Abstracts received for AfriRock Symposium 2017 · 30 September –6 October 2017

Keynotes Assessment of the risks in undermining of a surface stream in Rock engineering as a creator of value a shallow coal mine T.R. Stacey, University of the Witwatersrand, South Africa Glencore, South Africa Mythperceptions in rock engineering coal pillar stooping – Partial extraction of coal pillars ensuring N. van der Merwe, Stable Strata, South Africa panel stability Glencore, South Africa Lessons from large failures: geology, stress and support N. Barton, Nick Barton & Associates, Norway coal pillar stooping – Assessing the stability of snooks Glencore, South Africa stress measurements for underground powerhouses – three recent cases the effect on undercutting an unstable layer on roof stability L. Lamas, ISRM Bafokeng Rasimone Platinum Mine, South Africa stability of middling between two tabular chrome seams the Grosvenor strata control journey: learning and adapting Hernic, South Africa from new and challenging experiences P.S. Buddery, Anglo American Met Coal, Australia extraction of hard rock strike pillars Bafokeng Rasimone Platinum Mine, South Africa How rock mechanics can help oil well drilling — Latest developments Investigation of a failure associated with a major shear zone S. Fontoura , Pontifical Catholic University of Rio de Janeiro, Brazil in the Main Pit cut 3 West, at Letšeng Diamond mine Lesotho Letšeng Diamonds, University of Kwazulu Natal, South Africa AbstRActs Rock anchoring beam excavation and shaping technology for Advanced information on rock mass properties in large open the underground powerhouse of Hydropower stations pits by analysing production drill rig parameters in real time China Three Gorges Corporation, China Groundwork Consulting, South Africa Deformation and failure analysis of large underground hard- Rock engineering considerations for the extension of a vertical rock chambers under high geo-stress: A case study of the rectangular shaft in a jointed rockmass adjacent to a large underground powerhouse on the right bank of baihetan open-pit Hydropower station GeoSindile (Pty) Ltd, South Africa China Three Gorges Corporation, China the mineralogical and geotechnical properties of the sandstone ‘parting’ between the Alfred seam and the Gus Research of deformation and failure characteristics, seam in the Magdalena colliery, Dundee mechanism, and engineering countermeasures for South Africa University of KwaZulu-Natal, Buffalo Coal, South Africa surrounding rocks in underground chambers of baihetan Hydropower station Application of controlled blasting to minimize limit wall China Three Gorges Corporation, HydroChina Itasca Research and damage at Letšeng Diamonds Lesotho Development Center, Powerchina Huadong Engineering University of KwaZulu-Natal, South Africa Corporation Limited, China Full-scale dynamic tests of a ground support system using the dam foundation grouting engineering management based high-tensile strength chain link mesh in el teniente Mine, chile on 3D geological model and monitoring system Chile University / Codelco El Teniente, University of Applied China Three Gorges Corporation, China sciences Zurich, Geobrugg AG, Santa María University, Geobrugg Andina Groep T University / Geobrugg Southern Africa (Pty) Ltd, A case study on a risk based approach to stope design Chile, South Africa SRK, South Africa Improving the mining efficiencies as a result of a new support comparison between thin spray on liners and shotcrete as design at Unisel Gold Mine, Welkom, south Africa surface support mechanisms in tunnels Brentley, Lucas & Associates (Pty) Ltd, South Africa University of Cape Town, South Africa Rockburst prevention due to destress blasting in roof time dependent failure of open stopes at target Mine competent rocks in hardcoal longwall mining Brentley, Lucas and Associates, South Africa Institute of Geonics of the Czech Academy of Sciences, Czech Reassessing continuous stope closure data using a limit Republic equilibrium displacement discontinuity model optimizing stoping panel spans at an eastern bushveld University of Pretoria, South Africa platinum mine Geomechanical evaluation enabled successful stimulation of Impala Platinum, South Africa apollonia tight chalk reservoir in Abu-Gharadig basin, egypt Pillar scaling and pillar fracturing in deep level gold mines in Khalda Petroleum Company, Egypt south Africa 1Deep level gold mine techniques for three-dimensional displacement vector using The University of the Witwatersrand, South Africa ground-based interferometric synthetic aperture radar Remediation of abandoned mines for residential development Hexagon Mining, South Africa, IDS GeoRadar, Italy Oweis Engineering Inc, The Falcon Group, USA slope design aspects considerations for shallow open pit A model-oriented, remote sensing approach for the derivation mines: A case study at Mamatwan Mine, northern cape of numerical modelling input data: Insights from the Hope Province slide, canada University of Johannesburg, South Africa Simon Fraser University, Canada Abstracts received for AfriRock Symposium 2017 · 30 September –6 October 2017

