Articles

From Theory to Practice: Backfill Engineering in Action at Our 2026 Course
18 September 2026

From Theory to Practice: Backfill Engineering in Action at Our 2026 Course

Paterson & Cooke recently welcomed mining professionals to Cape Town, South Africa, for our annual Backfill Design & Operation Course, held from 7 to 9 September 2026. We reflect on the highlights, and find out what our delegates had to say about this event.

by Bruno Salvoldi
Shaping the Future of Tailings Management in South America
8 September 2026

Shaping the Future of Tailings Management in South America

Paterson & Cooke brought together more than 80 mining professionals in Lima to explore the future of tailings management through our Filtered and Thickened Tailings Course. Read more about this successful event.

by Daniel Alamos
Paterson & Cooke Chile Expands Laboratory Capabilities with Uniaxial Compressive Strength (UCS) Testing
7 August 2026

Paterson & Cooke Chile Expands Laboratory Capabilities with Uniaxial Compressive Strength (UCS) Testing

Reliable laboratory testing plays a critical role in the design and optimisation of cemented mine backfill systems. Paterson & Cooke is proud to announce that our Santiago, Chile laboratory has expanded its capabilities by implementing UCS testing. This investment further strengthens our global network of specialist laboratories, which now all offers backfill testing.

by Daniel Alamos
Paterson & Cooke’s Denver Laboratory celebrates ISO 9001 certification
24 July 2026

Paterson & Cooke’s Denver Laboratory celebrates ISO 9001 certification

Achieving ISO 9001 certification marks an important milestone for Paterson & Cooke’s Denver Laboratory. Learn how the team’s dedication to quality and operational excellence has strengthened our laboratory capabilities and enhanced the services we provide to our mining clients.

by Nick Gow
Delivering One of Morocco’s Most Significant Water Infrastructure Projects
7 July 2026

Delivering One of Morocco’s Most Significant Water Infrastructure Projects

Water security has become one of the defining engineering challenges facing the mining industry globally. Read more about how this challenge took centre stage in Morocco with the successful commissioning of the Jorf Lasfar to Khouribga (J2K) desalinated water pipeline system.

by Julian Rusconi
Why Mine Backfill Has Become Critical to the Future of Underground Mining
15 June 2026

Why Mine Backfill Has Become Critical to the Future of Underground Mining

Watch as our industry experts break down how modern mine backfill systems are transforming underground mining operations around the world. From pastefill technology and cemented rock fill systems to large-scale integrated mine infrastructure, this conversation reveals why mine backfill has become one of the most critical parts of modern mining engineering.

by Leslie Correia
Why Proper Sampling Matters in Mineral Processing Testing
21 May 2026

Why Proper Sampling Matters in Mineral Processing Testing

In mineral processing testing, good data starts with good sampling. No matter how advanced the equipment or how detailed the test work is, the results are only as reliable as the sample being tested. Read more about the factors that make the biggest difference in reducing technical risk and generating reliable metallurgical data.

by Nick Gow
Rethinking Tailings Management in a Changing Mining Landscape
11 February 2026

Rethinking Tailings Management in a Changing Mining Landscape

Industry evaluations often default to cost-focused comparisons, typically capital and operating cost of the process equipment, tailings transportation system, or material handling fleets. Given growing concerns around water scarcity, this article highlights the need for a holistic, systems-based approach that integrates technical, environmental, and operational drivers.

by Rachel Jansen
Static Cylinder Settling Test – A Simple Test That Delivers High Value
9 January 2026

Static Cylinder Settling Test – A Simple Test That Delivers High Value

Static cylinder settling tests are a fundamental part of understanding slurry settling behaviour. Although the procedure is simple, the test provides valuable insights into slurry system surface chemistry and solid-liquid interaction, allowing optimisation of tailings dewatering.

by Rachel Jansen
Paterson & Cooke South America Hosts Technical Training on Tailings Solutions
21 November 2025

Paterson & Cooke South America Hosts Technical Training on Tailings Solutions

In October, Paterson & Cooke South America held the “Thickened, Paste, and Filtered Tailings Course” at the Icon Hotel, in Santiago, Chile. Over two days, topics such as Transport, Thickening, Filtration, and Backfill were covered, along with practical laboratory demonstrations that allowed for a deeper understanding of these subjects.

by Daniel Alamos
Why Paste Pump Performance Matters in Underground Backfill Systems
29 October 2025

