Practice of increasing middle-deep hole blasting quality;

The blasting quality was consolidated and enhanced by the establishment and implement of blasting quality control system.

This offers reliable basis for confirming the predicting and blasting optimizing parameter, and offers the theoretical foundation for raising the blasting quality.

By means of controlling appropriate interval of firing time between holes and holerows and adopting high-precision detonator,the shape of muckpile and the size of rock broken can be controlled effectively,thus achieving high quality of blasting and decrement of mining cost.

Discussion on the way of improving blasting effect in open pit of Yinshan Lead zinc Mine;

The way of improving medium-length hole blasting effect in mine stope;