A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A description of problems encountered in using uncontrolled blasting techniques for rock excavations in Alabama is presented. Also discussed is a comparatively new development in Alabama rock excavation methods, rock presplitting. The rock presplitting method of blasting to control cut slopes is described, including specifications and variations in drill hole size, depth and on-center spacing, explosives and stemming. An effective technique to locate boreholes in a presplit cut is described in this report. Conclusions reached in this study indicate that in Alabama: (1) The presplitting method produced excellent results in controlling the back slopes in rock excavations, and (2) At this time, no guidelines are available to select drill hole spacing and charge used in blasting rock by the presplitting method.
A description of problems encountered in using uncontrolled blasting techniques for rock excavations in Alabama is presented. Also discussed is a comparatively new development in Alabama rock excavation methods, rock presplitting. The rock presplitting method of blasting to control cut slopes is described, including specifications and variations in drill hole size, depth and on-center spacing, explosives and stemming. An effective technique to locate boreholes in a presplit cut is described in this report. Conclusions reached in this study indicate that in Alabama: (1) The presplitting method produced excellent results in controlling the back slopes in rock excavations, and (2) At this time, no guidelines are available to select drill hole spacing and charge used in blasting rock by the presplitting method.
Presplitting Techniques in Rock Excavation
J. H. David (author)
1965
25 pages
Report
No indication
English
| NTIS | 1974
Presplitting : A controlled blasting technique for rock cuts
| TIBKAT | 1966
Presplitting cuts clean faces at two tough rock jobs
| Engineering Index Backfile | 1963
Presplitting rock in presence of static stress field
| Engineering Index Backfile | 1966