HOISTING PLANT FOR OPEN-CAST MINING (VERSIONS)

FIELD: mining industry. ^ SUBSTANCE: proposed hoisting plant for open-cast mining has inclined hoist passing from edge of mining extraction funnel hole on surface to foot of funnel hole and platform moving on said inclined hoist. Platform is moved by upper strand of wire rope and counter weight, by lower strand of wire rope. Hoisting machine is provided which operates on ground surface at upper end of hoist and is furnished with wire rope drum. According to first design version, either carrying frame of platform truck or counter weight are provided with one winding drum or several winding drums installed on common shaft, turns of corresponding wire rope being wound on each of drums. Winding drums can be driven motor means of chain. Platform is made for carrying truck loaded with dump material or excavated ore. According to second design version, hoisting plant is furnished additionally with hydraulic cylinder and re-setting mechanism acting onto said winding drum to fix length of corresponding wire rope. According to third design version, platform is provided with flooring on bogie to carry load truck, platform bogie being provided with fixing trunnions in its four corners engaging with flooring and orientated in direction of movement of said platform. ^ EFFECT: improved reliability and economy of plant at increased depth of mining. ^ 7 cl, 17 dwg