A comprehensive study on the failure mechanisms and integrity of sheath protected rock bolts when subject to axial deformation

Technical report

Mirzaghorbanali, Ali and Nourizadeh, Hadi. 2023. A comprehensive study on the failure mechanisms and integrity of sheath protected rock bolts when subject to axial deformation . Australia. University of Southern Queensland. https://doi.org/10.26192/zx486
Title

A comprehensive study on the failure mechanisms and integrity of sheath protected rock bolts when subject to axial deformation

Report TypeTechnical report
Research Report CategoryIndustry
AuthorsMirzaghorbanali, Ali and Nourizadeh, Hadi
EditorsDiederichs, M.S., Ching, I., Acherya, K., Miller, D., Leong, S. and Lorenza, S.
Institution of OriginUniversity of Southern Queensland
Number of Pages39
Year2023
PublisherUniversity of Southern Queensland
Place of PublicationAustralia
Digital Object Identifier (DOI)https://doi.org/10.26192/zx486
Abstract

This report presents results from five large-scale pull-out tests conducted on CT24 and CT26WR cable bolts encapsulated in Stabilcem T grout, as part of the Snowy Hydro Project 2. The experimental program used double-embedment configurations (900–100 mm and 500–500 mm) to assess elongation, bond degradation, and failure mechanisms under axial loading. Bolts were fully instrumented with strain gauges and LVDTs to monitor stress distribution and joint displacement. Tests were terminated at either bolt failure or when 2.5% system elongation was achieved. Failure modes varied from circumferential grout cracking and sheath slip to full bolt rupture under maximum load. Post-test specimen sectioning confirmed the primary failure interfaces and grout damage patterns. The study enhances understanding of axial deformation behaviour in grouted rock bolts and provides valuable data to inform elongation capacity design, installation practices, and support specification for underground infrastructure.

Keywordsground support performance; Rock bolts; elongation; axial load transfer; double embedment testing; pull-out test; CT24; CT26WR; grout–sheath interface; bond strength; circumferential cracking; strain gauges; Stabilcem T; cable bolt failure; tunnelling support
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020401902. Geomechanics and resources geotechnical engineering
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Byline AffiliationsCentre for Future Materials
School of Engineering
Centre for Future Materials (Research)
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Entezam, Shima, Shokri, Behshad Jodeiri, Ardejani, Shaghayesh Doulati, Mirzaghorbanali, Ali, McDougall, Kevin and Aziz, Naj. 2022. "Predicting the pyrite oxidation process within coal waste piles using multiple linear regression (MLR) and teaching-learning-based optimization (TLBO) algorithm." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2022 Resource Operators Conference (ROC2022). Australia Feb 2022 Australia.
Probabilistic risk assessment of acid mine drainage generation resulted from chalcopyrite oxidation process within Sarcheshmeh copper mine tailings
Entezam, Shima, Shokri, Behshad Jodeiri, Ardejani, Faramarz Doulati, Mirzaghorbanali, Ali, McDougall, Kevin and Aziz, Naj. 2022. "Probabilistic risk assessment of acid mine drainage generation resulted from chalcopyrite oxidation process within Sarcheshmeh copper mine tailings." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2022 Resource Operators Conference (ROC2022). Australia Feb 2022 Australia.
