MINEFILL 2020-2021 The series of International Symposiums on Mining with Backfill explores both the theoretical and practical aspects of the application of mine fill, with many case studies from both underground and open-pit mines. Minefill attendees and the Proceedings book audience include mining practitioners, engineering students, operating and regulatory professionals, consultants, academics, researchers, and interested individuals and groups. The papers presented at Minefill symposiums regularly offer the novelties and most modern technical solutions in technology, equipment, and research. In that way, the papers submitted for the Minefill Symposia represent the highest quality and level in the conference domain. For the 2020-2021 edition organizers hope that the papers presented in this publication will also be received with interest by readers around the world, providing inspiration and valuable examples for industry and R&D research. Hassani • Palarski Sokoła-Szewioła Strozik MINEFILL 2020-2021 Edited by Ferri Hassani • Jan Palarski, Violetta Sokoła-Szewioła • Grzegorz Strozik www.routledge.com CRC Press titles are available as eBook editions in a range of digital formats MINEFILL 2020-2021 PROCEEDINGS OF THE 13TH INTERNATIONAL SYMPOSIUM ON MINING WITH BACKFILL, KATOWICE, POLAND, 25-28 MAY 2021 Minefill 2020-2021 Editors Ferri Hassani McGill University, Canada Jan Palarski Silesian University of Technology, Poland Violetta Sokoła-Szewioła Silesian University of Technology, Poland Grzegorz Strozik Silesian University of Technology, Poland CRC Press/Balkema is an imprint of the Taylor & Francis Group, an informa business © 2021 Copyright: Authors Typeset by Integra Software Services Pvt. Ltd., Pondicherry, India The Open Access version of this book, available at www.tandfebooks.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license. Published by: CRC Press/Balkema Schipholweg 107C, 2316XC Leiden, The Netherlands e-mail: [email protected] www.routledge.com – www.taylorandfrancis.com ISBN: 978-1-032-07203-6 (Hbk) ISBN: 978-1-032-07205-0 (Pbk) ISBN: 978-1-003-20590-6 (eBook) DOI: 10.1201/9781003205906 https://doi.org/10.1201/9781003205906 Minefill 2020-2021 – Hassani et al (eds) © 2021 Taylor & Francis Group, London, ISBN 978-1-032-07203-6 Table of contents Preface ix Committees xi Sponsors xiii Sponsor sessions Efficient paste mix designs using new generation backfill admixtures – perception versus reality 3 F. Erismann & M. Hansson Paste fill stiffness investigation 13 J.D.V. Wickens & S. Wilson Pulsation dampening systems for piston pumps operating at backfill installations 22 T. Lutz & P. Peschken Paste quality control benchmarks 35 D. Stone Using paste backfill for stabilizing underground stopes at the Giant Mine remediation project 44 B. Ting, D. Stone, K. Ruptash & B. Fabien Investigation into the high transients experienced in Eleonore Mine’s pastefill distribution system 53 M. McGuinness, K. Creber, J. Jacobs & B. Haley Paste backfill measurements and testing The effect of curing conditions on the strength development of cemented backfill samples 67 B. Dennis & M. Helinski Experimental investigation on shear strength properties of interface between backfill and rock 80 G. Liu, W. Wu, L. Guo, X. Yang & Z. Zhang The concept of obtaining backfilling material using the dredging method 90 M. Gruszczyński, S. Czaban, & Sz. Zieliński The properties of the backfill mixtures based on own fine-grained waste 102 R. Pomykała & W. Kępys Cemented paste backfill failure envelope at low confining stress 108 M. Grabinsky & A. Pan v Cemented paste backfill response to isotropic pressure 118 M. Grabinsky & M. Jafari Evaluating cemented paste backfill plug strength and the potential for continuous pouring 127 M. Grabinsky, B. Thompson & W. Bawden Binders, admixtures, and other chemicals to improve fill performance The influence of the flocculant on the process of thickening and depositing of copper ore flotation tailings 143 M. Gruszczyński, S. Czaban, R. Pratkowiecki, Z. Skrzypczak & P. Stefanek Determining the required underground grout pack production profile for narrow tabular mining operations 153 B. van der Spuy Rheological yield stress measurement of paste fill: new technical approaches 169 M. Silva, M. Hansson & M. Costa e Silva Backfill reticulation: pumping, piping, hydraulic analyses Automated backfill diverter valves at Kirkland Lake Gold Fosterville Mine improve safety and efficiency 185 R. Evans & G. Trinker Filter revamping, the economic way to get old filters in tailings dewatering back on track 194 J. Hahn Theoretical methods to improve the placement of paste backfill behind barricades 204 C. Lee Laboratory testing on static and dynamic behaviours of backfill A novel approach to assessing the