Letter "K"

Kerf machine

KERF MACHINE is the mining machine, which is purposed for the creation of the kerf (slot) within the massif of the useful minerals (coal, petroleum shale, salt, coquina, tuff, and so on) with the purpose of the facilitation of its subsequent excavation.

Kerf

KERF is the artificial cavity within the coal or rock massif, which is created for the facilitation of its subsequent destruction during the excavation of the useful minerals, or during the conducting of the mine workings.