Аннотация
Different types of constructions of transshipment devices for combined schemes of automobile-conveyor transport are analyzed. A device of a new design was developed based on the identified shortcomings of known devices. The efficiency of the rock unloading device with through-passing trucks has been checked for the conditions of iron-ore mines in Kazakhstan. New device works because of rock weight force, which rotates bridges, that cover bunker for truck to move above it. Rotating bridges makes it possible to move rock down to bunker. After that, bridges close because of counterweight, which is a fence at the same time. The efficiency criteria of rock unloading device is volume reduce of mining capital works. Parameters were considered: width of the open-cast mine at the top and bottom, design depth of the mine, load capacity, turning radius and width of trucks, as well as the cost of extracting 1 m3 of rock. The dependence of reducing the costs of conducting mining capital works in deep open-cast mines during the construction of a transshipment point of combined automobile-conveyor transport with a through passage when unloading trucks from their carrying capacity have been established.