Fracture mechanics interpretation of thin spray-on liner adhesion tests
Source abstract
Abstract
Thin spray-on liners (TSLs) are relatively thin (2–5 mm) fast setting liner materials that are sprayed onto rock surfaces to support mining excavations. The adhesive strength between a TSL and a rock surface is an important property controlling the design and performance of TSL rock support systems. In this study, direct pull-off TSL adhesion tests were interpreted based on a fracture mechanics approach. An edge crack propagation equation for a generic case ( ν ≠0.5) was derived and the failure modes of TSLs were studied. It was found that the current TSL adhesion test sample geometries show confined behaviour, the failure mode of the tests are edge crack propagation. Bulk cavitation of TSLs can only occur for very compliant samples ( E<0.6 MPa). Adhesion tests done on a TSL product, Tekflex, applied on concrete substrates were examined to verify the edge crack propagation.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Geotechnical Engineering and Underground Structures · Rock Mechanics and Modeling · Tunneling and Rock Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
1. Review of membrane support mechanisms, loading mechanisms, desired membrane performance and appropriate test methods
2. Tannant · 2001
3. Thin spray-on liner adhesive strength test method and effect of liner thickness on adhesion10.1016/j.ijrmms.2010.05.004 ↗
4. Support to rock excavations provided by sprayed liners10.1016/j.ijrmms.2007.09.001 ↗
5. Support provided to rock excavations by a system of two liners10.1016/j.ijrmms.2009.01.006 ↗
6. Crack repair using an elastic filler10.1016/j.jmps.2008.06.001 ↗
7. Thin rock support liners modeled with particle flow code
8. Dirige, APE, Archibald, JF. Numerical modeling simulations of spray-on liners support potential in highly stressed and rockburst prone rock conditions. Proc. 3rd Canada–US Rock Mechanics Symp., in: Grasselli, G. and Diederichs, M. (Eds.), Toronto (2009)
9. Shear-bond strength testing of thin spray-on liners
10. Influence of rock properties and environmental conditions on adhesive bond to a thin liner
11. Minova, 〈www.minova.com.au/products/〉, Minova Australia, accessed February 15, 2011.
12. Araldite 2011, 〈http://www.intertronics.co.uk/data/ara2011.pdf〉, Araldite 2011 Structural Adhesive, accessed February 15, 2011.
13. Deformation and failure modes of adhesively bonded elastic layers10.1063/1.1288017 ↗
14. Fracture mechanics and the adherence of viscoelastic bodies10.1088/0022-3727/11/14/011 ↗
15. Fingering instabilities of confined elastic layers in tension10.1103/PhysRevLett.84.3057 ↗
16. The distribution of stress in the neighborhood of a crack in an elastic solid10.1098/rspa.1946.0077 ↗
17. Fracture mechanics and cavitation in rubber-like materials10.1007/BF01124691 ↗
18. Saydam, S, Docrat, YS. The second half century of Rock Mechanics, 11th Congress of the International Society for Rock Mechanics, 3 volumes+CD-ROM, in: Olalla, C., Grossmann, N., Ribeiro e Sousa, L. (Eds.), Taylor & Francis, 2007.
19. Archibald, JF. Canadian laboratory and field testing. Proc. Int. Seminar on Surface Support Liners (Section 23 – Laboratory and Field Research Session, Session 7). Australian Centre for Geomechanics, Perth, Australia, 2001, pp. 1–35.
20. Tannant, DD, Swan, G, Espley, S, Graham, C. Laboratory test procedures for validating the use of thin spray-on liners for mesh replacement. Proc. Canadian Institute of Mining, Metallurgy and Petroleum 101st Annual General Meeting, Calgary, Alberta, published on CD-ROM, 1999, 8 p.
21. Lewis · 2001
22. Ozturk, H. Adhesion between thin spray-on liners and rock or concrete. PhD Thesis, University of Alberta, Canada, 2005, 129 pages.
23. Work of adhesion of thin spray-on liners