Authors: Kanda, MJ; Stacey, TR

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DOI https://doi.org/10.36487/ACG_rep/1905_27_Kanda

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Kanda, MJ & Stacey, TR 2019, 'Review of the practical effectiveness of thin spray-on liners based on information from suppliers and observations from the mining industry', in J Wesseloo (ed.), MGR 2019: Proceedings of the First International Conference on Mining Geomechanical Risk, Australian Centre for Geomechanics, Perth, pp. 443-458, https://doi.org/10.36487/ACG_rep/1905_27_Kanda

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Abstract:
Thin spray-on liners (TSLs) provide areal support to rock excavation surfaces, and have been implemented in the mining sector for over 20 years. However, scepticism over their usage still prevails, despite the results of laboratory research that has been carried out indicating their effectiveness for use in mines. The study described in this paper aims to highlight TSL performance as viewed by the mining industry. Some underground cases of practical performance have been singled out and compared with the expected performance based on information from suppliers and from laboratory testing perspectives, and the causes of the resulting quality of performances were categorised. Among the causes of the discrepancies between expectations and observations is the lack of inclusion of parameters such as temperature and humidity in the laboratory tests, which could have significant effects on the liner performance since, based on results from Brazilian indirect tensile tests on coated samples, their inclusion doubles the probability of failure and therefore, increases the predicted geotechnical risk of failure. Consequently, to take into account potential performance discrepancies, some existing recommendations and further potential recommendations are suggested in the paper. If later validated, these suggestions could be included in a good practice guideline for TSL application in underground mines.

Keywords: thin spray-on liners, tensile strength, membrane displacement test, suppliers, laboratory, mining, response surface methodology, probability of failure, geotechnical risk

References:
Archibald, J 2004, ‘Canadian laboratory and field testing’, in Y Potvin, TR Stacey & J Hadjigeorgiou (eds), Surface Support in Mining, Australian Centre for Geomechanics, Perth, pp. 73–87.
Archibald, JF & DeGagné, DO 2000, ‘Recent Canadian Advances in the application of spray-on polymeric linings’, Mining Health and Safety Conference, Sudbury.
ASTM 2010, Standard Test Method for Tensile Properties of Plastics, American Society for Testing Materials Committee D-20 on Plastics.
Guner, D & Ozturk, H 2017, ‘Tensile-creep test specimen preparation practices of surface support liners’, IOP Conference Series: Earth and Environmental Science, vol. 95, p. 042004.
Guner, D & Ozturk, H 2016, ‘Experimental and numerical analysis of the effects of curing time on tensile mechanical properties of thin spray-on liners’, Rock Mechanics and Rock Engineering, vol. 49, issue 8, pp. 1–18.
Kanda, M & Stacey, T 2016, ‘The influence of various factors on the results of stability analysis of rock slopes and on the evaluation of risk’, Journal of the Southern African Institute of Mining and Metallurgy, vol. 116, issue 11, pp. 1075–1081.
Kuijpers, JS 2004, ‘Evaluation of thin spray-on liners support behaviour’, in Y Potvin, TR Stacey & J Hadjigeorgiou (eds), Surface Support in Mining, Australian Centre for Geomechanics, Perth, pp. 103–112.
Lacerda, L & Rispin, M 2002, ‘Current ground support membrane applications in North American underground mines’, Proceedings of the 2nd International Seminar on Surface Support Lines: Thin Sprayed Liners, Shotcrete and Mesh, South African Institute of Mining and Metallurgy, Johannesburg.
Morton, EC, Thompson, AG & Villaescusa, E 2008, ‘Static testing of shotcrete and membranes for mining applications’, in TR Stacey & DF Malan (eds), Proceedings of the 6th International Symposium on Ground Support in Mining and Civil Engineering Construction, SANIRE, SAIMM and ISRM, Cape Town, pp. 195–212.
Mpunzi, P, Masethe, R, Rizwan, M & Stacey, T 2015, ‘Enhancement of the tensile strengths of rock and shotcrete by thin spray-on liners’, Tunnelling and Underground Space Technology, vol. 49, pp. 369–375.
Pappas, DM, Barton, TM & Weiss, ES 2004, ‘The long-term performance of surface support liners for ground control in a underground limestone mine’, in Y Potvin, TR Stacey, & J Hadjigeorgiou (eds), Surface Support in Mining, Australian Centre for Geomechanics, Perth, pp. 157–166.
Potvin, Y, Stacey, TR & Hadjigeorgiou, J 2004, Surface Support in Mining, Australian Centre for Geomechanics, Perth.
Spearing, A, Ohler, J & Attiogbe, E 2001, ‘The effective testing of thin support membranes (superskins) for use in underground mines’, An International Seminar and Field Trials on Surface Support Liners: Membrane, Shotcrete and Mesh, Australian Centre for Geomechanics, Perth, Section 26.
Stacey, TR 2001, ‘Review of membrane support mechanisms, loading mechanisms, desired membrane performance, and appropriate test methods’, The Journal of The South African Institute of Mining and Metallurgy, vol. 101, issue 7, pp. 343–352.
Stacey, TR & Kasangula, K 2004, ‘Results from testing of TSLs using a simple, low cost laboratory test’, in Y Potvin, TR Stacey & J Hadjigeorgiou (eds), Surface Support in Mining, Australian Centre for Geomechanics, Perth, pp. 147-150.
Tannant, D 2001, ‘Thin spray-on liners for underground rock support testing and design issues’, An International Seminar and Field Trials on Surface Support Liners: Membrane, Shotcrete and Mesh, Australian Centre for Geomechanics, Perth, Section 27.
Tannant, D, Swan, G, Espley, S & Graham, C 1999, ‘Laboratory test procedures for validating the use of thin spray-on liners for mesh replacement’, Proceedings of the 101st Annual General Meeting, Canadian Institute of Mining, Metallurgy and Petroleum, Westmount.
Yilmaz, H 2010, ‘Tensile strength testing of thin spray-on liner products (TSLs) and shotcrete’, The Journal of The South African Institute of Mining and Metallurgy, vol. 110, issue 10, pp. 559–569.
Yilmaz, H 2011, Development of Testing Methods for Comparative Assessment of Thin Spray-on Liner (TSL) Shear and Tensile Properties, PhD thesis, University of the Witwatersrand, Johannesburg.
Yilmaz, H 2014, ‘Comparison of tensile strength of shotcrete and thin spray-on liners (TSLs)’, Proceedings of the 8th Asian Rock Mechanics Symposium, International Society for Rock Mechanics and Rock Engineering, Lisbon, pp. 177–182.




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