Paul C. Hagan
University of New South Wales
Coal miningUltimate tensile strengthArchGeologyEngineeringBoreholeComposite materialMining engineeringGeotechnical engineeringMetallurgyMaterials scienceCorrosionShear stressGroutStress corrosion crackingStiffnessEnvironmental scienceDirect shear testRock mass classificationEmbedmentStructural engineeringStress (mechanics)Shear (geology)
117Publications
18H-index
926Citations
Publications 118
Newest
#1Jianhang Chen (CUMT: China University of Mining and Technology)H-Index: 6
Abstract null null Cement grouts are widely used as construction materials in civil engineering and bonding agents in mining engineering. To reveal the influence of the specimen geometry on the axial performance of grouts, a number of Uniaxial Compressive Strength (UCS) tests on four kinds of grouts were executed. The highlight of this paper is that the grout performance was reflected on different aspects, including the UCS, the axial strain where UCS occurred, the elastic modulus, the post-fail...
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#1Peter Craig (UNSW: University of New South Wales)H-Index: 6
#2Hamed Lamei Ramandi (UNSW: University of New South Wales)H-Index: 14
Last. Serkan Saydam (UNSW: University of New South Wales)H-Index: 15
view all 8 authors...
Abstract Premature failure of rockbolts due to stress corrosion cracking (SCC) is an unresolved global issue in underground structures, particularly underground mines. To date, SCC of rockbolts has been produced in laboratory-based studies under laboratory conditions, however no attempt to produce SCC in-situ in actual underground coal mine conditions has previously been made. In this study, an innovative testing methodology was used in which a rockbolt coupon was developed with multiple stresse...
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#1Danqi Li (Monash University)H-Index: 7
#2Yingchun Li (DUT: Dalian University of Technology)H-Index: 13
Last. Serkan Saydam (UNSW: University of New South Wales)H-Index: 15
view all 6 authors...
Abstract Many experimental studies have been carried out to characterise the mechanical performance of cable bolts under axial or shear loading. The common limitation in all these studies is that only single-variate descriptive analysis was included leading to an insufficient understanding of interactive influences of a range of parameters on the mechanical performance of cable bolt. Also, defining a reasonable number of experiments for the testing program that includes wide range of parameters ...
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#1Danqi LiH-Index: 7
#2Hossein MasoumiH-Index: 12
Last. Paul C. Hagan (UNSW: University of New South Wales)H-Index: 18
view all 4 authors...
#1Danqi Li (UNSW: University of New South Wales)H-Index: 7
#2Hossein Masoumi (Monash University)H-Index: 12
Last. Mostafa AsadizadehH-Index: 7
view all 5 authors...
The laboratory short encapsulation pull-out test (LSEPT) has been widely accepted as the most efficient method to characterize the mechanical behaviour of cable bolts under axial loading. In this s...
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#1Saisai Wu (UNSW: University of New South Wales)H-Index: 7
#2Hamed Lamei Ramandi (UNSW: University of New South Wales)H-Index: 14
Last. Serkan Saydam (UNSW: University of New South Wales)H-Index: 15
view all 6 authors...
Abstract Stress corrosion cracking (SCC) of rockbolts and cable bolts in underground mines has been identified as a serious international problem over the past two decades. The frequent occurrence of rockbolt and cable bolt SCC in strata containing clay and groundwater suggests the presence of certain mineral types may be an influencing factor. To identify the environmental factors leading to SCC and evaluate the effects of mineralogically influenced corrosion, a laboratory testing program capab...
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#1L. Li (UNSW: University of New South Wales)H-Index: 3
#2Paul C. Hagan (UNSW: University of New South Wales)H-Index: 18
Last. Chengguo Zhang (UNSW: University of New South Wales)H-Index: 13
view all 5 authors...
Rockbolts are widely used as an underground support element to resist the convergence and maintain the stability of excavations. However, shear failure of rockbolts is increasingly observed in jointed rock mass of underground tunnels, especially after being subjected to seismic events. At present, understanding of the mechanical response of rockbolts subjected to seismic or dynamic loading in shear is still unclear. To investigate the shear performance of rockbolts under dynamic loading conditio...
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#1Danqi Li (Monash University)H-Index: 7
#2Hossein Masoumi (Monash University)H-Index: 12
Last. Paul C. Hagan (UNSW: University of New South Wales)H-Index: 18
view all 4 authors...
#1Danqi Li (UNSW: University of New South Wales)H-Index: 7
#2Hossein Masoumi (Monash University)H-Index: 12
Last. Serkan Saydam (UNSW: University of New South Wales)H-Index: 15
view all 4 authors...
Abstract This study aims to experimentally and analytically investigate the behaviour of two different cable bolts, including Sumo and TG using an advanced pull-out testing facility capable of testing the cable bolts under axial loading and constant normal stiffness. The quantitative contribution of a range of parameters (e.g. uniaxial compressive strengths of grout and confining medium and the borehole diameter) on the overall behaviour of Sumo and TG cable bolts was examined based on Analysis ...
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