Comparison of tensile-bond strength of thin spray-on liners

Yılmaz, Halil

doi:10.1080/17480930.2012.665219

Cited by 17 publications

(12 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Through this approach, it would therefore be possible to dissipate the scepticism and to provide best-practice guidelines. TSL properties have been estimated and measured in the laboratory and generally show higher tensile strengths than shotcrete (Yilmaz 2014). This mechanical property, along with the elongation strength and the tensile bond strength, have been indicated by Potvin et al (2004) to be the most important mechanical properties of thin membranes.…”

Section: Introductionmentioning

confidence: 92%

“…Afterward, data of the applied force versus displacement are recorded for further analyses. Thin membranes are capable of accommodating larger deformations than shotcrete (Tannant 2001;Yilmaz 2014), and because of this characteristic they are preferred to other types of support (Stacey 2001) and should perhaps be on a par with mesh support. However, this possibility does not meet absolute approval as there exist contradictory results from works by Archibald (2004), Morton et al (2008), Spearing et al 2001, and Stacey and Kasangula (2004).…”

Section: Membrane Displacement Testmentioning

confidence: 99%

See 1 more Smart Citation

Review of the practical effectiveness of thin spray-on liners based on information from suppliers and observations from the mining industry

Kanda¹,

Stacey²

2019

Proceedings of the First International Conference on Mining Geomechanical Risk

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 92%

Section: Membrane Displacement Testmentioning

confidence: 99%

Review of the practical effectiveness of thin spray-on liners based on information from suppliers and observations from the mining industry

Kanda¹,

Stacey²

2019

Proceedings of the First International Conference on Mining Geomechanical Risk

View full text Add to dashboard Cite

show abstract

“…Bae et al [8] obtained the tensile strength, cohesion, friction angle, shear stiffness, and normal stiffness of the joints of shotcrete-surrounded rock at different ages through the indoor direct shear test. Yilmaz [9] introduced a test method for testing the shear strength of thin-layer shotcrete and rock contact surfaces invented by the Rock Mechanics Laboratory of Kingsoft University in South Africa. Son [10] used the bulk discrete element program to analyse the sensitivity of shotcrete-rock coupling to some factors, including contact surface roughness, rock strength and Young's modulus, tunnel excavation disturbance or the size of the surrounding rock, the mechanical properties of the contact surface, the thickness of the shotcrete, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Duan

Zhang

Lai

2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Long and deep tunnels are increasingly designed and built worldwide, often in severe geothermal environments characterized by high temperature in the rocks. is issue cannot be ignored because high temperature definitely affects the strength of the adhesion between the concrete and the surrounding rocks, whatever the lining cast in place, segmental or sprayed using shotcrete. e causes of geothermal heat and the effect of the temperature on tunnel linings during and after their construction are recalled and discussed in this paper. Both temperature and humidity are shown to be the most relevant factors affecting adhesion strength, whose loss is related to the microdamage in the shotcrete layers closest to the rock. Possible ways to improve adhesion strength and to minimize the high-temperature detrimental effect are also presented and discussed.

show abstract

“…The manufacture of a number of TSL products has been stopped, since they do not possess adequate physical or chemical properties. However, newer products are continuously developed and introduced (Yilmaz, 2007).…”

mentioning

confidence: 99%

“…TSL materials for the mining industry were initially designed as sealants to limit the weathering of rock, and later were intended to be used as a substitute for mesh or shotcrete (Spearing et al, 2009;Yilmaz, 2007). The idea of using TSLs as surface support was initiated in the late 1980s in Canada and was originated by the thought that a liner as thin as 5 mm should perform the same as, or even better than, shotcrete (Archibald, 2004;Yilmaz, 2011).…”

mentioning

confidence: 99%

Potential use of thin spray-on liners for gas management in underground coal mines

Saydam

Mitra

et al. 2016

J. South. Afr. Inst. Min. Metall.

View full text Add to dashboard Cite

Coal seam gas problems can adversely affect the safety and productivity of underground coal mines, leading to fatalities and financial losses. Conventional gas management technologies using ventilation and gas drainage are unable to deal with the high and irregular gas emissions associated with high-production longwall mining. New technologies need to be developed to supplement the traditional gas management techniques to minimize the hazard of coal seam gas. Thin spray-on liners (TSLs) have gained some success for rock surface support since their introduction to the mining industry. Due to their relatively low permeability and appropriate mechanical properties, TSLs also show potential to be used as a gas management tool in underground coal mines.In this paper we review the current gas management challenges and discuss the potential use of TSLs as a gas management tool in underground coal mines. This may involve reducing gas migration into the excavations/roadways, enhancing in-seam gas drainage, and preventing spontaneous combustion. Some potential areas for future research work are identified. thin spray-on liner (TSL), gas management, underground coal mining.

show abstract

Comparison of tensile-bond strength of thin spray-on liners

Cited by 17 publications

References 1 publication

Review of the practical effectiveness of thin spray-on liners based on information from suppliers and observations from the mining industry

Review of the practical effectiveness of thin spray-on liners based on information from suppliers and observations from the mining industry

Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Potential use of thin spray-on liners for gas management in underground coal mines

Contact Info

Product

Resources

About