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MINES AND ENVIRONMENT
MINE CLOSURE 2023
WA CONFERENCE 

Effective mine closure planning and environmental impact assessment (EIA) alike are essential practices well established in international practice that attempt to ensure that mining activities meet sustainable development expectations. Responsible mining practices are continually evolving with ever more emphasis on values-based behaviors that deliver sustainable benefits for people and the planet, even after a mine is closed. The future of the mining industry is dependent on the legacy it leaves. Industry reputation is affected when mines are abandoned or long-term detrimental environmental impacts emerge because they were not appropriately addressed

The WA Mines and Environment's Mine Closure Conference brings together national and local  mining and environmental industry professionals face-to-face and a virtual audience from across the globe.

Here delegates can learn, share and collaborate on the latest information,  mine closure regulation/auditing findings, framework,  research, and findings designed to close the gap in communication and address compliance for a sustainable future. 

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Participate in robust discussions, remain updated and informed, and connect with multi-discipline sectors and peers.

The conference will be held face-to-face and virtual - livestreamed from WA and will feature a high-quality technical program and expert keynote speakers.

The hybrid conference format for the WA Mine Closure Conference is expected to attract regional Australians and global audiences whilst providing an in-person experience in Perth. The Mines and Environment Mine Closure Conference provides a forum for presenting the latest updates, and to discuss current and future issues facing the mining and environmental sectors. Early bird Registrations are now open. 

Mine Closure WA Conference 2023

Date: Wed 15th March 2023

Venue: Kings Park State Reception Centre 

60 Fraser Ave, West Perth Western Australia 

Time: Arrival 8.00 am for 8.30 start. Finish:  4.30 pm 

Optional Dinner: 6.30pm - 11.30pm. Includes dinner, beverages, and light entertainment. 

RSVP : 28th February 2023 unless sold out. 

COST:  $790PP

Book individually or book a table of 8.

Tables of 8: $6320 (inc GST) 

CONFERENCE DINNER OPTION 

Includes sit down 3 course meal, entertainment, beverages

6.30 PM - 11.30 PM

Dress: Semi-Formal 

CONFERENCE & DINNER EARLY BIRD $985pp

Additional Dinner Guests (Dinner only )*: $195pp

Booking and credit card fees apply

CONFERENCE LIVESTREAM: AUD $690PP

Livestreamed Globally. UTC/GMT +8 hours

Please register to secure the early bird

Agenda 

*Additional Dinner Guest ticket: must be a guest of a Conference ticket holder.

The dinner price is for Dinner only. All prices include GST 

Key Note Speakers 

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Team Leader Mine Closure and Technical Advice 

Dept of Mines, Industry Regulation and Safety

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Senior Principal Mine Closure Specialist, Stantec

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Professor

Alex Gardner 

University of WA

Environmental legal consultant to the Environmental Defender's Office (WA) and to Western Australian Government Agencies responsible for water resources management. 

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Sarah Holcombe

Senior Research Fellow

Centre for Social Responsibility in Mining, UQ. 

University of Queensland 

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Senior Technical Advisor  

Okane Consultants 

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Chief Executive Officer
Cooperative Research Centre for Transformations in Mining Economies

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Professor

Peter Cook 

Professorial Research Fellow

Flinders University 

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Principal Hydrogeology

Mineral Resources Limited

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Silver Sponsor 
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Topics

TOPICS 

For a full program please email minesandenvironment@jazcorpaustralia.com.au 

Regulating Mine Closure in Western Australia.
Dr Danielle Risbey

Team Leader Mine Closure & Technical Advice, Department of Mines, Industry Regulation and Safety.
 

