Delayed blasting tests to improve highwall stability. A progress report. Report of investigations/1984
Technical Report
·
OSTI ID:5722862
The Bureau of Mines conducted a series of delayed blasting experiments at a West Virginia contour coal mine that resulted in smoother highwalls. The highwalls were smoother due to reduced overbreak and inherently safer due to reduced likelihood of rockfall. Reduced overbreak was accomplished by an increase in the highwall hole delays, which changed the effective delay pattern geometry and the direction of burden movement. The results of the blast delay changes were evaluated using terrestrial photogrammetry to generate vertical profiles at regular intervals. This evaluation showed that delay changes produced generally smoother vertical profiles.
- Research Organization:
- Bureau of Mines, Twin Cities, MN (USA). Twin Cities Research Center
- OSTI ID:
- 5722862
- Report Number(s):
- PB-85-160141/XAB; BM-IC-8916
- Country of Publication:
- United States
- Language:
- English
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