Hybrid-hoists for ultra deep-level mines

Hybrid-hoists have been proposed as a possible solution for ultra deep-level hoists. The hybrid hoist consists of a combination of a conventional hoist and a linear motor. Instead of the entire load being supported by the hoisting rope, the linear motor will take up most of the work during times when peak stresses would usually be placed on the rope. Consequently, only a short section of the linear motor primary has to be installed at the bottom of the shaft. Capital costs are thus greatly reduced when compared to the installation of a full linear motor system