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Questions on ALARP studies at Tailings 2022

 Readers and conference delegates asked the following Questions on ALARP studies at Tailings 2022 and when they read a case study on ALARP optimization. National regulation compliance Are the results of an ALARP analysis consistent with national regulations and design requirements?  When we perform an ALARP analysis we consider local regulations. These will drive some a priori mitigative selections by the engineer of record. These bear on the nature and aim of mitigation stages  for the ALARP analysis. For instance,…

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A Case Study on ALARP Optimization

A Case Study on ALARP Optimization is the title our paper at Tailings 2022. The combination of probability of failure and consequences generates the potential risks of dams and other structures. Designers and owners should design, mitigate and monitor throughout the life and toward closure of dams. The GISTM indicates an ALARP objective for mitigation. In the paper we use an anonymized case to show how a dam’s probability of failure and risks evolve with its raising. In a second…

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Zero to 300 in thirty

Zero to 300 in thirty is not the performance of a new sensational sport car. And we are talking about thirty years, not seconds! Actually, zero to 300 in thirty years is the cumulative experience Riskope and its founders have dealing with tailings dams risk assessments all over the world.  You should not understand it as an “average” evaluation either, as the evolution has been trending towards exponential. Let’s discover together what we are talking about. Zero to 300 in…

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TCFD and TNFD for mining

TCFD and TNFD for mining: concepts, examples and caveats, is the paper we presented at #CIMBC22 Mineral Economics and Finance. Photograph provided by: Adolfo Tribst Corrêa We asked the audience if they were familiar with the: Task Force on Climate Related Financial Disclosure (Task Force on Climate-Related Financial Disclosures | TCFD) (fsb-tcfd.org) and Task Force in Nature-related Financial Disclosure (TNFD – Taskforce on Nature-related Financial Disclosures). Only a couple hands rose. Significant points of our discussion on TCFD and TNFD for…

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Impact of climate change change projections on tailings dams survivability

Impact of climate change projections on tailings dams survivability is the paper we presented at #CIMBC22 Climate Change and Tailings Management. The authors are M. Gloor, G. Halter, of Correntics (Correntics – we make global supply chains future proof) and Cesar and Franco Oboni. Image by TheOtherKev from Pixabay The session was brilliantly chaired by George Hemingway of Stratalis Three papers on Climate Change and Tailings Management  Charles Dumaresq presented the protocols for climate change consideration in mining projects. The…

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FUV vs RIDM friends or foes at CIMBC22

FUV vs RIDM friends or foes at CIMBC22 sounds like a riddle, right? But it is not! Please, note FUV was actually never written as an acronym. Actually FUV stands for firmitas, utilitas, et venustas in Latin language.  Today we freely translate the terms into English as reliability, serviceability and beauty, straying a tad away from the original meaning. However, Henry Wotton, a seventeenth century translator, coined “firmness, commodity, and delight” as essential components of all successful architectural design. Wotton remained faithful…

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World-wide ORE2_Tailings quantitative risk assessment experience

Riskope’s world-wide ORE2_Tailings quantitative risk assessment experience can be summarized in one single graph we will show below. ORE2_Tailings™ (©Riskope, 2014-*) is a subset of ORE (Optimum Risk Estimates) which is a “universal” platform for quantitative risk assessments, ERM we deploy for: mining, i.e. tailings, open pits, transportation, forestry and finally suppliers. We have deployed ORE for hundreds of operations worldwide. Today we will focus on tailings storage facilities. Sample portfolio for ORE2_Tailings™ performance summary  We selected a sample portfolio…

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Recent failure at Pau Branco Mine, MG, Brazil

The recent failure at Pau Branco Mine, MG, Brazil is a classic example of cascading events. At this Vallourec Mineração (VMN) iron ore mine the failure of an uphill structure/slope led to overtopping of a downstream retention structure. As a result a flood reached a highway and the environment. Photograph provided by: Adolfo Tribst Corrêa A bit of Pau Branco innovation history Back in 2015 this mine was touted as a technological success when a new filter press module was installed.…

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