Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting
US5803550A · kind A · utility
16Cited by
32References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1996 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Aug 7, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C37/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is directed to a method for breaking rock and other hard materials using small-charge blasting techniques followed by a mechanical impact breaker. In small-charge blasting techniques, a gas is released into the bottom of a sealed hole located in a free surface of the hard material. The gas pressure rises rapidly in the hole until the gas pressure causes the hard material to fracture. The impact breaker is then used to complete fracturing of the material and to remove the fractured material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.