Abstract:
The basic principle of deep hole break-tip blasting was introduced, and the process of it was analyzed in details. The detailed scheme was designed, and the deep hole break-tip blasting was carried out successfully by manual charging. The results showed that the deep hole break-tip blasting changed the structure of overlying strata, increased the degree of roof fracture, which effectively released the energy stored in roof, avoided the stress concentration. This charging method also reduced the labor intensity and improved the charging speed, thus prevented the rock burst efficiently.