METHOD TO PERFORM BLAST-HOLE DRILLING Russian patent published in 2013 - IPC F42D3/04 

FIELD: mining.

SUBSTANCE: method to perform blast-hole drilling in opencast mines includes division of rock massifs into districts according to parameters of drilling energy intensity and validation of division following the breaking results. Division is validated by the value of the ratio of the drilling energy intensity index in the upper part of the wells in the current horizon block, which are drilled in an outstanding zone of the well-to-well space of the above previously mined block, to drilling energy intensity in the overdrill zone of wells that form this well-to-well space of the previously mined above block.

EFFECT: invention makes it possible to increase efficiency of blast-hole drilling and division of rocks into districts by explosibility, to reduce costs for explosives, drilling and breaking of rocks, to reduce losses of wells from caving, to improve quality of rocks crushing and finalisation of a ledge foot.

3 dwg