A study of multi-reef pillar extraction in the carletonville area A critical review of the findings from in situ stress SibanyeGold, The University of the Witwatersrand, South Africa measurements conducted in southern Africa during the past ten years Parameters required for the design of rock support in highly Hands on Mining cc, Groundwork Consulting, South Africa stressed rock masses Norwegian University of Science and Technology, Norway study of innovative technologies for underground excavations monitoring during construction and operation phases A tool for the evaluation of departmental effectiveness University of Parma, Italy Advisian, South Africa simultaneous extraction of three coal seams with stowing – A Fundamentals of underground pillar design case study Middindi Consulting (Pty) Ltd, University of Pretoria, South Africa CSIR-Central Institute of Mining & Fuel Research, India An empirical and numerical approach to quantifying raise-bore Preliminary investigation to areal shape effect of pillar strength hole stability University of Pretoria, South Africa Middindi Consulting (Pty) Ltd, South Africa Development of a site specific floor deformation index to Microseismic events for slope stability analysis – A case study assess floor heave risks at an open pit mine Anglo American Met Coal, Anglo American Grosvenor Mine, CSIRO Energy, Australia Australia Modelling hydraulic fracturing in hard rock using a characterization and numerical modelling of standard and continuous-discontinuous method cabled strapped pillars in a hematite mine Chinese Academy of Sciences, China University of Vigo, Spain Mining with crush pillars Application of rock mass classification and blastability index Lonmin Platinum, University of Pretoria, South Africa for the improvement of wall control in hard rock open pit Unravelling the structural mysteries of the bermuda triangle at mining: a case study Lonmin’s saffy shaft Lonmin Plc The University of the Witwatersrand, South Africa Terra Explora Consulting, South Africa comparison of observational, empirical and 3D discrete Understanding the influence of geological structures – an numerical methods to estimate subsidence over longwall coal often overlooked important aspect in the stability of operating faces mines University of Vigo, Itasca Consultores SL, Spain Independent Consultant, Lonmin Platinum, Canada, South Africa A multi-objective hybrid prediction model of slope deformation crack propagation energy determination for rock materials based on fuzzy optimization algorithm under static and impact loading Yangtze River Scientific Research Institute, China Karadeniz Technical University, Turkey numerical simulation of fully grouted rock bolts by cautious balst design and practice in close proximity to a considering the non-linear bond-slip behaviour railway tunnel and apartment buildings Nanyang Technological University, Singapore Middle East Technical University, Turkey otjikoto gold mine – a case study on the pit slope design SRK, South Africa evaluation of crack displacement in underground excavations using wireless technology crack meters the effect of seismic sensor frequency on the results of University of the Witwatersrand, South Africa routine seismic monitoring analyses techniques Australian Centre for Geomechanics, Australia stable beam span re-design and support optimization for a shallow hard rock bord and pillar mine: the case of Unki mine, Microseismicity characteristic and rockburst risk mitigation Zimbabwe during the breakthrough in deep-buried tunnels of the Jinping- Unki mines (Pvt) Ltd, Zimbabwe II Hydropower station, china Chinese Academy of Sciences, China excavation-induced seismicity: mechanism and implications Nanyang Technological University, Tsinghua University, China A holistic open-pit mine slope stability index using Artificial neural networks the impacts of plastic deformation on productivity in low- University of Johannesburg, South Africa permeability reservoirs during hydraulic fracturing Petro-Geotech Inc., Canada An investigation on the relationships between the petrographic, physical and mechanical characteristics of two phase flow coupled to geomechanics by dual porosity sandstones from newspaper