Technology Research on Crossheading Deep-hole Pre-splitting Blasting Hard Dirt Band

Aiming at the situation that 16^# coal seam contains iron sulfide hard band in Geting coal mine of Zibo Mining Group Co.,Ltd,based on the analysis of deep-hole pre-splitting theory,the paper proposed the materials and processes of deep-hole pre-splitting blasting and introduced the parameters of borehole spacing,borehole depth,charge amount.