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- Title
Quality assurance considerations for friction rock stabilizers.
- Authors
Hadjigeorgiou, J.; Thorpe, S. J.; Cole, K. M.
- Abstract
Friction rock stabilizers (FRS) are routinely used to provide rock reinforcement to excavations in hard rock. Since the expiration of the original patent taken out in 1977, FRS are now available from multiple suppliers. The expectation that all FRS are equivalent, however, is not necessarily accurate. There are inherent variations in the design configuration, material chemistry/properties, and consequently in performance. In this context, a full traceability from steel grade and heat treatment to final product is critical. This paper reports the results of a QA/QC investigation aiming to identify the material properties for three equivalent FRS from the same supplier. A series of mechanical and accelerated corrosion tests highlighted the differences in these rockbolts. This work provides a template for a more comprehensive quality assurance programme to ensure compliance of FRS. This is critical when rockbolts, due to global supply chain constraints, are outsourced from multiple sources worldwide.
- Subjects
QUALITY assurance; ROCK excavation; HEAT treatment of steel; FRICTION; ACCELERATED life testing
- Publication
Mining Technology (2572-6668), 2023, Vol 132, Issue 1, p17
- ISSN
2572-6668
- Publication type
Article
- DOI
10.1080/25726668.2022.2151112