https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Laboratory investigation on high values of restitution coefficients https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:13855 n are below unity. Values greater than one are quite rare, seen as unusual and barely explained. Previous experimental research conducted in Australia has shown consistent and systematic values of the normal restitution coefficient greater than one. This was tentatively explained by a combination of parameters such as low impacting angle, rotational energy and block angularity. The study presented in this paper aims at (1) identifying the critical parameters conducting to high kn values and (2) at explaining the associated motion mechanisms. The objective was reached with values of kn up to almost 2. In addition, the study has confirmed the significance of low impacting angle, rotational energy and block shape in this context.]]> Wed 11 Apr 2018 11:19:49 AEST ]]> Numerical Investigation of the Fragmentation Process in Marble Spheres Upon Dynamic Impact https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:41033 Wed 09 Aug 2023 09:55:26 AEST ]]> An Experimental Setup to Study the Fragmentation of Rocks Upon Impact https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48766 Wed 05 Apr 2023 13:55:37 AEST ]]> A numerical investigation of sinkhole subsidence development over shallow excavations in tectonised weak rocks: the Dolaei tunnel's excavation case https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34613 Wed 03 Apr 2019 15:34:32 AEDT ]]> Rockfall in open pit mines: management of the pit geometry and protection measures design https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54493 Tue 27 Feb 2024 15:11:05 AEDT ]]> A study of factors affecting women’s lived experiences in STEM https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48145 Tue 25 Jul 2023 10:05:09 AEST ]]> A confirmatory study of the relations between workplace sexism, sense of belonging, mental health, and job satisfaction in male-dominated industries https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35159 Tue 23 Jun 2020 15:59:42 AEST ]]> Designing waste rock barriers by advanced numerical modelling https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35832 Tue 10 Dec 2019 16:06:23 AEDT ]]> Full-scale experimental testing of dump-point safety berms in surface mining https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24109 Tue 09 Jul 2019 10:43:22 AEST ]]> Practical considerations for the application of a survival probability model for rockfall https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50133 Tue 04 Jul 2023 13:20:26 AEST ]]> An exploratory study of the relations between women miners' gender-based workplace issues and their mental health and job satisfaction https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31199 Tue 03 Sep 2019 18:27:06 AEST ]]> A novel 3D clumped particle method to simulate the complex mechanical behavior of rock https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37217 Tue 01 Sep 2020 15:17:53 AEST ]]> A Shear Device with Controlled Boundary Conditions for Very Large Nonplanar Rock Discontinuities https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50668 Tue 01 Aug 2023 14:30:44 AEST ]]> On the Dynamic Fragmentation of Rock-Like Spheres: Insights into Fragment Distribution and Energy Partition https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50570 Tue 01 Aug 2023 10:12:04 AEST ]]> Photogrammetric digital surface model reconstruction in extreme low-light environments https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39476 Thu 28 Jul 2022 15:10:21 AEST ]]> A novel and robust contact detection algorithm for arbitrarily shaped blocks https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39330 Thu 28 Jul 2022 11:30:07 AEST ]]> Identifying safety culture and safety climate variables that predict reported risk-taking among Australian coal miners: an exploratory longitudinal study https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35859 Thu 10 Nov 2022 09:31:03 AEDT ]]> Numerical investigation of the strength variability of rock using DEM https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39459 Thu 09 Jun 2022 09:08:28 AEST ]]> Efficient discrete modelling of composite structures for rockfall protection https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31259 Sat 24 Mar 2018 08:44:29 AEDT ]]> Rock fall numerical modelling using a combined finite-discrete element approach https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12074 Sat 24 Mar 2018 08:11:19 AEDT ]]> The characteristics of rock fragments in the basalts of eastern Australia https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:12177 Sat 24 Mar 2018 08:09:17 AEDT ]]> The influence of shape on the inherent rolling potential of loose rocks https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26858 Sat 24 Mar 2018 07:41:45 AEDT ]]> Rockfall hazard analysis from discrete fracture network modelling with finite persistence discontinuities