Why Paste Pump Performance Matters in Underground Backfill Systems

When it comes to backfilling mines with paste, transporting the paste material from the surface plant down into the stopes is critical. The reliability of this transport network, known as the underground distribution system (UDS), directly impacts mining schedules, binder consumption, and ultimately, operating costs.

by Leslie Correia
Understanding Coagulation & Flocculation in Slurries
7 October 2025

Understanding Coagulation & Flocculation in Slurries

Efficient slurry dewatering is key to many mining and mineral processing operations, and two of the most important processes involved are coagulation and flocculation. This short demonstration provides a clear and practical look at the fundamentals of coagulation and flocculation to optimise reagent usage.

by Rachel Jansen
From Flow to Future: Managing Long-Distance Pipelines
8 September 2025

From Flow to Future: Managing Long-Distance Pipelines

Long-distance pipelines are critical mining assets transporting valuable concentrates like copper and iron. We take a look at how to keep pipelines safe & reliable, and how to embed integrity management into planning.

by Leonardo Olavarria
Enhancing Mine Planning Efficiency with Client Collaboration
13 May 2025

Enhancing Mine Planning Efficiency with Client Collaboration

Our industry experts Todd Wisdom, Rachel Jansen, and Kathy Adams had the privilege of being interviewed for a Mining Now episode. They share their insights on the pressing challenges faced by the mining sector and how Paterson & Cooke’s pioneering solutions are reshaping the future of mineral processing and tailings management.

by Kathy Adams
Case study: Media Luna paste system
3 April 2025

Case study: Media Luna paste system

Discover the unique challenges encountered and the difficult yet necessary decisions to ensure that Torex will have a world-class paste plant when backfill operations start-up in 2025.

by Brent Robitaille
Pressure filter collection systems: sizing and optimisation
3 April 2025

Pressure filter collection systems: sizing and optimisation

This paper covers the surge discharge rate calculations and provides control considerations to reduce downstream surge requirements and considers both the advantages and disadvantages of the various control options.

by Matt de Boer
Investing in the Next Generation – The Junior Engineers Hub
12 March 2025

Investing in the Next Generation – The Junior Engineers Hub

At Paterson & Cooke Europe, we believe that investing in the next generation of engineers is key to driving innovation and sustaining excellence in our industry. That’s why we’re excited to introduce the Junior Engineer Hub—a structured support system designed to help early-career engineers grow, learn, and thrive.

by Damian Granlund
Announcing a Paterson & Cooke and CMEH Partnership
12 February 2025

Announcing a Paterson & Cooke and CMEH Partnership

Paterson & Cooke UK is excited to be part of the new Critical Mineral Equipment Hub (CMEH) in Cornwall. Find out more about what the CMEH is and how this partnership will benefit our clients.

by Paul Ainsworth
How to Visualise Slurry Flow: A Unique Demonstration Tool
15 January 2025

How to Visualise Slurry Flow: A Unique Demonstration Tool

At Paterson & Cooke, we understand the challenges of designing reliable slurry transport systems. That’s why our UK office has developed an innovative pipe loop, specifically designed to visually demonstrate the behaviour of settling slurries during pipeline flow. View a video of how we use a safe mix of water and coloured beads to effectively simulate slurry dynamics.

by Ignacio Bazan
Fill in the Details: The Evolution of Backfill
4 December 2024

Fill in the Details: The Evolution of Backfill

Paterson & Cooke’s Maureen McGuinness chatted to CIM Magazine to discuss the evolution of backfill and the key role it has to play in mine planning.

by Maureen McGuinness
Ensuring Safe Cyanide Management: The Path to Cyanide Code Certification
30 October 2024

Ensuring Safe Cyanide Management: The Path to Cyanide Code Certification

The International Cyanide Management Code was developed to guide the gold mining industry, cyanide producers, and transporters in adopting safer practices with the aim of protecting mine workers, the public, and the environment. In this article we discuss why Cyanide Code certification matters, and unpack the steps required to become an official Cyanide Code signatory.

by Chase Ruff
A Holistic Approach to Large-scale Alternative Dewatered Tailings Management: Lessons from Case Studies
20 April 2024

A Holistic Approach to Large-scale Alternative Dewatered Tailings Management: Lessons from Case Studies

Large-scale alternative dewatered tailings applications are increasingly being considered in the mining industry in an era of water scarcity and focus on dam structural integrity. However, evaluating business cases for these applications is often ineffective when based on costs alone. This paper makes the case for a new, more holistic approach to create effective business cases for evaluating large-scale alternative dewatered tailings applications.

