Creep modelling study of a surface support liner

Date

2018-06-24

Author

Güner, Doğukan
Öztürk, Hasan

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Surface supports are widely used in underground excavations. Since conventional surface support liners have inherently-brittle characteristics and require longer curing period, an alternative support system using polymer based surface support liner, thin spray-on liners (TSLs), has been observed to have a promising ductile and fast-curing potential for underground operations. TSLs can exhibit a good performance for highly-stressed, deep, rock bursting conditions as well when used together with rock bolts and wire mesh for reinforcement and retaining purposes. However, uncertainty in the time-dependent behavior of TSLs under sustained constant loading conditions prevents full understanding of TSL support behavior. In this basis, this research aims to reveal the time-dependent creep behaviour of TSLs and to develop different creep models. In this study, creep tests were performed for 2-day cured dogbone TSL specimens under the dead weights (80, 60, 40, and 20 % of the tensile strength) for 23 +/- 2 degrees C laboratory conditions. Descriptive parameters of the TSL creep model were determined by power series, Burger's and multi Kelvin-Voight model. The study results presented the time-dependent behavior of a TSL for different constant loading conditions. In this sense, a TSL creep models constituted for 4 different stress levels. The proposed models create a basement for the future numerical studies.

Subject Keywords

Thin spray-on liner, Creep, Surface support, power series, Burger's model, Kelvin-Voight model

URI

https://hdl.handle.net/11511/41713

DOI

https://doi.org/10.1063/1.5051106

Collections

Department of Mining Engineering, Conference / Seminar

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Citation Formats

D. Güner and H. Öztürk, “Creep modelling study of a surface support liner,” 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41713.