Summary
The Department of Mines and Petroleum (now Department of Mines, Industry Regulation and Safety) published Guidelines for Preparing Mine Closure Plans in 2011.  Since then, the guidelines were revised twice (see current version Mine Closure Plan Guidance) and over 3,800 Mine Closure Plans have been submitted for assessment.  This presentation will highlight the key findings from our journey with mine closure in Western Australia (WA) over the past ten years and will cover:
•    Our approach to assessing and approving an evolving document such as a mine closure plan;
•    Developing guidance to target weak areas of mine closure plans;
•    Cultivating effective communication between industry and regulators to clarify expectations on mine closure;
•    Demystifying the relinquishment process.


The presentation will conclude with a preview of the next steps planned for regulating mine closure in WA.

 

Community legal rights in mine closure planning; a comparative analysis of three Australian States. 

Authors:  Professor Alex Gardner, University of WA  

and Laura Hamblin

Presenter: Professor Alex Gardner

Abstract

Rigorously regulated mine rehabilitation and closure planning (hereafter, ‘mine closure planning’) is central to a future of responsibly managed mine closure. Mine closure planning needs to balance paradoxical principles underpinning the key regulatory goals of safe, non-polluting and sustainable post-mine land use. Mine closure planning should be part of the initial mining proposal, progressive, effective and consultative. The regulation of mine closure planning also needs to be adaptable, as the life of a mine often spans several decades. Yet adaptability can be at the expense of consistency and legal enforceability.

 

Ultimately, the regulatory framework needs to balance the interests of local communities, government bodies and industry stakeholders to achieve a social transition to post-mine land use with minimal residual risks.

This paper presents a comparative analysis of the regulation of mine closure planning through the operation of mineral resources, environmental and planning law across three Australian States with unique mining industries. It highlights the regulatory evolution and notes, especially, how each State defines the rights of community consultation in that planning process, proposing future research to consider what effective community engagement might entail.

Facilitating Open Pit Mine Closure with Managed Aquifer Recharge

Peter G. Cook,

Ilka Wallis, Shannon Sloan, and Anthony D. Miller

Presenter : Professor Peter Cook, Flinders University 

 

Abstract

 

Controlled groundwater reinjection, or managed aquifer recharge (MAR), is an established and increasingly applied technology within the urban environment, centered around reinjection or infiltration of stormwater, reclaimed wastewater, and excess surface water to augment limited urban water resources.

 

It is, however, increasingly recognized as a promising water management tool that enables the re-use of water produced during mining and unconventional gas extraction and allows the return of water from dewatering operations back to the source aquifers. In the context of mining, MAR has the potential to reduce the environmental impacts associated with surface discharge, while minimizing the stress on local groundwater resources.

 

However, there is also increasing consideration of the role that MAR can play in mine closure. Dewatering of open pit mines can lower the regional water table for distances of several kilometers from the pit. Groundwater levels surrounding the pit will rise the following cessation of dewatering operations on mine closure. However, in the absence of MAR, stabilization of groundwater levels may take tens to hundreds of years.

 

If any excess water extracted to dewater the mine is re-injected into the subsurface, then this may accelerate the recovery of the water table.

Re-injection thereby needs to occur sufficiently far from the mine to minimize the amount of groundwater that flows back to the pit during mine operations but is still close enough to speed up the water table recovery post-mine closure.

 

The optimal injection distance increases with the aquifer hydraulic diffusivity and the mine life (duration of dewatering and injection). We present simple modeling results that illustrate the benefit of MAR for mine closure.

Environmental monitoring and managing water quality on rehabilitated landforms

Andrew Nelson 

Principal Hydrogeology

Mineral Resources Limited

Synopsis 

The process of re-establishing ecosystems on historic mining landforms is necessary to meet mine closure criteria and eventual land relinquishment but is also increasingly a consideration in the planning process of new mining ventures.

 

Commonly, the ecosystem component which presents the biggest threat to successful mine closure and rehabilitation projects is water-related risks.

In this presentation, the key themes of rationalization of environmental monitoring, catchment management of rehabilitated landforms, and environmental data management in closure are presented for consideration in new and existing mine closure implementation projects.

