PROCESS DRIVING RAISE Russian patent published in 2003 - IPC

FIELD: mining industry, blasting operations to drive raises. SUBSTANCE: objective of invention consists in increased efficiency of sectional breaking by explosive charges thanks to raised accuracy of selection, order and delayed blasting of holes in outline of raise which enables cost of one running meter of raise to be reduced and specific consumption of explosives to be diminished. Process driving raise includes drilling of singular holes through height of raise, mine survey of drilled holes, charging of holes with explosives, initiation and sectional blasting of explosive charges in holes. Mine survey of mouth and bottom of each hole is conducted in single coordinate system x-y, value of displacement of holes at any required height of raise relative to points of sinking of mouth and bottom of holes is determined by given formulas. Then order and degree of delay of hole blasting are established by obtained parameters of increments of coordinates. First holes with least parameters of increments of coordinates are blasted. EFFECT: increased efficiency of raise driving. 6 dwg