Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Delayed Blasting Tests to Improve Highwall Stability-A Final Report
The Bureau of Mines conducted a series of delayed blasting experiments at a Barbour County, WV, contour coal mine that resulted in smoother highwalls. The highwalls were smoother due to reduced overbreak (excessive rock breakage beyond the excavation limit) and were inherently safer due to reduced likelihood of rockfall. The experiments were directed at reducing overbreak without special drilling or significant additional cost. Reduced overbreak was accomplished by increasing the highwall hole delays, which changed the effective delay pattern geometry and the direction of burden movement.
Delayed Blasting Tests to Improve Highwall Stability-A Final Report
The Bureau of Mines conducted a series of delayed blasting experiments at a Barbour County, WV, contour coal mine that resulted in smoother highwalls. The highwalls were smoother due to reduced overbreak (excessive rock breakage beyond the excavation limit) and were inherently safer due to reduced likelihood of rockfall. The experiments were directed at reducing overbreak without special drilling or significant additional cost. Reduced overbreak was accomplished by increasing the highwall hole delays, which changed the effective delay pattern geometry and the direction of burden movement.
Delayed Blasting Tests to Improve Highwall Stability-A Final Report
V. J. Stachura (Autor:in) / L. R. Fletcher (Autor:in) / M. A. Peltier (Autor:in)
1986
19 pages
Report
Keine Angabe
Englisch
Mineral Industries , Coal mining , Blasting , Walls , Delay time , Stability , Safety
| British Library Online Contents | 2015
Highwall augering in Centre County, Pennsylvania
Engineering Index Backfile | 1954