Angle Shear Testing of 15.2 mm Seven Wire Cable Bolt
Aziz, Naj, Mirzaghorbanali, Ali, Anzanpour, Sina, Rastegarmanesh, Ashkan, Khaleghparast, Saman, Nemcik, Jan, Oh, Joung and Si, Guangyao. 2022. "Angle Shear Testing of 15.2 mm Seven Wire Cable Bolt." Rock Mechanics and Rock Engineering. 55 (7), pp. 3919-3937. https://doi.org/10.1007/s00603-022-02847-2
Effect of pretension on the performance of cable bolts and its optimisation in underground coal mines with various geological conditions
Li, Xu, Si, Guangyao, Oh, Joung, Corbett, Peter, O'Sullivan, Terri, Xiang, Zizhuo, Aziz, Naj and Mirzaghorbanali, Ali. 2022. "Effect of pretension on the performance of cable bolts and its optimisation in underground coal mines with various geological conditions." International Journal of Rock Mechanics and Mining Sciences. 152, pp. 1-21. https://doi.org/10.1016/j.ijrmms.2022.105076
Fracture propagation mode of coal under indirect tensile stresses
Serati, Mehdi, Roshan, Hamid, Mirzaghorbanali, Ali, Mahmoud, Mutaz El-Amin and Thejaswee, Valluru. 2021. "Fracture propagation mode of coal under indirect tensile stresses." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Strength properties of grout for strata reinforcement
Majoor, Dean, Mirzaghorbanali, Ali and Aziz, Naj. 2017. "Strength properties of grout for strata reinforcement." Aziz, Naj and Kinnemonth, Bob (ed.) 2017 Coal Operators' Conference. Wollongong, Australia 08 - 10 Feb 2017 Wollongong, Australia.
The extent of shearing and the integrity of protective sleeve coating of cable bolts
Aziz, Naj, Mirzaghorbanali, Ali and Holden, Matthew. 2017. "The extent of shearing and the integrity of protective sleeve coating of cable bolts." Aziz, Naj and Kinnemonth, Bob (ed.) 2017 Coal Operators' Conference. Wollongong, Australia 08 - 10 Feb 2017 Wollongong, Australia.
Axial Performance of Cementitious Grouted Cable Bolts Under Rotation Constraint Scenarios
Rastegarmanesh, Ashkan, Mirzaghorbanali, Ali, McDougall, Kevin, Aziz, Naj, Anzanpour, Sina, Nourizadeh, Hadi and Moosavi, Mahdi. 2022. "Axial Performance of Cementitious Grouted Cable Bolts Under Rotation Constraint Scenarios." Rock Mechanics and Rock Engineering. 55 (9), pp. 5773-5788. https://doi.org/10.1007/s00603-022-02950-4
Proceedings of the 2022 Resource Operators Conference
Aziz, Naj and Mirzaghorbanali, Ali. Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2022. Proceedings of the 2022 Resource Operators Conference. Wollongong, Australia. University of Wollongong.
Numerical simulation of influence parameters on induced stresses distribution during first weighting process of longwall mining
Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza and Mirzaghorbanali, Ali. 2022. "Numerical simulation of influence parameters on induced stresses distribution during first weighting process of longwall mining." Iranian Journal of Mining Engineering. 16 (53), pp. 1-16. https://doi.org/10.22034/ijme.2021.115543.1757
Axial behaviour of rock bolts - Part (B) Numerical study
Nourizadeh, Hadi, Mirzaghorbanali, Ali, McDougall, Kevin, Aziz, Naj and Serati, Mehdi. 2021. "Axial behaviour of rock bolts - Part (B) Numerical study." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Axial behaviour of rock bolts - Part (A) Experimental study
Nourizadeh, Hadi, Williams, Sally, Mirzaghorbanali, Ali, McDougall, Kevin, Aziz, Naj and Serati, Mehdi. 2021. "Axial behaviour of rock bolts - Part (A) Experimental study." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Introduction to new methods of static and dynamic pull testing of rock bolts and cable bolts
Anzanpour, Sina, Aziz, Naj, Nemcik, Jan, Mirzaghorbanali, Ali, Wallace, Jordan, Marshall, Travis and Khaleghparast, Saman. 2021. "Introduction to new methods of static and dynamic pull testing of rock bolts and cable bolts." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Application of Monte Carlo simulation to quantify uncertainties of first weighting interval estimation
Mohammadi, Sadjad, Ataei, Mohammad, Mirzaghorbanali, Ali and Aziz, Naj. 2021. "Application of Monte Carlo simulation to quantify uncertainties of first weighting interval estimation." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Pretension effect on the performance of cable bolts in underground coal mines
Li, Xu, Si, Guangyao, Oh, Joung, Xiang, Zizhuo, Aziz, Naj and Mirzaghorbanali, Ali. 2021. "Pretension effect on the performance of cable bolts in underground coal mines." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Effect of surface profile on axial load transfer mechanism of tendons
Rastegarmanesh, Ashkan, Misa, Joel, Mirzaghorbanali, Ali, Aziz, Naj and McDougall, Kevin. 2021. "Effect of surface profile on axial load transfer mechanism of tendons." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australia.
