Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
An Investigation of the Interaction of Rock and Types of Rock Bolts for Selected Loading Conditions
The objective of this research was to investigate the interaction phenomena of rock and types of rock bolts to develop design principals for using grouted roof bolts. The investigation was to determine the effectiveness of grouted bolts in resisting lateral displacement and axial separation along fracture planes, and also to determine if grouted bolts eliminate the axial tensile stress near the anchor and the resulting rock fracture. The first year objective, which involved defining the post tensioning response of grouted bars and determining the amount of shear resistance generated by conventional and resin-grouted bolts, was achieved. The second year objectives were to make additional shear tests, conduct creep tests, and continue the theoretical analysis of the support mechanism of rock bolts. Finite-element analysis showed that high stress concentrations are created when an expansioned-anchor bolt separates. The stress distribution in a mine roof structure not subjected to lateral loading is not affected significantly when bolts are installed.
An Investigation of the Interaction of Rock and Types of Rock Bolts for Selected Loading Conditions
The objective of this research was to investigate the interaction phenomena of rock and types of rock bolts to develop design principals for using grouted roof bolts. The investigation was to determine the effectiveness of grouted bolts in resisting lateral displacement and axial separation along fracture planes, and also to determine if grouted bolts eliminate the axial tensile stress near the anchor and the resulting rock fracture. The first year objective, which involved defining the post tensioning response of grouted bars and determining the amount of shear resistance generated by conventional and resin-grouted bolts, was achieved. The second year objectives were to make additional shear tests, conduct creep tests, and continue the theoretical analysis of the support mechanism of rock bolts. Finite-element analysis showed that high stress concentrations are created when an expansioned-anchor bolt separates. The stress distribution in a mine roof structure not subjected to lateral loading is not affected significantly when bolts are installed.
An Investigation of the Interaction of Rock and Types of Rock Bolts for Selected Loading Conditions
C. J. Haas (Autor:in) / H. D. Keith (Autor:in) / R. N. Nitzsche (Autor:in) / J. Dave (Autor:in) / R. L. Hoffmann (Autor:in)
1975
353 pages
Report
Keine Angabe
Englisch
| Engineering Index Backfile | 1954