INFLUENCE EXERTED BY CONSTRUCTION OF VERTICAL CYLINDRICAL EXPLOSIVE CHARGES INCREASED IN DIAMETER ON THE DEGREE OF ORE SHATTERING

摘要

The results are presented for the laboratory and in-situ investigations into influence exerted by construction of the vertical cylindrical explosive charges on the degree of rock-mass shattering. The necessity is shown for creating the ascending workings with a cross-section up to 1. m~2. For the vertical concentrated charges with inert gaps, the drilling-and-blasting parameters ensuring a decrease in specific consumption of explosive for the secondary shattering are given.