Angled shear testing of 15.2 mm seven wire cable bolt
Aziz, Naj, Anzanpour, Sina, Khaleghparast, Saman, Rastegarmanesh, Ashkan, Mirzaghorbanali, Ali, Remmenikov, Alex, Nemcik, Jan, Oh, Joung and Si, Guangyao. 2021. "Angled shear testing of 15.2 mm seven wire cable bolt." Aziz, Naj and Mirzaghorbanali, Ali (ed.) 2021 Resource Operators Conference (ROC2021). Springfield, Australia 10 - 12 Feb 2021 Australa.
Proceedings of the 2021 Resource Operators Conference
Aziz, Naj and Mirzaghorbanali, Ali. Aziz, Naj and Kininmonth, Bob (ed.) 2021. Proceedings of the 2021 Resource Operators Conference. Wollongong, Australia. University of Wollongong.
Static and dynamic testing of tendons
Aziz, Naj, Khaleghparast, Saman, Anzanpour, Sina, Remennikov, Alex and Mirzaghorbanali, Ali. 2020. "Static and dynamic testing of tendons." Rasskazov, Igor and Tkach, Sergei (ed.) VIII International Scientific Conference “Problems of Complex Development of Georesources” (PCDG 2020). Khabarovsk, Russian Federation 08 - 10 Sep 2020 France. https://doi.org/10.1051/e3sconf/202019201005
ACARP PROJECT C27040: Development of a Numerical Modelling Approach to Better Understand the Effect of Cable Bolt Performance on Roof Failure Mechanisms in Varying Rock Mass Conditions
Si, Guangyao, Oh, Joung, Hagan, Paul, Li, Xu, Mirzaghorbanali, Ali, Rastegarmanesh, Ashkan, Aziz, Naj, Anzanpour, Sina and Khaleghparast, Saman. 2021. ACARP PROJECT C27040: Development of a Numerical Modelling Approach to Better Understand the Effect of Cable Bolt Performance on Roof Failure Mechanisms in Varying Rock Mass Conditions. Australia. Australian Coal Association Research Program (ACARP).
Comparison of the shear test results of a cable bolt on three laboratory test apparatuses
Li, Xuwei, Aziz, Naj, Mirzaghorbanali, Ali and Nemcik, Jan. 2017. "Comparison of the shear test results of a cable bolt on three laboratory test apparatuses." Tunnelling and Underground Space Technology. 61, pp. 82-89. https://doi.org/10.1016/j.tust.2016.10.003
A Probabilistic Model to Determine Main Caving Span by Evaluating Cavability of Immediate Roof Strata in Longwall Mining
Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza, Mirzaghorbanali, Ali and Aziz, Naj. 2021. "A Probabilistic Model to Determine Main Caving Span by Evaluating Cavability of Immediate Roof Strata in Longwall Mining." Geotechnical and Geological Engineering: an international journal. 39 (3), pp. 2221-2237. https://doi.org/10.1007/s10706-020-01620-y
Static and dynamic testing of tendons
Khaleghparast, Saman, Anzanpour, Sina, Aziz, Naj, Remennikov, Alex and Mirzaghorbanali, Ali. 2020. "Static and dynamic testing of tendons." Aziz, Naj and Kininmonth, Bob (ed.) 2020 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
A review of overburden fracturing and changes in hydraulic characteristics due to longwall mining
Nourizadeh, Hadi, Canbulat, Ismet, Oh, Joung, Zhang, Chengguo, Aziz, Naj, Mirzaghorbanali, Ali and McDougall, Kevin. 2020. "A review of overburden fracturing and changes in hydraulic characteristics due to longwall mining." Aziz, Naj and Kininmonth, Bob (ed.) 2020 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
Shear strength properties of artificial rock joints
Zohaib, Muhammad, Mirzaghorbanali, Ali, Helwig, Andreas, Aziz, Naj, Gregor, Peter, Rastegarmanesh, Ashkan and McDougall, Kevin. 2020. "Shear strength properties of artificial rock joints." Aziz, Naj and Kininmonth, Bob (ed.) 2020 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
A roof cavability classification system and its use for estimation of main caving interval in longwall mining
Mohammadi, Sodjad, Ataei, Mohammad, Kakaie, Reza, Mirzaghorbanali, Ali, Faraji Rad, Zahra and Aziz, Naj. 2020. "A roof cavability classification system and its use for estimation of main caving interval in longwall mining." Aziz, Naj and Kininmonth, Bob (ed.) 2020 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
Numerical exploration of performance of cable bolts in shear loading
Rasekh, Haleh, Aziz, Naj, Nemcik, Jan and Mirzaghorbanali, Ali. 2019. "Numerical exploration of performance of cable bolts in shear loading." 4th Australasian Conference on Computational Mechanics (ACCM-4). Hobart, Australia 27 - 29 Nov 2019 Australia.