Building Better Mine Rock Stockpiles
– Integration with Mine Planning for Source Term Control and AMD Risk Management –

Mike O'Kane
Senior Technical Advisor, Okane Consultants

 

Synopsis 
This presentation will illustrate how our industry can de-risk future cash flow projected for projects.
The International Council on Mining & Metals (ICMM) defines integrated mine closure as: “…a dynamic and iterative process that considers environmental, social, and economic factors from an early stage of mine development and throughout the life of an asset...”. In this presentation and the subsequent discussion, we will define integrated mine planning and closure planning as: “…the process of considering both the extraction plan and the closure plan concurrently, such that one plan directly affects the other…”.

A substantial proposition of acidity generation and resulting acid and metalliferous drainage (AMD) risk arises from the presence of mine rock stockpiles (MRSs) at mine sites.
 
This is a result of site-specific climate conditions, the inherent reactivity of the run-of-mine (ROM) rock placed into an MRS, and the manner in which the rock is placed within the MRS (i.e. the physical conditions). 
Integrated mine planning and closure planning in respect of AMD risk arising from reactive or leachable material placed within an MRS focuses on applying rock placement methodologies that are atypical of most MRS construction practices.
 
This presentation will discuss how MRS construction strongly influences its AMD ‘behaviour’ during operations, and in closure, to substantially decrease unrecognized and underfunded risk to water groundwater and surface water resources. 

Case studies will be presented to illustrate opportunities to incorporate integrated mine planning and closure planning from the strategic project planning stages, through to active closure planning and execution.

Using Imagery to Develop a 3D Resource Model of Waste Rock Landforms for Closure Design
Kim Bennett: Stantec, Australia

Jared Erickson: Stantec, USA

David Blaxland: Gold Fields Ltd, Australia

Alex Langley: Gold Fields Ltd, Australia

Phil Crouse, Stantec, USA

Petina Wallace, Stantec, Australia

Presenter : Kim Bennet, Senior Principal Mine Closure Specialist Stantec 

 

​Abstract

Closure of large mine facilities (e.g., tailings storage facilities (TSFs)) often requires sourcing large volumes of variable material with specific characteristics.

Where feasible, identifying and sourcing appropriate material in the required volumes from local waste rock landforms (WRLs) is recognised as best closure practice. However, many WRLs are constructed during the mining process without considering the materials as a borrow resource for future mine closure.

Material investigations which characterise the composition of the material within a WRL and delineate the extents of similar materials are often constrained to the upper surfaces of the WRL.

 

Due to the height and variability of material within numerous WRLs, mine closure plans will often include knowledge gaps on material suitability and quantities.

This paper will present how imagery has been used to produce a 3D resource model of two WRLs at the Gold Fields St. Ives Gold Mine, located approximately 60 kilometers south of Kalgoorlie Western Australia, and how this has supported the closure design of three TSFs located adjacent to the WRLs.

The TSF closure plan requires sourcing various material types, including coarse fractured rock material for erosion protection, clean and competent material for the construction of new roadways and embankments, and fines material with suitable geochemical properties to support long-term vegetative growth to cover the TSF surface. Each of these closure material types will be sourced from specific pre-determined zones using the 3D resource model of the WRLs. 

St Ives and Stantec worked together to correlate mine pit geology, historic aerial imagery and/or aerial elevation data, and investigation data to develop a 3D Model that provides zones of waste rock materials having the required physical, chemical, geochemical and geotechnical properties required for cover systems.

Mapping and delineation of the zones of similar material that can then be quantified and targeted during closure planning and implementation is key to a cost-effective method of sourcing the different material types needed for closure.

 

Delineations are produced through having a sound understanding of the site geology, enhanced by reviewing any details related to the mining of the deposits from which the waste rock material was excavated, including historic aerial images, and numerous material characteristic test results of samples collected near the WRL surface at targeted locations.

The Social Aspects of Mine Closure

Presenter : Dr Sarah Holcombe 
Senior Research Fellow 

Centre for Social Responsibility in Mining, UQ. 

