You know what has happened lets try and figure out what Should happen next........ This is were I am starting; A risk assessment of the long-term, post-closure performance of a tailings facility may be undertaken to compare alternative closure scenarios or to guide design of the closure works. A post-closure risk analysis of a closed tailings facility may be used to understand if the closed facility generates societally acceptable risks. The results of such a risk assessment depend significantly on the post-closure performance period specified for the comparison or design. This paper explores the question of appropriate periods to be considered in a risk assessment of the performance of a closed tailings facility. Specifically, the paper looks at the outcome of various risk assessments for various closure design periods of 200, 500, and 1000 years during which periods a statistically-determined number of Maximum Credible Events occurs. We show that design of closure works for different time frames may result in significant cost differences and perceptions of what constitutes a good closure approach. Risk-based decision making based on rational and conceptually-sound risk assessment methodologies proves to be an invaluable tool in bringing clarity to the ongoing debate on how best to assess the consequences of mine closure.) 200 years, 500 years 1000 years! well lets get busy the future is counting on us all.
Posted on: Thu, 09 Oct 2014 11:56:01 +0000
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