https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25270 Sat 24 Mar 2018 07:38:19 AEDT ]]> Determining the energy absorption capacity of safety berms in surface mining https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26450 Sat 24 Mar 2018 07:27:14 AEDT ]]> Management of rockfall hazards at the base of a highwall https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26451 Sat 24 Mar 2018 07:27:12 AEDT ]]> A new rockfall hazard methodology for open-pit coal mines https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24449 Sat 24 Mar 2018 07:17:22 AEDT ]]> A rapid approach to estimate the rockfall energies and distances at the base of rock cliffs https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24356 Sat 24 Mar 2018 07:10:18 AEDT ]]> Modelling of deformable structures in the general framework of the discrete element method https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:23972 Sat 24 Mar 2018 07:10:05 AEDT ]]> Influence of Block Geometry Configuration on Multi-Image Dense Matching https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44835 Mon 24 Oct 2022 09:52:47 AEDT ]]> Network design and quality checks in automatic orientation of close-range photogrammetric blocks https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20531 Mon 17 Jun 2019 15:07:19 AEST ]]> Numerical investigation of rockfall impacts on muckpiles for underground portals https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30511 Mon 17 Jun 2019 14:59:20 AEST ]]> 3D finite element modelling of chain-link drapery system https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:35212 Mon 15 Jul 2019 15:12:17 AEST ]]> A 3D discrete element modelling approach for rockfall analysis with drapery systems https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:16876 Mon 08 Jul 2019 16:24:28 AEST ]]> Discrete modelling of hexagonal wire meshes with a stochastically distorted contact model https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:16832 Mon 08 Jul 2019 16:17:19 AEST ]]> An experimental and theoretical study of the normal coefficient of restitution for marble spheres https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36792 Mon 06 Jul 2020 11:38:42 AEST ]]> Coastal Cliffs Rockfall Analyses And Mitigation Measures Assessment Using Rocfall3: A Case Study Along Shortland Esplanade In Newcastle, NSW (Australia) https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55392 Fri 24 May 2024 10:40:37 AEST ]]> Use of low-cost terrestrial and aerial imaging sensors for geotechnical applications https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42219 Fri 19 Aug 2022 11:28:21 AEST ]]> Investigating the Impact of an Outreach Intervention on Girls’ STEM Identity Formation https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53060 Fri 17 Nov 2023 11:55:03 AEDT ]]> Bayesian updating on resistance factors of H-Piles with axial load tests https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50881 Fri 11 Aug 2023 15:04:58 AEST ]]> Predicting the fragmentation survival probability of brittle spheres upon impact from statistical distribution of material properties https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39500 m) and the scale parameter (here, the critical kinetic energy). The model is based on theoretically-derived conversion factors used to turn the critical work required to fail disc samples in quasi-static indirect tension into the critical kinetic energy to cause failure of spheres at impact in drop tests. The mechanistic conversion factors specifically account for the shape and size of the specimens tested and the increase of strength under dynamic loading (strain rate effect). Three series of drop tests were conducted (on spheres of three different diameters) and complemented by extensive material characterisation testing in order to validate the novel predictive model. The variability of material properties was characterised, and it was found that the material strength found by the characterisation tests generally follows a Weibull form, but the survival probability distribution of the drop tests seems to be linear. The predicted conversion factors were first compared against their experimental counterparts before validating the prediction of survival probability of the spheres upon dynamic impact (in drop tests). It was found that it is possible to predict the survival probability of artificial rock of three different diameters (50 mm, 75 mm, 100 mm) and two different strengths upon impact solely from the statistical information coming from Brazilian tests and with an average relative error of less than 9%.]]> Fri 10 Jun 2022 14:46:30 AEST ]]> Temporal-spatial frequency rockfall data from open-pit highwalls using a low-cost monitoring system https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:37511 Fri 09 Aug 2024 10:01:20 AEST ]]> Investigation of impingement angle influence on impact wear of different chute liners by employing a novel impact wear tester https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45720 Fri 04 Nov 2022 09:38:03 AEDT ]]>