GROUPED EXPLOSIVE COLUMN SAME MILLISECOND BLASTING

Multiple row same millisecond blasting is a new technique, new technology, resulted by sustained seeking and improving efforts of the technician of Shizishan Copper Mine in more than 20 years' practice for about thousand times of large scale blasting since 1967. Applying new blasting parameters, igniting the same-millisecond detonator for grouped holes blasting, enable the work of blasts to act simultaneously on the rock, the work duration to be prolonged and the effective utilization of blast work to be increased. This blasting technique, called by name "Z·T blasting" according to Chinese initialism, is applicable for various ores and rocks, for various explosives, for large, medium and small blastholes and for caving by various mining methods.