A new equation for the shear strength of cable bolts incorporating the energy balance theory

Rasekh, Haleh and Mirzaghorbanali, Ali and Nemcik, Jan and Aziz, Naj and Li, Xuwei (2017) A new equation for the shear strength of cable bolts incorporating the energy balance theory. Geotechnical and Geological Engineering, 35 (4). pp. 1529-1548. ISSN 0960-3182

Abstract

The application of cable bolts as a secondary support system is an increasing trend in underground coal mines worldwide. The performances of cable bolts have been evaluated under both axial and shear loading conditions. Two methods of
testing cables for shear, single and double shear, have
been recognised. This paper examines the shear behaviour of a variety of cable bolts under different pre-tension loads by double shear testing. Plain, spiral and the combination of both cable types were used in this study. The initial axial load and the type of cable bolts are the main factors affecting their shear strength. By increasing the axial pre-tension load, the peak shear load occurs at lower shear displacement. The failure angle due to cable bending across the joint at different pre-tension loads varied between 41
and 49. This demonstrates that the ratio of axial and
perpendicular displacements is almost constant and on average the failure occurs at about 45. A novel
analytical model is proposed to evaluate the shear behaviour of pre-tensioned fully grouted cable bolts subjected to double shearing. Energy and Fourier Series methods were incorporated in the model to simulate the shear behaviour of cable bolts. The comparison of the experimental results with the proposed model shows a good agreement.


Statistics for USQ ePrint 32611
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 09 Nov 2017 00:12
Last Modified: 09 Nov 2017 00:12
Uncontrolled Keywords: cable bolts; shear behaviour; double shear test; pre-tension; fourier series; energy balance theory
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
09 Engineering > 0905 Civil Engineering > 090599 Civil Engineering not elsewhere classified
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091402 Geomechanics and Resources Geotechnical Engineering
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
Identification Number or DOI: 10.1007/s10706-017-0191-2
URI: http://eprints.usq.edu.au/id/eprint/32611

Actions (login required)

View Item Archive Repository Staff Only