early age strength of fibrecrete, using shear wave velocity 217 S. McGrath & M. Helinski A design procedure for evaluation and prediction of in-situ cemented backfill performance 227 X. Wei & L. Guo The uniaxial compressive strength of fiber-reinforced frozen backfill 234 H. Niu, F.P. Hassani, M.F. Kermani & M. He Incorporating the monolithic nature of paste backfill into self-heating assessments 244 C. Lee, B. Timmis, D. Brown, V. Bertrand & M. Stewart Minefill geomechanics, numerical modeling, mitigation of subsidence DEM numerical modeling of longwall extraction of coal in “Mysłowice” colliery 261 G. Smolnik Deformations of the mining area surface as a result of exploitation with sealing of caving gobs 272 V. Sokoła-Szewioła, A. Mierzejowska & M. Poniewiera vi Geomechanical safety aspects in hard rocks mining based on room-and-pillar and longwall mining systems 288 W. Pytel, B. Pałac-Walko & P. Mertuszka Legal, safety, and environmental drivers for backfill Filling underground voids to prevent water hazards in active and decommissioned hard coal mines 307 G. Strozik Impact of the method of managing opencast excavations by filling with mining waste on the quality of leachate entering the surface water 317 S. Rzepecki, A. Grodzicka & K. Moraczewska-Majkut Properties cemented backfill prepared on the basis selected coal combustion products (CCPs) 327 P. Pierzyna Impact involving the sealing degree of caving goaf with fine-fraction hydraulic mixtures on the ventilation parameters of longwall headings 337 M. Popczyk & D. Musioł Case studies Geomechanical analysis of the rock mass stability in the area of the “Regis” shaft in the “Wieliczka” Salt Mine 349 G. Dyduch, P. Jarczyk & M. Jendryś Case study: paste plant retrofit 360 L. Correia, B. Cothill, P. Antunes & S. James Review of sandfill reticulation system at northern ontario mine 375 J. Landriault, D. Dewit & J. Yamine Paste-waste design and implementation at newmont goldcorp’s tanami operation 382 R.L. Veenstra & J.J. Grobler Summary of improvements to the backfill system at DBS operations 398 A. Zajac & R.L. Veenstra Case study – design and implementation of a high density cemented hydraulic fill system at Oz Mineral’s Prominent Hill Mine 409 M. Helinski & J. Shaw Green mining – use of hydraulic backfill in the Velenje coal mine 422 J. Kortnik Author index 433 vii Minefill 2020-2021 – Hassani et al (eds) © 2021 Taylor & Francis Group, London, ISBN 978-1-032-07203-6 Preface The series of International Symposium on Mining with Backfill (Minefill) explores both the theor­ etical and practical aspects of the application of mine fill, with many case studies from both under­ ground and open-pit mines. Minefill attendees include mining practitioners, engineering students, operating and regulatory professionals, consultants, academics, researchers, and interested indi­ viduals and groups from within the wider community. There are presentations from people from around the world working in very diverse environments, with a range of local expertise showing their unique problems but common solutions. Since the first Symposium held in Mount Isa in 1973, the series has had 12 editions. Since 1998 it has a form of a triennial symposium being held most frequently in Australia, Canada, South Africa, and the United States. The Symposium topics evolve with the development of trends in mine fill technologies, overall mining problems, hazards, environmental standards, etc. In the current edition of the Symposium Minefill 2020-2021, the following range of detailed themes has been proposed: ➢ Legal, safety, environmental and financial drivers for backfill ➢ Mine fill geomechanics, numerical modeling, the interaction between backfill and rock mass ➢ Bulkhead capacity and fill strategies ➢ Binders, admixtures, and other chemicals to improve fill performance ➢ Backfill reticulation: pumping, piping, hydraulic analyses ➢ Field fill mass blast and stress monitoring before and after exposure and data analysis ➢ Laboratory testing on static and dynamic behaviors of backfill ➢ Hazard and risk control practices in backfill application ➢ Application of new technology and new equipment in mining with backfill ➢ Influence of mining with backfill on the mitigation of subsidence related hazards ➢ Case studies. This year, the Symposium is organized in the Silesia Coal Region in Poland, where hydraulic fill has been used for the first time in the world. Originally, the Symposium was planned for 2020, but due to the extraordinary epidemic situation related to COVID-19 (SARS-Cov-2 virus), the conference was moved to 2021, with the name of the Symposium being Minefill 2020-2021. The organization of the Symposium was adopted in a remote form on a specially dedicated platform. Polish underground mines of