A new Roof Strata Cavability Index (RSCi) for longwall mining incorporating new rating system
Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza and Mirzaghorbanali, Ali. 2019. "A new Roof Strata Cavability Index (RSCi) for longwall mining incorporating new rating system." Geotechnical and Geological Engineering: an international journal. 37 (5), pp. 3619-3636. https://doi.org/10.1007/s10706-019-00857-6
Numerical simulation of stress distribution in longwall panels during the first caving interval
Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza, Mirzaghorbanali, Ali, Aziz, Naj and Rastegarmanesh, Ashkan. 2019. "Numerical simulation of stress distribution in longwall panels during the first caving interval." Aziz, Naj and Kininmonth, Bob (ed.) 2019 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
Strength properties of grout for strata reinforcement
Mirzaghorbanali, Ali, Gregor, Peter, Ebrahim, Zeinab, Alfahed, Abdullah, Aziz, Naj and McDougall, Kevin. 2019. "Strength properties of grout for strata reinforcement." Aziz, Naj and Kininmonth, Bob (ed.) 2019 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
Shear strength of rock joints under constant normal loading conditions
Mirzaghorbanali, Ali, Alenzi, Faizal, Gregor, Peter, Aziz, Naj and McDougall, Kevin. 2019. "Shear strength of rock joints under constant normal loading conditions." Aziz, Naj and Kininmonth, Bob (ed.) 2019 Coal Operators' Conference. Wollongong, Australia 18 - 20 Feb 2019 Wollongong, Australia.
Modelling of rebar and cable bolt behaviour in tension/shear
Li, Xuwei, Nemcik, Jan, Aziz, Naj, Mirzaghorbanali, Ali and Rasekh, Haleh. 2015. "Modelling of rebar and cable bolt behaviour in tension/shear." Aziz, Naj and Kininmonth, Bob (ed.) 2015 Coal Operators' Conference. Wollongong, Australia 11 - 13 Feb 2015 Australia.
Effect of air column in transport canisters on measured gas contents of coal
Aziz, N. and Mirzaghorbanali, A.. 2017. "Effect of air column in transport canisters on measured gas contents of coal." Journal of Mining and Environment. 8 (1), pp. 1-9. https://doi.org/10.22044/jme.2016.631
A study on the shear behaviour of infilled rock joints under cyclic loading and constant normal stiffness conditions
Mirzaghorbanali, Ali, Nemcik, Jan and Aziz, Naj. 2014. "A study on the shear behaviour of infilled rock joints under cyclic loading and constant normal stiffness conditions." Aziz, Naj (ed.) 2014 Coal Operators' Conference. Wollongong, Australia 12 - 14 Feb 2014 Wollongong, Australia.
Suggested methods for the preparation and testing of various properties of resins and grouts
Aziz, Naj, Nemcik, Jan, Mirzaghorbanali, Ali, Foldi, Stephen, Joyce, David, Moslemi, Arash, Ghojavand, Hooman, Ma, Shuqi, Li, Xuwei and Rasekh, Haleh. 2014. "Suggested methods for the preparation and testing of various properties of resins and grouts." Aziz, Naj (ed.) 2014 Coal Operators' Conference. Wollongong, Australia 12 - 14 Feb 2014 Wollongong, Australia.
Single shear testing of various cable bolts used in Australian mines
Aziz, Naj, Rink, Owen, Rasekh, Haleh, Hawkins, Ellie, Mirzaghorbanali, Ali, Yang, Guanyu, Khaleghparast, Saman, Mills, Kenneth, Nemcik, Jan and Li, Xuwei. 2017. "Single shear testing of various cable bolts used in Australian mines." Aziz, Naj and Kininmonth, Bob (ed.) 2017 Coal Operators' Conference. Wollongong, Australia 08 - 10 Feb 2017 Wollongong, Australia.
Behaviour of cable bolts in shear; experimental study and mathematical modelling
Aziz, Naj, Craig, Peter, Mirzaghorbanali, Ali, Rasekh, Haleh, Nemcik, Jan and Li, Xuwei. 2015. "Behaviour of cable bolts in shear; experimental study and mathematical modelling." Aziz, Naj and Kininmonth, Bob (ed.) 2015 Coal Operators' Conference. Wollongong, Australia 11 - 13 Feb 2015 Wollongong, Australia.
Strength characteristics of Secura Hollow Groutable Cable Bolts
Aziz, Naj, Hawker, Robert, Mirzaghorbanali, Ali, Nemcik, Jan, Li, Xuwei and Rasekh, Haleh. 2015. "Strength characteristics of Secura Hollow Groutable Cable Bolts." Aziz, Naj and Kininmonth, Bob (ed.) 2015 Coal Operators' Conference. Wollongong, Australia 11 - 13 Feb 2015 Wollongong, Australia.
Strength properties of fibre glass dowels used for strata reinforcement in coal mines
Gilbert, David, Mirzaghorbanali, Ali, Li, Xuwei, Rasekh, Haleh, Aziz, Naj and Nemcik, Jan. 2015. "Strength properties of fibre glass dowels used for strata reinforcement in coal mines." Aziz, Naj and Kininmonth, Bob (ed.) 2015 Coal Operators' Conference. Wollongong, Australia 11 - 13 Feb 2015 Wollongong, Australia.
An experimental study on the contact surface area of cabled bolted strata
Rasekh, Haleh, Aziz, Naj, Nemcik, Jan, Mirzaghorbanali, Ali and Li, Xuwei. 2015. "An experimental study on the contact surface area of cabled bolted strata." Aziz, Naj and Kininmonth, Bob (ed.) 2015 Coal Operators' Conference. Wollongong, Australia 11 - 13 Feb 2015 Wollongong, Australia.
Numerical investigation of the shear behaviour of a cable bolt in single shear test
Li, Xuwei, Yang, Guanyu, Nemcik, Jan, Mirzaghorbanali, Ali and Aziz, Naj. 2019. "Numerical investigation of the shear behaviour of a cable bolt in single shear test." Tunnelling and Underground Space Technology. 84, pp. 227-236. https://doi.org/10.1016/j.tust.2018.11.016
Mechanical behaviours of grout for strata reinforcement
Mirzaghorbanali, Ali, Gregor, Peter, Alkandari, Hamed, Aziz, Naj and McDougall, Kevin. 2018. "Mechanical behaviours of grout for strata reinforcement." Aziz, Naj and Kininmonth, Bob (ed.) 2018 Coal Operators' Conference. Wollongong, Australia 07 - 09 Feb 2018 Wollongong, Australia.
