Creep modelling study of a surface support liner

Güner, Doğukan
Öztürk, Hasan
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.


Creep behaviour analysis of thin spray-on liners
Güner, Doğukan; Öztürk, Hasan; Department of Mining Engineering (2020)
Thin Spray-on Liner (TSL) is a relatively thin (2–5 mm) and fast-setting liner material used by spraying onto rock surfaces to support underground excavations. Areal support materials that are sprayed onto the rock, such as shotcrete or liners, are able to generate support resistance at small rock deformations and can prevent underground rockfalls from happening in the first place. However, where large ground convergence occurs, the more flexible TSLs may provide superior support over the full range of rock...
Optimum topology design of various geometrically nonlinear latticed domes using improved harmony search method
Carbas, Serdar; Saka, Mehmet P. (2012-03-01)
Domes are elegant and economical structures used in covering large areas. They are built in various forms. According to their form, they are given special names such as lamella, network, and geodesic domes. In this paper, optimum topological design algorithm is presented that determines the optimum number of rings, the optimum height of crown and tubular section designations for the member groups of these domes. The design algorithm developed has a routine that generates the data required for the geometry o...
Erkayaoğlu, Mustafa; Kırmacı, Alper (2019-09-01)
Rock bolts are widely used in tunnels, underground openings, and also rock slopes to provide support and attach blocks to therock mass in various engineering fields. They have a significant role for the stability of underground structures and natural rock slopes bothin the mining and civil engineering industry. The understanding of the rock bolt behavior under stress conditions plays a key role in the longterm stability and sustainability of rock slopes, nearby structures, and underground openings. The dete...
Creep effects on elastomeric and ball rubber bearings under sustained lateral loads
Natale, Andrea; Del Vecchio, Ciro; Di Ludovico, Marco; Caner, Alp; Naghshineh, Ali Karimzadeh; Jacak, Mary (2022-01-01)
Base isolation applications are becoming popular in the seismic design of resilient structures and infrastructures. Even though the response of the bearings is widely studied under cyclic displacements, limited information is available for bearing response under sustained lateral loads. These types of loads can develop sustained lateral displacement in the bearing. During the holding time under sustained lateral displacement, the creep or stress relaxation may significantly change the properties of the bear...
Optimum topological design of geometrically nonlinear single layer latticed domes using coupled genetic algorithm
Saka, M. P. (2007-11-01)
Single layer latticed domes are lightweight and elegant structures that provide cost-effective solutions to cover the large areas without intermediate supports. The topological design of these structures present difficulty due to the fact that the number of joints and members as well as the height of the dome keeps on changing during the design process. This makes it necessary to automate the numbering of joints and members and the computation of the coordinates of joints in the dome. On the other hand the ...
Citation Formats
D. Güner and H. Öztürk, “Creep modelling study of a surface support liner,” 2018, Accessed: 00, 2020. [Online]. Available: