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.

• Cover
• Half Title
• Title Page
• Copyright Page
• Table of contents
• Preface
• Committees
• Sponsors
• Sponsor sessions
  • Efficient paste mix designs using new generation backfill admixtures– perception versus reality
  • Paste fill stiffness investigation
  • Pulsation dampening systems for piston pumps operating at backfilling installations
  • Paste quality control benchmarks
  • Using paste backfill for stabilizing underground stopes at the Giant Mine remediation project
  • Investigation into the high transients experienced in Eleonore Mine’s pastefill distribution system
• Paste backfill measurements and testing
  • The effect of curing conditions on the strength development of cemented backfill samples
  • Experimental investigation on shear strength properties of interface between backfill and rock
  • The concept of obtaining backfilling material using the dredging method
  • The properties of the backfill mixtures based on own fine-grained waste
  • Cemented paste backfill failure envelope at low confining stress
  • Cemented paste backfill response to isotropic compression
  • Evaluating cemented paste backfill plug strength and the potential for continuous pouring1
• 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
  • Determining the required underground grout pack production profile for narrow tabular mining operations
  • Rheological yield stress measurement of paste fill: New technical approaches
• Backfill reticulation: pumping, piping, hydraulic analyses
  • Automated diverter valves at Kirkland Lake Gold Fosterville mine improve safety and efficiency
  • Filter revamping, the economic way to get old filters in tailings dewatering back on track
  • Theoretical method to improve the placement of backfill behind barricades
• Laboratory testing on static and dynamic behaviours of backfill
  • Anovel approach to assessing the early age strength of fibrecrete, using shear wave velocity
  • Adesign procedure for evaluation and prediction of in-situ cemented backfill performance
  • The uniaxial compressive strength of fiber-reinforced frozen backfill
  • Incorporating the monolithic nature of paste backfill into self heating assessments
• Minefill geomechanics, numerical modeling, mitigation of subsidence
  • Dem numerical modeling of longwall extraction of coal in “Mysłowice” colliery
  • Deformations of the mining area surface as aresult of exploitation with sealing of caving gobs
  • Geomechanical safety aspects in hard rocks mining based on room-and-pillar and longwall mining systems
• Legal, safety, and environmental drivers for backfill
  • Filling underground voids to prevent water hazards in active and decommissioned hard coal mines
  • Impact of the method of managing opencast excavations by filling with mining waste on the quality of leachate entering the surface water
  • Properties of cemented backfill prepared on the basis of selected Coal Combustion Products (CCPs)
  • Impact involving the sealing degree of caving goaf with fine-fraction hydraulic mixtures on the ventilation parameters of longwall headings
• Case studies
  • Geomechanical analysis of the rock mass stability in the area of the “Regis” shaft in the “Wieliczka” salt mine
  • Case study: Paste plant retrofit
  • Review of sandfill reticulation system at northern Ontario mine
  • Paste-waste design and implementation at Newmont Goldcorp’s Tanami Operation
  • Summary of improvements to the backfill system at DBS operations
  • Case study– design and implementation of ahigh density cemented hydraulic fill system at OZ Mineral’s Prominent Hill mine
  • Green mining– use of hydraulic backfill in the Velenje Coal Mine
• Author Index