Member of the natal Group model: simulating fractured reservoirs by finite element University of KwaZulu University of Johannesburg, South Africa method Petro-Geotech Inc., Canada the significance of identifying potential failure mechanisms from conceptual to design level for open pit rock slopes Relating source mechanisms to damage phenomena in University of KwaZulu, University of Johannesburg, South Africa platinum mines of the western bushveld complex Yuba, South Africa support method of hard rock in underground engineering with high geo-stress: A case study of the baihetan underground numerical simulation of a segmental lining and rock mass cavern, china interaction Chinese Academy of Sciences, China Graz University of Technology, Austria Abstracts received for AfriRock Symposium 2017 · 30 September –6 October 2017

A numerical study of the influence of pre-existing Review of remnant mining practices in south African Gold discontinuities on the hydraulic fracturing process Mines Amirkabir University of Technology, Iran University of the Witwatersrand, South Africa continuum modelling of the behaviour of high rock slopes Geotechnical data for Ivanplats Amirkabir University of Technology, Iran Platreef project Ivanplats (Pty) Ltd, SRK Consulting (Pty) Ltd, South Performance evaluation of the Paboase crown pillar at chirano Africa gold mines in Ghana Kinross Geological- and hydrogeological settings for rock engineering Chirano Gold Mines Ltd, Ghana an example for grouting design at Äspö Hard Rock Laboratory, supercritical co 2 fracturing on shale under true triaxial stress sweden conditions Chalmers University of Technology, Norconsult AB, Sweden Northeastern University, Chinese Academy of Sciences, China Acoustic approach to estimation of rock mass state and ‘early access’ microseismic monitoring using sensors prediction of induced seismicity parameters: theory, laboratory installed in long boreholes experiment and case study Sudbury Integrated Nickel Operations, A Glencore Company, Russian Academy of Science, Russia Engineering Seismology Group (ESG), Canada Inc., Canada Issues related to the long-term stability of unlined water optimizing presplit performance in highly jointed rock tunnels – a case review formations Norwegian University of Science and Technology (NTNU), Norway Curtin University-Western Australian School of Mines, Australia the sub-surface profiler: A giant leap for ground penetrating Revised pillar design for a Zimbabwe bord and pillar operation radar - using a combination of empirical, linear elastic and non-linear REUTECH Mining, South Africa analysis SRK Consulting (Pty) Ltd, South Africa borehole stability and sand production in gas reservoirs Aristotle University of Thessalonik, SINTEF, Petroleum Research, sand management and cHoPs with thermally effects Greece, Norway Petro-Geotech Inc., South Africa Design of weathered slopes to improve stability and Hydraulic fracturing initiation and the induced stresses near a economics horizontal well in a thermo-poroelastic medium: Model and Kansanshi Mine, Zambia applications to enhanced geothermal system Petro-Geotech Inc., South Africa Rock failure modes under uniaxial compression and indirect tension Modelling salt rock dissolution in the foundation of a large Indian Institute of Technology Kharagpur, India dam Tractebel France, Gennevilliers, Independent Consultant, France, experimental studies of variably saturated flow from a Belgium horizontal discontinuity to the vertical with and without an intersection stability of large underground rock caverns for crude oil University of Pretoria, 2GaGE Consulting, South Africa storage operated below atmospheric pressure Geostock Entrepose, France characterizing microtremor signals of a slope with deep- seated gravitational deformation Discrete element modelling of rock cutting experiments under National Taipei University of Technology, Taiwan confining pressure University of Mons, Belgium Influence of scale on fluid flow through fractured rock masses controlled damage - unfolding the design, risk and cost BGTech Soil and Rock Engineering, Votorantim Metais, Brazil AEL, South Africa benchmarking of debris flow experimental tests using support design for tunnels with large overburden in weak rock combined finite-discrete element method, FeMDeM Graz University of Technology, Austria University of Turin, Imperial College of London, Italy, London numerical modelling of the shallow crystal stress field in Reducing the risk to a mining project through timely and chinese mainland with the constraint of in situ measured appropriate geotechnical data collection stress First Quantum Minerals Limited, Zambia China