Casino Project: Interactive Design of A Large Tailings Dam to Achieve Mine Waste Mangement Objectives

Casino Project: Interactive Design of A Large Tailings Dam to Achieve Mine Waste Mangement Objectives

Author: Sanne Brinkman, Graham R. Greenaway
Conference: CDA Annual Conference 2014
Date: October 4-9, 2014

The Casino Project is a proposed copper-gold-molybdenum mine in the southwest Yukon. The deposit will be mined using open pit methods with a nominal mill throughput of approximately 125,000 tonnes per day of ore over a 22 year operating life. The climate at the project site is characterised by long, cold, dry winters and short, warm, wet summers. Permafrost is discontinuous over the Tailings Management Facility embankment area.

A waste and water management plan has been developed that considers geotechnical and geochemical characteristics of the various waste materials produced over the operating life of the mine. Waste rock and tailings will be selectively placed to provide subaqueous disposal of potentially acid generating materials, mitigate metal leaching potential and ensure long-term water quality and geotechnical performance objectives are achieved. The waste management strategy and dam design are being optimised during successive design stages as a better understanding of the geotechnical conditions and geochemical characteristics of the waste materials is obtained. The mine waste materials will be placed in a valley impoundment and constrained by a zoned embankment dam. The embankment will be constructed in stages using the centreline method, reaching a maximum height of over 280 metres at the end of mining operations. Mine tailings will be de-pyritized and cycloned to provide suitable sand fill for construction of the embankment shell zones. Design considerations include integration of the mine production schedule with construction of the Tailings Management Facility embankment and placement of waste rock, the impact of the cold climate on dam construction and facility operations, the impact of discontinuous permafrost foundation conditions on dam stability and integrity, and the effect of high confining stresses on the strength and permeability characteristics of the embankment construction materials.

 

Download the full technical paper.

Download

Recent Insights

January 2024
Balancing Act: Water Usage Management Vital for a Sustainable Future
January 2024
A Difficult Balance Between Engineering, Environmental, Social and Economic Aspects
November 2023
Knight Piésold Commences with the ESIA for Haib Copper
November 2023
Insights from the Compilation and Critical Assessment of Breach and Runout Characteristics from Historical Tailings Dam Failures: Implications for Numerical Modelling
November 2023
Earthquake-induced Deformation Analysis of a TSF Undergoing Tailings Reprocessing
November 2023
Case Study: Approach to Determining the Risk Mitigation Priority of a Historic TSF in North America
October 2023
Data Management and Insights for Effective Tailings Storage Facility Management
October 2023
The Role of Sensitivity Analysis in Selecting Dam Breach Parameters
October 2023
Influence of Increased Confining Stress on Undrained Behavior of Tailings: A Case History at the Candelaria Mine
October 2023
The Re-use of Existing Bituminous Stabilised Materials for the Rehabilitation of National Route 7 - Case Study
September 2023
Transición energética para gerentes de mina
August 2023
Interview: Guillermo Barreda, Gerente General, Knight Piésold Perú
July 2023
Selection of Soil Shear Strength Parameters Based on Integrated In Situ Tests, Lab Tests and Numerical Calibration Approach
June 2023
Leveraging Knowledge and Experience of a Well-Formed Independent Tailings Review Board to Enhance Tailings Facility Safety
May 2023
Is the Implementation of Dry Stacking for Tailings Storage Increasing? A Southern African Perspective
February 2023
Canadian Consulting Engineer's Lifetime Achievement Awards: Jeremy Haile
February 2023
Geotechnical Characterization of Collapsible Salty Sands Subjected to Monotonic and Cyclic Loadings – A Case Study for Areas with High Seismicity
November 2022
Application of the 3D Limit Equilibrium Method in Tailings Dam Breach Analysis
November 2022
Evaluation of Tailings Behaviour for Dam Breach Assessments
November 2022
Tailings Improvement by Stress-Densification from Waste Rock Capping