| 摘要 |
A method for carrying out drill-blast operations at a ledge of rocks includes drilling holes with placement of those in rows along the upper edge of the ledge, charging those with explosive, mounting explosive network and short-delay firing of the charges of explosive. The rows for following interaction of charges are arranged in pairs. In the first rows of each pair, at considering the one placed closer to the slope of the ledge to be the first, detachment chargers are formed according to the certified values of the known method, and in the second ones – as decreased. The invention makes it possible to use better the potential energy of the explosive for breakage of rocks, with decrease of cost of drill-blast works. |
