Strength properties of fibre glass dowels used for strata reinforcement in coal mines

Gilbert, David and Mirzaghorbanali, Ali ORCID: and Li, Xuwei and Rasekh, Haleh and Aziz, Naj and Nemcik, Jan (2015) Strength properties of fibre glass dowels used for strata reinforcement in coal mines. In: 2015 Coal Operators' Conference, 11-13 Feb 2015, Wollongong, NSW, Australia.


Glass-Reinforced Polymer (GRP) bolts, commonly known as Fibre Glass (FG) dowels are increasingly applied for strata reinforcement in mines. The most popular dowels used in coal mines are the 22 mm diameter fully threaded type. A series of tests were undertaken to evaluate various strength properties of FG dowels. These include tensile failure tests by the double-embedment method, single and double guillotine shear tests, double shear tests in concrete medium and punch shear tests. Punch shear tests were used to evaluate the dowel shear strength parallel and perpendicular to the fibre glass strands or elements direction of extrusion. The study found that the tensile strength of the 22 mm diameter fibre glass dowels was in the order of 30 t. In the shear testing, the peak shear load was influence by the encapsulation grout type and the level of fibre glass axial pre-tension. Also, there was a nearly fivefold difference in the shear strength value of fibre glass dowels tested parallel as against perpendicular to the dowel axis.

Statistics for USQ ePrint 36309
Statistics for this ePrint Item
Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: No paper in these proceedings is to be re-published unless with written permission from the conference organisers and/or the original authors who maintain the copyright for their work.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 26 Apr 2019 01:53
Last Modified: 24 Nov 2021 00:06
Uncontrolled Keywords: glass-reinforced polymer bolts; fibre glass dowels; strata reinforcement
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401905 Mining engineering

Actions (login required)

View Item Archive Repository Staff Only