METHOD TO EXPLODE ROCK MASSIFS OF VARIOUS STRENGTH Russian patent published in 2013 - IPC F42D3/04 

FIELD: mining.

SUBSTANCE: method includes drilling of vertical main and additional wells inside a contour in plan of solid inclusions in centres of squares formed by adjacent main wells, besides, selection of diametres of additional wells mm is made according to the ratio of strength properties of solid inclusions and deads on the basis of the ratio with account of the diametre of main wells mm and strength limits of solid inclusions and deads in case of tension and accordingly, Pa, and for charging of the wells one and the same industrial explosive (IE) is used.

EFFECT: invention makes it possible to increase efficiency and evenness of crushing of massifs of various strength due to provision of contact between zones of controlled crushing within solid inclusions as IE charges are exploded in main and additional wells and to expand field of application.