Mine Car connections that cannot fall off by themselves must be used. According to the provisions of Article 412 and 414 of the "Coal mine Safety Regulations", when the inclined shaft is transported, the connection between the Narrow Gauge Mine Car and the connection between Mining Cart and the wire rope must use the connection device that can not fall off by itself, and the tension test of 2 times the maximum dead load must be carried out at least once a year.
Mine car is a narrow gauge railway transport vehicle for conveying coal, ore and waste rock and other loose materials in the mine, and generally must be pulled by locomotive or winch.