PROCESSING OF POTASSIC SEAMS BY COMBINED TECHNOLOGY Russian patent published in 2014 - IPC E21C41/20 

FIELD: mining.

SUBSTANCE: step-by-step mining of productive layers of potassic seams with advance breaking the rock salt, first shearer mining is executed in the chamber design contour over its entire length to combine it with vent drift. Blasting cutting of the entire rock salt is performed in the entire volume of cleanup chamber design contour from the walls of shearer mining drift. Cut rock salt if placed on soil of previous shearer mining. Excavation of mineral from productive layers of potassic seam is performed by heading machine. Machine drift in the chamber design contour is located subject to chamber width either at the chamber centre or on board of its design contour.

EFFECT: higher efficiency of seam working owing to complete cutting of diluting layer in chamber contour.

2 cl, 3 dwg