Large-diameter Long-hole Full-length Cumulative Cutting Blasting Control Technology under the Condition of Adjacent to Filling Body

For the pillar stope adjacent to the filling body, in order to reduce the damage of blasting to the filling body as much as possible, the large-diameter long-hole full-length cumulative cutting blasting control technology is used for the side hole. The special PVC cumulative pre-cutting pipe is used for the side hole, the strip charge and the air column are distributed at intervals, and the accurate positioning device of blasting cutting line is used in the process of lowering. Compared with the previous side hole blasting control technology based on loose blasting and smooth blasting, this technology controls the damage caused by the impact energy entering the filling body through the heterogeneous interface, so as to realize the concentrated release of blasting energy in the target direction and directional rock breaking.