Simon Barry, a lead consultant: risk and standards, at The Advisory Group, shares his opinions on how to manage tailings risks following the launch of the recent Global Standards on Tailings Management
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The requirement – the why?Simply put, a mine needs to be able to mitigate all of the risks to its operational and social environment to as low as reasonably practical. This is most efficiently done by applying the risk-based approach that follows the guidelines set in ISO 31000 and using other relevant ISO standards as appropriate.
The approach – the how?There are choices, and the development of new technologies makes them broader. One approach is to look at a narrow area of what may be considered as the pressing issue, the other is to take a holistic approach and work towards an integrated solution that is cost effective and adds value. This article argues for the latter. Most tailings disasters are actually ESG disasters. The consequences for the operator have been shown above and to them can be added: legal action against those responsible, and also increased difficulty in raising capital through institutions that are starting to demand transparent compliance with ethical standards, and evidence that it is taking place on a continuous basis; again strengthening the requirement for ground truth. The Risk Management approach coordinates activity to determine and implement controls to reduce or remove the full range of risks. They are often connected, so a silo type approach is usually going to be inefficient in terms of both cost and process.
The process – the detailThe first step is identifying the real risks and compiling a comprehensive risk register. This is where ‘context’ comes in and it has to be applied to each operation, and cover it comprehensively. It is this process that must be owned by the operation because the risks are theirs. From the evaluation of each risk in context comes the identification of those critical information requirements that will enable an informed solution to be defined, a process to be established and the whole process line to be owned by the most appropriate person in management. Regular review and oversight are the critical elements once an effective system has been instituted.
The integrated approachTailings should actually be addressed as part of overall water management, as water is the major risk to mining operations beyond just tailings. It requires effective management just to make the operation work cost-effectively. While the tailings risk is unlikely to affect the actual mining effort; a collapsed tailings dam can destroy the mine’s value as well as a company’s reputation and licence to operate. Rather than look at tailings in isolation it actually makes more sense to include it as part of water management. The process is similar as the information requirements will differ in terms of what needs to be collected, but the processing of the data can be rationalised across a comprehensive system.
Artificial Intelligence and RoboticsThese technologies are game changers and make an integrated risk approach easier to achieve. They have the ability to both enhance resilience and manage and act upon data more efficiently than humans. Digital workers can automate many of the tasks and conduct activities, which includes making decisions and escalating issues, where these are rules based – ‘if the data says this then do that’. The bots can send alerts to the human operator for them to action. Artificial intelligence (AI) means many things. In the case of mines, AI (machine learning) can process data to learn things, make predictions, spot trends and tell whoever needs to know details that may not be apparent based on their experience/ intuition alone. A single digital operations room can monitor activities for any number of mines, providing a reliable, resilient and low cost service (the bots will always turn-up, work 24×7, do not get tired or sloppy, are accurate and do not act malevolently) that works remotely and very cost-effectively to support any mining operation, anywhere.
One possible solution – an exampleAn open pit mine in sub-Saharan Africa is operating in a jurisdiction where relations are tense, there is artisanal mining and water is always an issue. The tailings dam seems sound for the moment but may become an issue in the years to come. Communities live downstream from both the pit and tailings dam, and allegations of pollution are routine. The risk register process raises the requirement for information about water, and associated geology, from various sources. For the pit, the requirement is to know when failure may occur in time to take preventative action, through the measurement of pore pressure. Pore pressure monitoring is an accurate method to measure the weight of water in a slope and enables early intervention to delay or prevent failure. Sensors exist to detect this. For the tailings dam the requirement could be warning of movement in any of the X, Y or Z axes (it could also be pore pressure if desired). All these sensors collect data, which must be processed in order to produce an effect. This effect can be a validated procedure executed by a trained human, or an automated response from a robot. The connectivity is shown below.
Value addThe process outlined above can be enhanced and adapted to include the sensing of, and action on, any risk related information requirements. Its resilience can be verified by robotic oversight that will provide confidence in its reliability. The system would also be structured to remove any single point of failure. Operations can be monitored in real-time at board level on the other side of the world. In addition, more routine aspects of efficient management such as environmental air and water quality, personnel on site, HSE and security can be monitored using this system. In the above example, it would enable oversight of the artisanal miners and compliance with ESG concerns in a verifiable way.
In conclusionAn integrated risk-based approach, following well-established international guidelines, can follow the principle of ‘the creation and protection of value’ through an effective process of risk management. That process can also address ESG issues and provide credible transparency to all key stakeholders, regardless of location. Finally, the potential afforded by AI and Robotics enhances the resilience of such a system.
ABOUT THE AUTHOR:Simon Barry, is a lead consultant: risk and standards, at The Advisory Group. Barry holds a MSc in Risk Management from the University of Leicester, is a specialist member of the UK Institute of Risk Management and a ISO 9001 lead auditor. He has worked in mining and associated activities across sub-Saharan Africa since 2008, as well as in a number of high-risk locations. With extensive experience in aviation, logistics and management development he is a firm proponent of the team-based integrated approach to problem solving, addressing the hard questions early. Prior to 2004 he spent 32 years in the British Army’s Parachute Regiment where he operated in many demanding roles worldwide, within a variety of cultures and environments. Originally published by Mining Review.
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