Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Transfer Mechanics of Full-Column Resin-Grouted Roof Bolts
The U.S. Bureau of Mines conducted a laboratory investigation designed to evaluate the stress and deformation characteristics of fully grouted roof buolts subjected to various magnitudes of end loadings. The experiment and subsequent analysis were completed, utilizing axial deformation data obtained ultrasonically from forty-one 4-ft, grade 40 roof bolts, with a total of 132 measurement locations along the lengths of the bolts. The ultrasonic measurement instrumentation used in the investigation allowed for elongation measurements without requiring extensive bolt modifications. The results indicate that approximately 39 percent of the applied end load dissipated within the first 3.4 inch of the bolts. However, only 3 percent of the applied load was realized beyond 28 inches of the grout column. Data are presented individually for every 6-inch increment of bolt length; analysis was performed using statistical, nonlinear equations developed for 5,000- and 8,000-lb loading conditions.
Transfer Mechanics of Full-Column Resin-Grouted Roof Bolts
The U.S. Bureau of Mines conducted a laboratory investigation designed to evaluate the stress and deformation characteristics of fully grouted roof buolts subjected to various magnitudes of end loadings. The experiment and subsequent analysis were completed, utilizing axial deformation data obtained ultrasonically from forty-one 4-ft, grade 40 roof bolts, with a total of 132 measurement locations along the lengths of the bolts. The ultrasonic measurement instrumentation used in the investigation allowed for elongation measurements without requiring extensive bolt modifications. The results indicate that approximately 39 percent of the applied end load dissipated within the first 3.4 inch of the bolts. However, only 3 percent of the applied load was realized beyond 28 inches of the grout column. Data are presented individually for every 6-inch increment of bolt length; analysis was performed using statistical, nonlinear equations developed for 5,000- and 8,000-lb loading conditions.
Transfer Mechanics of Full-Column Resin-Grouted Roof Bolts
S. C. Tadolini (Autor:in) / R. C. Dyni (Autor:in)
1991
20 pages
Report
Keine Angabe
Englisch
Full-Column Grouted Rock Bolts and Support Pressure
| British Library Conference Proceedings | 2006