A borehole packing device for reducing post-blast top and bottom muck and a method of using the same
By optimizing the charge distribution through the use of hollow tubular packing devices in open-pit mine blasting, the problem of high top and bottom block ratio was solved, achieving the effects of reducing costs and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTH BLASTING TECH
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for reducing the proportion of large blocks at the top and bottom of blast holes in open-pit mine blasting typically require increasing the amount of explosives used, leading to increased costs or the use of complex spacing devices that increase detonator costs, and the effects are not significant.
A hollow tubular packing device is adopted, including an elastic serrated top cover and a foot line fixing structure. By optimizing the charge distribution in the borehole, the hollow tube body is used to increase the charge height, prevent borehole punching, maintain continuous detonation, and reduce the top and bottom large block ratio.
Without increasing the total charge per hole, the rate of large blocks at the top and bottom was reduced, detonator costs were saved, the uniformity and safety of the charge were improved, and misfires were prevented.
Smart Images
Figure CN122408563A_ABST