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Information systems and risk management

Information systems and risk management discusses the necessity to create a structured and holistic view on all corporate information. Therefore we look at and how the holistic view should relate to upside and downside risks. Information systems are the set of analytical applications geared toward preparing corporate or project system’s data for business analyses and support to risk informed decision making. Downside risk is the product of the probability of occurrence of a hazard by the cost of the undesirable…

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Tailings dams quantitative risk assessment

Tailings dams quantitative risk assessment has to rely on proper evaluation of consequences and probabilities. The goal is to be able to economically and swiftly prioritize a portfolio of dams. That is in order to develop risk informed decision making for mitigation as also discussed in a recent blogpost. ORE2_Tailings app to evaluate probabilities ORE2_Tailings app is primarily addressing the needs of owners or regulators of dam portfolios. A dam portfolio may cover several extractive centers, several mining companies with…

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Consequences of tailings dams failures

Recent tailings disasters such as the failure of the Mount Polley and Samarco dams have focused the attention on the Consequences of tailings dams failures. Consequences of tailings dams failures: outflow volume and runout distance Classic approaches Various classic approaches (Rico et al., 2008, Azam & Li, 2010) assume that the volume of released tailings is a function of storage volume. Dam height intervenes, particularly for the runout distance preliminary evaluation. They find “statistical correlations” using a set of dam…

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Questions from a reader interested in risk assessment

We received a number of questions from a reader interested in risk assessment. After we replied we thought these questions may be of general interest, so, here they are, with their answers. General questions from a reader interested in risk assessment Q1: On your website you use acronyms such as FTA and ETA what are these? A1: Failure Tree Analysis (FTA), Event Tree Analysis(ETA) are tools used to evaluate the probability of failure and/or the development of complex events starting…

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Tactical and Strategic tailings dams risk management

Tailings 2.0 is designed to allow Tactical and strategic tailings dams risk management. Tactical and strategic tailings dams risk management The definition of corporate risk tolerance and acceptability foreseen in Tailings 2.0 allows to sort risks in tolerable/acceptable, intolerable but manageable, intolerable and requiring a strategic shift (in short: strategic risks). This is the most pertinent and efficient way to sort risks. We can actually see the three different classes of risk, namely the blue, yellow and red classes. The…

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ORE2-Tailings allow benchmark of tailings dams probability of failure

Today we discuss how ORE2-Tailings allow benchmark of tailings dams probability of failure. The considered mine for this case history has a portfolio of 15 dams. The figure below shows in the vertical axis the annual Probability of failure (pf) results under the form of yellow vertical bars. The extreme of the bars represent the minimum and maximum estimates of the probability of failure for each dam. Hence, the length of the bars measures the uncertainty on the evaluation of…

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Space observable data for tailings dam probability of failure

Tailings 2.0 first step is focusing on Space observable data for tailings dam probability of failure.  The probability of failure for each dam in the clients’ portfolio is in essence the result of a multitude of actions/inactions, features and behaviors. Portfolios can go from one to a few dams and finally, for example, hundreds of dams. In this second TMW2018 course summary blogpost we discuss how probabilities are evaluated. However all the fundamental steps which constitute the theoretical developments are freely…

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Tailings and Mine Waste TMW2018 Short Course: Tailings 2.0

During the one day Tailings and Mine Waste TMW2018 Short Course: Tailings 2.0 we will discuss a synergistic approach for Tailings dams risk assessment and long term monitoring. Tailings 2.0 encompasses an updatable, scalable, drillable and convergent Quantitative Risk Assessment (QRA) platform (see ORE2-Tailings ) and Space Observation monitoring as main or complementary to extant classic monitoring programs. ORE2-Tailings ORE2-Tailings uses multiple data sources to deliver initial estimates regarding probability of occurrence of dams’ failures, benchmarks them with the world-wide…

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