by Rachel Jansen
Design and commissioning of coal fly ash filter plant
26 April 2023

Design and commissioning of coal fly ash filter plant

This paper outlines the design process of a fly ash filtration, conveying, and truck loadout performed by Paterson & Cooke. Some vital issues discussed are deciding on what filter technology to use and designing to ensure continuous operation.

by Jason Hamelehle
Case study: Fruta del Norte paste plant
25 April 2023

Case study: Fruta del Norte paste plant

The design of this paste plant is unique, accounting for challenges in topography, a sensitive local environment and challenging feed tailings. Read more about the unique paste plant design.

by Leslie Correia
Optimal paste backfill specification development
23 April 2023

Optimal paste backfill specification development

The paper describes how, through the use of material test work data, relationships linking strength, rheology, and curing time performance criteria can determine the optimal paste backfill specification.

by Stephen Wilson
Reduction of strength losses in paste backfill with sludge cake
20 April 2023

Reduction of strength losses in paste backfill with sludge cake

In a study by P&C for a future mine located in the Iberian Pyrite Belt, an investigation into the addition of the mine waste water treatment precipitated cake (sludge cake) in the CPB was conducted in parallel to testing CBP without the inclusion of sludge cake (i.e. 100% tailings).

by Ignacio Bazan
Tailings In-line Flocculation
12 May 2021

Tailings In-line Flocculation

In-line flocculation is becoming increasingly more common in tailings dewatering. In fine tailings storage facilities, problematic clay mineral particles may not settle effectively and additional processes are required to promote … Read More

by Paterson Cooke
Slack Flow – To Be or Not To Be
29 October 2020

Slack Flow – To Be or Not To Be

I was working with my P&C teammates on a brownfields tailings project where the owner was planning to construct a new tailings storage facility (TSF). The new TSF was adjacent … Read More

by Paterson Cooke
Backfill – Key Properties
29 September 2020

Backfill – Key Properties

When designing an underground mine, one of the key decisions is whether to backfill the voids left by mining. The backfilling decision is generally influenced by a range of factors … Read More

by Paterson Cooke
Tailings Pump Station Layout – Planning for the Future
18 June 2020

Tailings Pump Station Layout – Planning for the Future

Paterson & Cooke is currently engaged on several tailings pumping system upgrade projects. These are typically associated with increased throughput requirements (associated with a plant expansion), increased pumping head requirement, … Read More

by Paterson Cooke
Paste Backfilling on a Budget
23 April 2020

Paste Backfilling on a Budget

Low Capital Investment Options to Support Mining Activities Paste backfill has become known as a superior ground support tool and mine waste disposal method, albeit usually one with a higher … Read More

by Paterson Cooke
Data Uncertainty Related To Backfilling Operations
14 April 2020

Data Uncertainty Related To Backfilling Operations

A recurring problem in mining projects is the collection and interpretation of data which is applicable to backfilling operations in general. The basis for design is therefore compromised by external … Read More

by Paterson Cooke
Arctic Climate Pipeline Design Considerations
1 April 2020

Arctic Climate Pipeline Design Considerations

Over the years there has been an increasing trend for resource companies to develop mining projects in cold regions and areas of permafrost. The arctic presents unique engineering challenges. Many … Read More

by Paterson Cooke
Operating Slurry Pipelines with a Deposit
12 September 2019

Operating Slurry Pipelines with a Deposit

Slurry pipelines are conventionally designed to operate without a deposit on the pipeline invert – i.e. the minimum operating velocity is greater than the deposition velocity. Largely this approach has … Read More

by Paterson Cooke
Technical and Cultural Tour: T&S 2019 Conference
4 September 2019

Technical and Cultural Tour: T&S 2019 Conference

Delegates to the 2019 Transportation & Sedimentation Conference will be treated to a technical tour of the Slurry Test Facility at Paterson & Cooke’s premises in Pinelands on Thursday 26th … Read More

by Paterson Cooke
On-Site Operator Training
16 July 2019

On-Site Operator Training

Sharing knowledge has always been part of Paterson & Cooke’s culture and as far back as 1995 we began presenting our well-known course on slurry pipeline design to inform our … Read More

by Paterson Cooke
T&S Conference : September 2019
4 June 2019

T&S Conference : September 2019

The 19th International Conference on Transport & Sedimentation of Solid Particles will be held in Cape Town from 24 – 27 September 2019. The Cape Town Hotel School, situated close … Read More

by Paterson Cooke
Optimisation of cemented aggregate backfill at New Luika Gold Mine
10 May 2019

