Efficient cut blasting method for medium-length holes in deep high-stress rock roadway based on crustal stress induction effect
US12332038B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2023 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Aug 22, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D3/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An efficient cut blasting method for medium-length holes in deep high-stress rock roadway is disclosed. The method may comprise steps of carrying out a crustal stress blasting test on the free face of the in-situ rock roadway to be excavated, and obtaining a distribution state of cracks under a synergistic action of crustal stress, explosion stress waves and clamping force of surrounding rock of a rock mass in the stratum where the in-situ rock roadway to be excavated is located; arranging a cutting hole net on the free face of the rock roadway to be excavated according to a distribution state of the cracks; performing cut blasting based on the cutting hole net.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.