Archives

Archive

The impact of standard of care on dams survivability

Using ORE2_Tailings we can quantify the impact of standard of care on dams survivability. In this blogpost we take three dams, namely Dam x, Dam y and Dam z. Their design was identical with initial factor of safety of 1.3. In addition, they had similar QA/QC, construction method, same systemic approach, efforts and uncertainties consideration. Various small mishaps hit the dams along their history. Some repairs occurred, under different contracts, different quality control and finally, at different times. It turns…

Read More

Tailings dams failures insurance perspective

It is interesting to read about Tailings dams failures insurance perspective. Riskope helped solving miners’ insurance denial issues for the last 15 years. Riskope also recognizes the issue is becoming much wider than mining due, for example to climate change impacting residential and private parties. Tailings dams Recent papers from Willis Towers Watson  quote tailings dams failures frequency at two failure per year. In a 2013 paper (Oboni, C., Oboni F., Factual and Foreseeable Reliability of Tailings Dams and Nuclear Reactors -a…

Read More

Quantitative Convergent ERM to Solve Real Life Problem

Riskope presented at Infonex (https://infonex.com/ ) Quantitative Convergent ERM to Solve Real Life Problem. The conference was carried out on Zoom and the talks were, of course recorded. What is ERM?  Enterprise risk management (ERM) is a plan-based decision-making support. It allows its users to enhance their tactical and strategic planning and therefore to increase competitiveness. Indeed, it aims to identify, assess, and prepare a project, corporation to cope with threats and hazards. Threats and hazards can occur with different…

Read More

Tailings dams knowledge base creation

Tailings dams knowledge base creation is about how to acquire the information needed to perform well documented risk assessments. Of course, there are many possible ways to create the necessary knowledge-base for a risk assessment that is compliant with the new Global standard. Today we will discuss a few possible ways to do so at a high-level.At Riskope we passionately believe that only a blending of these approaches is capable of bringing the answers needed for high quality risk assessments…

Read More

Dams Failure modes and catastrophic failures

Today we explore the relationship between Failure modes and catastrophic failures. Catastrophic failure of tailings dam and its water management structures are the likely result of the failure of a number of essential components or any combination of states. We purposely use a different terminology from failure modes because they explain how the dam can fail, but not why. If we look at past events, hydro dams and tailings dam are similar as, for example Oroville and Fundao did fail…

Read More

Strategic operational and tactical planning for tailings hydro dams

We are learning that structural integrity of hydro dams is also becoming an issue. Thus, similarly to tailings dams, we need a strategic operational and tactical planning for tailings hydro dams! Karl Terzaghi, American Society of Civil Engineers, “Terzaghi Lectures, 1974-1982,” American Society of Civil Engineers (1986) ISBN 0-87262-532-X. proposed that a dam rating system should provide ALL of the following: A logical framework for rating the relative safety of a dam Allow for the use of judgment and experience…

Read More

Comparison of ORE2_Tailings estimated dam failure probabilities

The comparison of ORE2_Tailings estimated dam failure probabilities is an important element of Riskope continued commitment to test the validity of the approach. Quantitative risk assessment in tailings One can perform a Quantitative Risk Assessments (QRA) using various methods. Indeed, for tailings dam risks, they all consist in evaluating the: probability of failure of the dam generated by various pertinent hazards, potential consequences of a dam system collapse (failure) and finally the risk. The technical and mathematical tools for performing…

Read More

Global Industry Standard on Tailings Management

On Wednesday August 5th ICMM, UNEP and PRI launched the Global Industry Standard on Tailings Management. In this blogpost we offer some comments on the Global Industry Standard on Tailings Management. We salute this initiative that we have supported already at draft level. Indeed, at that time we wrote our comments and notes via email and online portal. That was following the public Consultation invitation which gathered a total of 629 responses. The consultation report We found the Global Tailings…

Read More

Hosted and powered by WR London.