Estimation of the first roof weighting interval incorporating roof strata cavability concept
Mohammadi, Sadjad, Ataei, Mohammad, Kakaie, Reza and Mirzaghorbanali, Ali. 2019. "Estimation of the first roof weighting interval incorporating roof strata cavability concept ." Iranian Journal of Mining Engineering. 14 (73). https://doi.org/10.22034/ijme.2019.36639
Innovative approach to strata reinforcement in coal mines with reference to evaluation cable bolts shear strength
Aziz, N., Mirzaghorbanali, A., Yang, G., Khaleghparast, S. and Rasekh, H.. 2018. "Innovative approach to strata reinforcement in coal mines with reference to evaluation cable bolts shear strength." Journal of Mining and Environment. 9 (3), pp. 703-715. https://doi.org/10.22044/jme.2018.6918.1525
Prediction of the main caving span in longwall mining using fuzzy MCDM technique and statistical method
Mohammadi, S., Ataei, M., Khaloo Kakaie, R. and Mirzaghorbanali, A.. 2018. "Prediction of the main caving span in longwall mining using fuzzy MCDM technique and statistical method." Journal of Mining and Environment. 9 (3), pp. 717-726. https://doi.org/10.22044/jme.2018.6715.1492
The effects of installation procedure on bond characteristics of fully grouted rock bolts
Ma, Shuji, Aziz, Naj, Nemcik, Jan and Mirzaghorbanali, Ali. 2017. "The effects of installation procedure on bond characteristics of fully grouted rock bolts." Geotechnical Testing Journal. 40 (5), pp. 846-857. https://doi.org/10.1520/GTJ20160239
Simulation of macerals effects on methane emission during gas drainage in coal mines
Taheri, Adel, Sereshki, Farhang, Ardejani, Faramarz Doulati and Mirzaghorbanali, Ali. 2017. "Simulation of macerals effects on methane emission during gas drainage in coal mines." Fuel: the science and technology of fuel and energy. 210, pp. 659-665. https://doi.org/10.1016/j.fuel.2017.08.081
Shear strength properties of cable bolts using a new double shear instrument, experimental study, and numerical simulation
Mirzaghorbanali, Ali, Rasekh, Haleh, Aziz, Naj, Yang, Guanyu, Khaleghparast, Saman and Nemcik, Jan. 2017. "Shear strength properties of cable bolts using a new double shear instrument, experimental study, and numerical simulation." Tunnelling and Underground Space Technology. 70, pp. 240-253. https://doi.org/10.1016/j.tust.2017.07.018
An experimental study on the shear performance of fully encapsulated cable bolts in single shear test
Aziz, Naj, Rasekh, Haleh, Mirzaghorbanali, Ali, Yang, Guanyu, Khaleghparast, Saman and Nemcik, Jan. 2018. "An experimental study on the shear performance of fully encapsulated cable bolts in single shear test." Rock Mechanics and Rock Engineering. 51 (7), pp. 2207-2221. https://doi.org/10.1007/s00603-018-1450-0
Effects of cyclic loading on the shear behaviour of infilled rock joints under constant normal stiffness conditions
Mirzaghorbanali, Ali, Nemcik, Jan and Aziz, Naj. 2014. "Effects of cyclic loading on the shear behaviour of infilled rock joints under constant normal stiffness conditions." Rock Mechanics and Rock Engineering. 47 (4), pp. 1373-1391. https://doi.org/10.1007/s00603-013-0452-1
Shear strength properties of plain and spirally profiled cable bolts
Aziz, Naj, Mirzaghorbanali, Ali, Nemcik, Jan, Heeman, Kay and Mayer, Stefan. 2015. "Shear strength properties of plain and spirally profiled cable bolts." Canadian Geotechnical Journal. 52 (10), pp. 1490-1495. https://doi.org/10.1139/cgj-2014-0504
ACARP PROJECT C42012: Shear testing of the major Australian cable bolts under different pretension loads
Aziz, Naj, Mirzaghorbanali, Ali, Nemcik, Jan, Hadi, Muhammad and Remennikov, Alex. 2017. ACARP PROJECT C42012: Shear testing of the major Australian cable bolts under different pretension loads. Australia. Australian Coal Association Research Program (ACARP).
