Efficient blasting method for similar cutting in rock tunnel
US11976914B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 20, 2023 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Sep 20, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D3/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An efficient blasting method for similar cutting in a rock tunnel is provided, which relates to the technical field of rock tunneling. The method includes the following steps: drilling: drilling central holes, lower cutting holes, upper cutting holes, auxiliary holes and peripheral holes in a cross section area for tunnel construction; filling explosives: filling explosives into the central holes, the lower cutting holes, the upper cutting holes, the auxiliary holes and the peripheral holes; and blasting: blasting following blast holes in turn to complete full-face one-time blasting in a millisecond delay blasting mode. The method is applicable for construction scenes of drilling and blasting methods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.