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Common Cause Failures impact Risks

20-06-2018

Today, we look at what happens when Common Cause Failures impact Risks. Common Cause Failures impact Risks defined Common cause failures (CCFs) are almost “simultaneous” failures of specific system’s elements resulting from single shared causes or coupling factor (or mechanisms). By applying the definition above we can immediately see there are two families of CCF: The coupled CCF, i.e. interdependent failures where one element failure drives the failure of another element and The uncoupled CCF where Physical or environment stresses…

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Landslides risk assessment

13-06-2018

Natural and man-made slopes portfolio require Landslides risk assessment in order to ensure sustainable management. Slopes present hazardous geo-morphological processes such as landslides which can occur discretely (some deformation, cracking followed by a large movement) or “continuously” (deformations ranging between a few millimeters and several centimeters per years with occasional accelerations followed by a return to “average velocity”). Shall we manage hazards or risks? Any slope, anywhere in the world, has a probability of occurrence (of “first” failure). Continuously sliding…

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proposal for a mine waste classification system

6-06-2018

The proposal for a mine waste classification system recently described by Ljiljana Josic and Lawrence Devon Smith fills a blatant (and often costly) gap in the industry standards. Factors like management, legislation and permitting of mining wastes have become driving forces in decisions. NI43-101 and other public disclosure requirements will further boost all related issues. The need for unified and univocal glossary and unequivocal definitions is of course of primary importance. The same occurs in risk management. A proposal for…

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Open pit walls catastrophic failure probabilities for a captive insurance

30-05-2018

Four or five years ago an insurance company asked us to estimate open pit walls catastrophic failure probabilities for a captive insurance. A that time of our study recent publications of pit wall failures databases we not yet available. Like we did for tailings dams failures in 2013 we used approximate data we found, i.e. a sample portfolio of forty open pits records and a table from a 1996 Swedish with 24 open pit failures research. Open pit walls catastrophic…

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Australian law firm plans to sue world’s No.1 miner BHP

23-05-2018

Australian law firm plans to sue world’s No.1 miner BHP. They argue BHP knew the Samarco dam was “at imminent risk of breaking”, but BHP was not transparent, breaching regulations. Reportedly the basis of the class action will be the belief the mining company mislead investors over safety measures, including public warning systems while it was aware of an “imminent collapse” and its very serious potential consequences. Australian law firm plans to sue world’s No.1 miner BHP The owners of…

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Data required for ORE2-Tailings risk assessment

16-05-2018

Every group we present ORE2-Tailings to is curious about the Data required for ORE2-Tailings risk assessment. In follow-up to a presentation, the client requested the following three information:  What are the 30 diagnostic points ORE2-Tailings uses to evaluate the annual probability of failure of a dam?  Is there a peer reviewed publication about the methodology?  What are the steps to define the risk tolerance of a corporation or an operation/project? Data required for ORE2-Tailings risk assessment This section summarily describes…

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Tailings 2.0: Space observation, quantitative risk assessment bring value and comply with societal demands

9-05-2018

At the coming Tailings and Mine Waste conference (TMW2018) Riskope and MDA will jointly present a one day course entitled “Tailings 2.0: Space observation, quantitative risk assessment bring value and comply with societal demands” Tailings 2.0: Space observation, quantitative risk assessment bring value and comply with societal demands During the “Tailings 2.0: Space observation, quantitative risk assessment bring value and comply with societal demands” course we will review state of the art risk assessment methodologies and space observation technologies that together…

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