Composite material tendons are considered in this thesis as interior ground support for underground excavations. The physical and mechanical properties of composite tendons critical to mining requirements were identified. Preliminary laboratory investigations were also undertaken to evaluate their performance as fully grouted reinforcing tendons. Arapree, a flexible tendon, and Weldgrip, a solid tendon, are the two patented composite tendons found to be superior in pull out testing. Their load carrying capacity and ductility in the elastic range is similar to that of existing steel supports, although their post peak performance is different. Rigid composite bolts have more load sustaining capacity than their steel counterparts, while flexible composite tendons have less capacity than conventional seven wire flexible steel cable. The shear capacity of fully grouted Weldgrip bolts was found to be in the range of 100 kN. As part of studies of flexible tendons, conventional steel cable was also used to investigate other parameters, since it was found to be identical in pull out behaviour to composite flexible cable. It was found that the effect of grout strength and modulus, radial confinement and host medium strength and stiffness is significant in controlling the performance of steel cable. The laboratory investigation also found that different grouting materials, such as conventional to high strength cement grout and polyester resin grout greatly influence the pull out performance of both steel and composite tendons.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.28800 |
| Date | January 1994 |
| Creators | Khan, Umar |
| Contributors | Hassani, F. P. (advisor), Mitri, H. S. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Mining and Metallurgical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001448057, proquestno: NN05733, Theses scanned by UMI/ProQuest. |
Page generated in 0.0165 seconds