Double shear testing of cable bolts with no concrete face contacts
Rasekh, Haleh, Aziz, Naj, Mirzaghorbanali, Ali, Nemcik, Jan, Li, Xuwei, Yang, Guanyu and Khaleghparast, Saman. 2017. "Double shear testing of cable bolts with no concrete face contacts." Procedia Engineering. 191, pp. 1169-1177. https://doi.org/10.1016/j.proeng.2017.05.292
Strength properties of grout for strata reinforcement
Aziz, Naj, Majoor, Dean and Mirzaghorbanali, Ali. 2017. "Strength properties of grout for strata reinforcement." Procedia Engineering. 191, pp. 1178-1184. https://doi.org/10.1016/j.proeng.2017.05.293
A new equation for the shear strength of cable bolts incorporating the energy balance theory
Rasekh, Haleh, Mirzaghorbanali, Ali, Nemcik, Jan, 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: an international journal. 35 (4), pp. 1529-1548. https://doi.org/10.1007/s10706-017-0191-2
Analytical model of shear behaviour of a fully grouted cable bolt subjected to shearing
Li, Xuwei, Nemcik, Jan, Mirzaghorbanali, Ali, Aziz, Naj and Rasekh, Haleh. 2015. "Analytical model of shear behaviour of a fully grouted cable bolt subjected to shearing." International Journal of Rock Mechanics and Mining Sciences. 80, pp. 31-39. https://doi.org/10.1016/j.ijrmms.2015.09.005
Mechanical properties of grouts at various curing times
Mirza, Ali, Aziz, Naj, Ye, Wang and Nemcik, Jan. 2016. "Mechanical properties of grouts at various curing times." Aziz, Naj and Kininmonth, Bob (ed.) 2016 Coal Operators' Conference. Wollongong, Australia 10 - 12 Feb 2016 Wollongong, Australia.
Modelling simulation of the performance of cable bolts in shear
Rasekh, Haleh, Mirza, Ali, Aziz, Naj, Nemcik, Jan and Li, Xuwei. 2016. "Modelling simulation of the performance of cable bolts in shear." Aziz, Naj and Kininmonth, Bob (ed.) 2016 Coal Operators' Conference. Wollongong, Australia 10 - 12 Feb 2016 Wollongong, Australia.
An elasto-plastic constitutive model for rock joints under cyclic loading and constant normal stiffness conditions
Nemcik, Jan, Mirzaghorbanali, Ali and Aziz, Naj. 2014. "An elasto-plastic constitutive model for rock joints under cyclic loading and constant normal stiffness conditions." Geotechnical and Geological Engineering: an international journal. 32 (2), pp. 321-335. https://doi.org/10.1007/s10706-013-9716-5
Effects of shear rate on cyclic loading shear behaviour of rock joints under constant normal stiffness conditions
Mirzaghorbanali, Ali, Nemcik, Jan and Aziz, Naj. 2014. "Effects of shear rate on cyclic loading shear behaviour of rock joints under constant normal stiffness conditions." Rock Mechanics and Rock Engineering. 47 (5), pp. 1931-1938. https://doi.org/10.1007/s00603-013-0453-0
A follow up to study the behaviour of cable bolts in shear: experimental study and mathematical modelling
Aziz, Naj, Mirza, Ali, Nemcik, Jan, Rasekh, Haleh and Li, Xuwei. 2016. "A follow up to study the behaviour of cable bolts in shear: experimental study and mathematical modelling." Aziz, Naj and Kininmonth, Bob (ed.) 2016 Coal Operators' Conference. Wollongong, Australia 10 - 12 Feb 2016 Wollongong, Australia.
Load transfer characteristics of plain and spiral cable bolts tested in new non rotating pull testing apparatus
Aziz, Naj, Mirza, Ali, Nemcik, Jan, Li, Xuwei, Rasekh, Haleh and Wang, Gaofeng. 2016. "Load transfer characteristics of plain and spiral cable bolts tested in new non rotating pull testing apparatus." Aziz, Naj and Kininmonth, Bob (ed.) 2016 Coal Operators' Conference. Wollongong, Australia 10 - 12 Feb 2016 Wollongong, Australia.