Optimisation of cemented aggregate backfill at New Luika Gold Mine

This paper presents a case study of an optimisation of a CAF material by the addition of tailings in order to increase the paste fraction of the material. The main aim was to decrease the angle of repose to improve filling ability in addition to decreasing the required binder content.

by Bruno Salvoldi
Transport & Sedimentation of Solid Particles
18 March 2019

Transport & Sedimentation of Solid Particles

For the first time since its inception in Poland in 1971 the International Conference on Transport & Sedimentation of Solid Particles will be hosted outside of Europe. Cape Town, South Africa is … Read More

by Paterson Cooke
New Technology for Tailings Design
20 February 2019

New Technology for Tailings Design

Josh Stowe from our Denver office will be presenting a paper at the SME Conference in Denver entitled NEW APPROACHES AND TECHNOLOGY FOR TAILINGS PIPELINE DESIGN AND OPERATION. The conference … Read More

by Paterson Cooke
Triaxial Test Work Capability
9 January 2019

Triaxial Test Work Capability

Triaxial testing represents international best practise for determining the important geotechnical parameters of shear strength and cohesion of soils. These parameters are important to uncemented backfill applications, but have also … Read More

by Paterson Cooke
TAILINGS 2018 : Santiago, Chile
9 July 2018

TAILINGS 2018 : Santiago, Chile

Carlos Salinas, Lars Martinson, Ray Martinson and Paulo Eriz from our Santiago office and Mike Cook from the Denver office have written papers that will be presented at the TAILINGS … Read More

by Paterson Cooke
PASTE 2019 – Save the Date
2 July 2018

PASTE 2019 – Save the Date

We are pleased to be co-hosting Paste 2019 together with the Australian Centre for Geomechanics. The 22nd International Conference on Paste, Thickened and Filtered Tailings will be held in Cape … Read More

by Paterson Cooke
Paterson & Cooke Cape Town Wins Prestigious Award
26 October 2017

Paterson & Cooke Cape Town Wins Prestigious Award

The Cape Town office of Paterson & Cooke, a global specialist engineering consultancy, was presented with the award for BEST INTERNATIONAL PROJECT at the recent SAICE – SAFCEC awards ceremony … Read More

by Paterson Cooke
Mobile Metallurgical Sampler (MMS)
26 October 2017

Mobile Metallurgical Sampler (MMS)

By Fritz van Sittert | Director at Paterson & Cooke Paterson & Cooke Plants & Products has developed a Mobile Metallurgical Sampler (MMS) to determine the potential loss of valuable … Read More

by Paterson Cooke
P&C / SASOR Co-host Technical Talk
26 October 2017

P&C / SASOR Co-host Technical Talk

By Peter Goosen | Director at Paterson & Cooke Paterson & Cooke (P&C), Cape Town, together with The Southern African Society of Rheology (SASOR) recently co-hosted a technical talk and … Read More

by Paterson Cooke
Gwalia mine – backfill system operational review
10 May 2015

Gwalia mine – backfill system operational review

This paper presents an overview of the review along with an assessment of the current and future reticulation systems, concluding from it a number of value-adding recommendations. Additionally, comment is made on best practice in paste fill system management.

by Stephen Wilson
A critical look at uniaxial test procedures applied in the backfill industry
14 May 2014

A critical look at uniaxial test procedures applied in the backfill industry

This paper compares the most commonly used UCS test procedures. The paper will then investigate the effect of the most important parameters influencing test results, such as specimen shape, size and aspect ratios, by presenting laboratory test results for a specifically designed test campaign.

by Bernardt van der Spuy
Paste backfill design case study — Efemçukuru project
11 October 2010

Paste backfill design case study — Efemçukuru project

Paterson & Cooke completed the basic engineering of the paste backfill reticulation system for Eldorado Gold’s Efemçukuru project in Turkey. This paper presents a case study of the project.

by Robert Cooke
Shear and Rheology Reduction for Flocculated Thickened Tailings
10 May 2009

Shear and Rheology Reduction for Flocculated Thickened Tailings

This paper presents the test work results with the purpose of initiating discussion regarding the importance of conditioning flocculated high density thickened tailings to minimise rheology for pumping and pipeline transportation.

by Carlos Salinas