|Series||Best practice environmental management in mining|
|Contributions||Australia. Environment Protection Agency.|
|The Physical Object|
|Number of Pages||36|
Tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an gs are distinct from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.. The extraction of minerals from ore can be done two ways: placer mining, which uses water. Containment and "decharacterisation" work progressing for at-risk structures Brazil iron ore major Vale expects to book US$ million in net new provisions related to its tailings dam decommissioning programme when it reports full-year and December-quarter financial results next week. After settling and self-weight consolidation, the dry density of the undesiccated tailings is a function of the G s of the tailings solids. For coal tailings, the dry density is about t/m 3 due to their low G s, while for metalliferous tailings the dry density is up to t/m 3 due to their higher G s. Figures (a) and (b) show typical wet and dry density and w profiles with depth for. Tailings containment facilities are regarded as the world's largest man-made objects. Terminology. Mine tailings' size and composition depends on the mining method. For hardrock metal mines, tailings are usually a very fine mud or powder, which is left over after ore is crushed and valuable minerals are extracted from it.
The engineering firm that designed the Mount Polley tailings pond containment system that collapsed on Aug. 4 also designed a tailings dam that failed catastrophically in . James G. Speight, in Heavy Oil Recovery and Upgrading, The Oleophilic Sieve Process. An oleophilic sieve process (Kruyer, , ) offers the potential for reducing tailing pond size because of a reduction in the water requirements. The process is based on the concept that when a mixture of an oil phase and an aqueous phase is passed through a sieve made from oleophilic materials. In Canada, most mines manage their tailings as a slurry deposited behind containment dams (designated in this report as “conventional tailings facilities”). In the wake of small and large‐ scale tailings facility failures, the risks posed by conventional tailings facilities are coming under. Tailings containment 34 Containment wall design and construction 38 Seepage control 38 Tailings delivery 40 Water Management 40 Dust control 43 Closure, decommissioning and rehabilitation 43 CASE STUDY: Planning for Tailings Storage Facility Closure at Mt McClure, WA
This is something we need to know quickly, too, because if a catastrophic collapse can affect one tailings pond containment dam without warning, it can affect others in the province. He chaired the investigation of the Omai tailings dam failure for the government of Guyana in and served as a member of the Mount Polley Independent Investigation and Review Panel in He has authored two books, including a comprehensive textbook on tailings dams, and published several articles related to dam safety and risk analyses. Tailings containment "battle-lines" re-open with unique ferocity Published by MAC on Source: Earthworks, MiningWatch Canada () The mining industry and its advocates are soon to publish their first "Global Standard" to prevent tailings' dam disasters. Worldwide, it is estimated that there are an average of two tailings dam failures every year[i]. In Australia, the regulatory environment has made it extremely difficult to build a new dam. These are indications that current practice is not working to the level required. Not only can tailings storage work better, but it can also be done economically.