With the development of trackless mining equipment and the large number of applications in the underground, in order to facilitate the transportation of ore and access to the underground by the trackless equipment, a new roadway-slope road has been created. Depending on the application, trackless ramps are divided into main ramps and auxiliary ramps. The main slopes are slopes that transport ore, which can be directly connected to the surface to form a slope. They can be used in conjunction with other major wells to form a joint development.
According to the layout of the transportation line, the ramp can be divided into three types: linear type, foldback type and spiral type. Straight ramps are mostly used for mines that are not buried in the car. The folding-back ramp has the widest application in production practice due to its flexible layout, convenient construction, good driver's line of sight, safe driving and convenient road maintenance. Due to the complicated construction conditions and poor driving safety conditions, the spiral slopes are less used.
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