A Pattern for Improvement

摘要

Afiring pattern is like an electrical circuit, providing a pathway for a detonation wave in order that explosive charges in the blastholes can be initiated. In any blasting programme the foremost requirement is sequential generation of free face (with the blast progression). To this end, the firing pattern determines the movement and direction of rock by creating free face for subsequent blastholes/rows. Extensive work has been reported by various researchers on different types of firing pattern (row-to-row, diagonal, Ⅴ-type and skewed Ⅴ-type.