METHOD FOR DEVELOPMENT OF FLAT DIPPING NARROW VEINS Russian patent published in 2020 - IPC E21C37/16 

FIELD: mining.

SUBSTANCE: invention relates to method of developing flat dipping narrow veins. Method of developing flat dipping narrow veins involves conducting preparatory and rifled openings, location of vein near soil of mining face, separation of enclosing rock and vein by successive blasting of rows of wells in enclosing rock and explosive stripping of vein, delivery of vein from cleaning chamber. In enclosing rock is drilled over the vein at angle of 45° relative to the borehole face surface, the enclosing rock is beaten by the explosion force into the cleaning chamber space. At the end of the roof collapse, the cleaning chamber is partially cleaned from the broken rock. Boreholes are drilled in a vein perpendicularly to a plane of a bottomhole in several rows with double density of boreholes in each of the below located rows. Explosive substance is charged with an upper borehole and every second one in each of the lower rows, with reduction of the amount of explosive in the rows from bottom to top. Vein mass is beaten with minimum movement along the cleaning chamber.

EFFECT: provision of qualitative development of narrow veins with minimum labor costs.

3 cl, 4 dwg