FIELD: blasting.
SUBSTANCE: invention relates to blasting and may be used in mining industry in blasting of lengthy pieces of rocks of various strength. Invention consists in the fact that well blasting is carried out with number of wells in a row equal to 5 and with delay between sections equal to (10÷15)×a ms, where a - distance between wells in a row, wells in a wedge explode relative to each other with the delay equal to (15÷25)×b ms, where b - distance between rows of wells, besides, at first well is exploded, which is arranged in the top of wedge, and then - in the order of moving away from top of wedge.
EFFECT: reduced height of heap of exploded rock mass, less throwing of exploded rock mass, reduction of seismic effect from mass explosion and increased quality of rock mass grinding.
1 dwg
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