Numerical modeling of gas flow in coal pores for methane drainage
Taheri, Adel, Sereshki, Farhang, Ardejani, Faramarz Doulati and Mirzaghorbanali, Ali. 2016. "Numerical modeling of gas flow in coal pores for methane drainage." Journal of Sustainable Mining. 15, pp. 95-99. https://doi.org/10.1016/j.jsm.2016.10.001
Behavior of fiber glass bolts, rock bolts and cable bolts in shear
Li, Xuwei, Aziz, Naj, Mirzaghorbanali, Ali and Nemcik, Jan. 2016. "Behavior of fiber glass bolts, rock bolts and cable bolts in shear." Rock Mechanics and Rock Engineering. 49 (7), pp. 2723-2735. https://doi.org/10.1007/s00603-015-0907-7
Factors influencing the quality of encapsulation in rock bolting
Aziz, Naj, Craig, Peter, Mirzaghorbanali, Ali and Nemcik, Jan. 2016. "Factors influencing the quality of encapsulation in rock bolting." Rock Mechanics and Rock Engineering. 49 (8), pp. 3189-3203. https://doi.org/10.1007/s00603-016-0973-5
An experimental study of axial load transfer mechanisms of cable bolts using axially split embedment apparatus
Mirzaghorbanali, A. and Aziz, N.. 2017. "An experimental study of axial load transfer mechanisms of cable bolts using axially split embedment apparatus." Journal of Mining and Environment. 8 (2), pp. 131-137. https://doi.org/10.22044/jme.2016.732
Effects of shearing direction on shear behaviour of rock joints
Mirzaghorbanali, Ali, Rasekh, Haleh, Aziz, Naj and Nemcik, Jan. 2014. "Effects of shearing direction on shear behaviour of rock joints." Aziz, Naj (ed.) 2014 Coal Operators' Conference. Wollongong, Australia 12 - 14 Feb 2014 Australia.
ACARPC21011: Development Of New Testing Procedure For The Assessment Of Resin Performance For Improved Encapsulated Roof Bolt Installation In Coal Mines
Aziz, Naj, Nemcik, Jan, Craig, Peter, Hawker, Robert, Devenish, Colin, Mirza, Ali, Moslemi, Arash, Ghojavand, Hooman, Bedford, Mark, Gaudry, Tim and Joyce, David. 2014. ACARPC21011: Development Of New Testing Procedure For The Assessment Of Resin Performance For Improved Encapsulated Roof Bolt Installation In Coal Mines . Australia. Australian Coal Association Research Program (ACARP).
The Strength Properties of Fibreglass and Other Polymer-based Dowels for Strata Reinforcement in Coalmines
Aziz, N, Gilbert, D, Nemcik, J, Mirzaghorbanali, A and Burton, R. 2014. "The Strength Properties of Fibreglass and Other Polymer-based Dowels for Strata Reinforcement in Coalmines." 3rd Australasian Ground Control in Mining Conference (AusRock 2014). Sydney, Australia 05 - 06 Nov 2014 Australia.
Shear behaviour of rock joints under cyclic loading and constant normal stiffness conditions
Mirzaghorbanali, Ali. 2013. Shear behaviour of rock joints under cyclic loading and constant normal stiffness conditions. PhD Thesis Doctor of Philosophy. University of Wollongong.
Numerical modelling of cyclic shear behaviour of rock joints under constant normal stiffness condition
Mirzaghorbanali, Ali and Nemcik, Jan. 2013. "Numerical modelling of cyclic shear behaviour of rock joints under constant normal stiffness condition." Aziz, Naj, Kininmonth, Bob, Nemcik, Jan, Ren, Ting and Hoelle, John (ed.) 2013 Coal Operators' Conference. Wollongong, Australia 14 - 15 Feb 2013 Australia.
Shear behaviour of rock joints under cyclic loading
Indraratna, Buddhima, Mirzaghorbanali, Ali, Oliveira, David and Premadasa, Wuditha N.. 2012. "Shear behaviour of rock joints under cyclic loading." 11th Australia New Zealand Conference on Geomechanics: Ground Engineering in a Changing World. Melbourne, Australia 15 - 18 Jul 2012 Australia.