Earthquake Administration, China Influence of heterogeneity at grain-scale on rockburst Use of plastic composites as friction rock bolt materials proneness Investigations on artificial samples Karadeniz Technical University, Turkey University of Technology, Austria the evaluation of rock bolt as rock support in underground Development of a rocks mass quality model for an open gold mine Pongkor, west Java, Indonesia pit mine Trisakti University, Indonesia Norwegian University of Science and Technology (NTNU), Norway Assessment of closure by timber pack assessment method contributions to geomechanical stope optimization at and its comparison to MAP3D convergence Goldcorp University of the Witwatersrand, South Africa Eleonore Mine Goldcorp, Laval University, Canada Abstracts received for AfriRock Symposium 2017 · 30 September –6 October 2017 numerical simulation of hydraulic fracturing process on Ritsumeikan University, SATREPS, 'Japan, South Africa, composite rock mass Switzerland, Australia, Italy, USA Tongji University, China University of Mining & Technology, China InsAR monitoring for mines: an integrated approach, Failure and debris mechanism of karst caves during drill and 'tRe ALtAMIRA blast tunnelling Optron Pty, Italy Tongji University, China University of Mining & Technology, China technology transfer on minimizing seismic risk in the platinum Microseismic monitoring and stability analysis of deep mines underground powerhouse at the Lianghekou hydropower SiM Mining Consultants (Pty) Ltd, Middindi Consulting (Pty) Ltd, station, southwest china Simulated Training Solutions (Pty) Ltd, South Africa Powerchina Chengdu Engineering Corporation Limited, Sichuan the determination of crustal stress direction based on the University, China borehole geometric shape using panoramic stereopair imaging combining different vehicle LiDAR dates to discuss the technology characteristic of potential geological disaster along Chinese Academy of Sciences, China changchun shrine trail Investigating crack initiation and propagation by rock-like National Taipei University of Technology, China materials numerical modelling of longwall goaf dynamics and properties University of Queensland, Australia for gas drainage design Metolong dam slope stabilization and rock support CSIRO, Australia Gibb Consulting Engineers Pty Ltd, South Africa stability analysis and failure evolution of large-scale ‘Design of stoping sequence at deeper horizons for a Lead- underground caverns in bedded rock masses from Zinc mine in sheared rock mass’ microseismic monitoring Central Institute of Mining and Fuel Research (CIMFR) Regional Sichuan University, Powerchina, Chengdu Engineering Corporation Center, Nagpur, India Limited, China tracking cave shape development with microseismic data Rock engineering for boschkop intake works Institute of Mine Seismology, Australia Geoid Geotechnical Engineers, South Africa calibration of modelled seismicity in south African Mines shaft sinking on the platreef project Institute of Mine Seismology, South Africa Ivanplats, South Africa optimizing stope panel spans at an easterm bushveld numerical model calibration: Process or luck? Platinum mine by probabilistic analysis University of Pretoria, Middindi Consulting (Pty) Ltd, South Africa Impala Platinum Limited, Marula Platinum Mine, South Africa overburden response to longwall mining calibration of a numerical model for bore-and-fill mining CSIRO, Australia CSIR, South Africa Design of an in situ testiing device for the backfill of Active ultrasonic imaging and interfacial characterization of mechanised driven tunnels in hard rock stationary and evolving fractures in rock Graz University of Technology, University of Minnesota, USA cost analyses of a mine roadway driven by conventional and experimental study on hydraulic conductivity of a rock joint mechanized methods Seoul National University, Korea Bulent Ecevit University, Turkey Analytical and experimental analysis of hard rock indentation process Ecole Nationale d’Ingénieurs de Tunis, Université de Tunis El Manar, Tunisia Progress of brittle micro-fracturing in crystalline rocks under cyclic loading conditions Queen’s University, Canada Predictive strategies and risk management for rockbursting in deep tunnel and mine access development Queen’s University, Canada Raisebore camera survey using drones OceanaGold Corporation, Phillipines Reinforced rock landfill design from coal boiler bottom ash, fly ash and geosynthethics- Şirnak case assessment on restoration Şirnak University, Turkey observational studies in south African mines to mitigate seismic risks CSIR, The University of the Witwatersrand, Council for Geoscience,