 

Abstract

This paper maps out some of the dominant themes on the social aspects of mine closure that have emerged from the literature to date. It draws from a paper written with colleague Nick Bainton (of the same title, in the journal of Resources Policy 2018) and expands on this to include more recent research that Holcombe has undertaken on this topic. A broad purpose is to characterise the social dimensions of the mine closure process.

The social dimensions of resource extraction have always presented a major challenge for the extractive industries.

 These dimensions include social and economic impacts, human rights, gender considerations, cultural heritage and human development, among others.

These challenges and risks are particularly acute towards the end of the project life-cycle when multiple pressures align.

 

These include financial constraints as production rates decline, unfulfilled socio-economic development expectations, and increased complexity surrounding legacy issues, to name but a few.

 Mine closures can, therefore, have significant adverse effects on local economies, contribute to impoverishment, trigger the loss of key services, and lead to out-migration. Poorly managed closure processes exacerbate these impacts and can damage corporate reputations, where operators are held responsible for the social mess that they have left behind.

It is increasingly the case that stakeholders expect mining operators to proactively manage the multi-dimensional impacts of closure – just as they are expected to manage impacts at other stages of the mine life.

 

Post Mine Futures 

Dr. Guy Boggs
Chief Executive Officer
Cooperative Research Centre for Transformations in Mining Economies

Synopsis

As the mining industry turns its attention to closure a new relationship is developing between mining companies, governments and communities. “Post Mine Futures” is evolving as a new component of the mining value chain.  Much can be done during mining operations to facilitate post closure outcomes that benefit industry, state and people alike – for example:

  • Delivery of sustained value to regional communities

  • Creation of national and international opportunities to METS companies

  • Healing Country and enabling enduring First Nations value

  • Support to governments and mining companies in achieving relinquishment 

  • The building of confidence incentivising future resource sector investment and meeting expectations of sustainability based investors.

 

This presentation will discuss the work of the Cooperative Research Centre for Transformations in Mining Economies (CRC TiME) in its first two and half years as it implements a research agenda to unpack this complex systems challenge and develop innovative solutions to unlock the value associated with mine closure  A semi-quantitative and indicative analysis of this model suggests more than $ 2 billion in value could be generated for all stakeholders.  Key research findings support the development of new value paths through alternative land-use, incentivisation of new investment, globalisation of commercial IP and services, agricultural development, indigenous social benefits, reduced Government costs, progressive  rehabilitation and regional closure service livelihoods.

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Join the Global Livestream or
join in-person 

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Join the Post-Conference Dinner 
(same Venue ) 

Book your table of 10, book individually or bring a guest. 

Enjoy amazing views of the city overlooking the Swan River, great entertainment and a sumptuous 3-course meal that includes beverages.

Network with international, interstate and local professionals 

More details on Guest Speakers coming soon.......

6.30pm - 11.30pm 

Hurry, bookings are filling and space is limited 

Venue

The Venue

State Reception Centre

60 Fraser Ave, West Perth

 

Location & Parking 

Accommodation  

Boasting floor to ceiling windows, Fraser’s Kings Park is located in the tranquil surrounds of Kings Park and sits high above the city with views of Perth and the beautiful Swan River.

The Centre is located off Fraser Avenue in Kings Park and Botanic Garden, above Fraser's Restaurant. 

The centre was built in 2011 to accommodate the Commonwealth Heads of Government Meeting Leaders’ Retreat 

There is also a wonderful connection between the new centre and the Commonwealth by the use of recycled wandoo timber for the building’s balcony decking that came from the stadium seating used for the 1962 Empire and Commonwealth Games in Perth.

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SPONSOR 

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GOLD SPONSORSHIP 

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SILVER SPONSORSHIP 

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NETWORKING SPONSORSHIP 

25

EXHIBIT OPPORTUNITIES 

Sponsor or exhibit

Sponsor or Exhibit 

Please fill in the below form to register for a prospectus. You can also email minesandenvironment@jazcorpaustralia.com.au for more information.

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