

Advantages: The wire-type mine electric locomotives has a simple structure, low cost, and convenient maintenance. The locomotive has a large transportation capacity, high speed, high power efficiency, low transportation cost, and is widely used.

Disadvantages: There must be rectification and wiring facilities, which is not flexible enough; the wiring has a certain impact on the size of the roadway and the safety of pedestrians; sparks are easily generated between the pantograph and the wiring, and it is not allowed to be used in mines with severe gas; The investment is relatively large at the time, but in the long run, the total cost of using a line electric locomotive is much lower than that of a battery electric locomotive. Therefore, if the conditions of the mine permit, the main transportation of the mine should use overhead mine electric locomotives.