COMBINE FOR SELECTIVE CONCAVITY OF HEAVY POTASSIC LAYER WITH ROCK INTERLAYER Russian patent published in 2009 - IPC E21C27/02 E21C25/06 E21C31/04 

FIELD: mining.

SUBSTANCE: invention relates to minerals industry, particularly to treating combines for selective concavity of heavy, predominately potassic layers with rock interlayer. Combine for selective concavity of heavy potassic layer with rock interlayer includes casing, on ends of which there are mounted with ability of rotation in vertical plane two handles, each of which is outfitted by integrated rive and screw, and additional cutting block. Additional cutting block contains handle with integrated drive and screw, and is rigidly fixed to casing of combine. Fixed on body basis of cutting block is pivotally connected to carrier and hydro- thruster climbing of handle, which is rigidly connected to slider, installed in guide groove of carrier with ability of displacement with handle to bottom for value not less than width of screw, diametre of which is not more than power of top layer. Additionally end main screws of combine are implemented with diametre of not less than half of power of more heavy layer of stratum.

EFFECT: effectiveness increase of selective concavity of heavy layer with rock interlayer independently from capacity of the latter.

2 dwg