November 17, 2019

Tierra Group co-authors “Baseline Investigation and Prelimiary Design for an In-Pit Tailings Storage Facility, El Gallo Mine, Sinaloa” for Tailings & Mine Waste 2019


ABSTRACT: Minera Pangea recently completed a feasibility study (FS) for an in-pit tailing storage facility (IPTSF) that will receive tailings from reprocessing of approximately 10 million tonnes of heap leach material (HLM). The HLM from the existing El Gallo heap leach…

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April 15, 2019

Tierra Group publishes “The Legacy of Upstream Tailings Dams”


The mining industry was traumatized by the Feijão tailings dam failure in Minas Gerais (Brumadinho), Brazil on 25 January 2019. The Feijão failure occurred a mere 38 months since the Fundao tailings dam failure (also in Minas Gerais) in November…

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June 1, 2018

Tierra Group publishes “In Pit Tailings Storage - Converting Liabilities Into Assets”


Following the August 2014 Mt. Polly tailings dam breach in British Columbia, Canada, the British Columbia Government, through the Ministry of Energy and MInes, together with the Williams Lake Indian Band and the Soda Creek Indian Band, chartered an independent…

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June 1, 2017

Tierra Group publishes “Tailings Stewardship: Training from the Tailings Beach to the Board Room”


ABSTRACT: Implementing a Corporate Tailings Stewardship Strategy begins in the Board Room with a corporate pledge to zero-tailings dam failures and, like a safety culture, extends throughout the organization to the boots-on-the-ground TSF operations team personnel. Tierra Group International, Ltd.'s…

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November 29, 2016

Tierra Group publishes “Tailings Stewardship - Adding Value to Due Diligence”


ABSTRACT: acquiring new properties to increase production is a strategy for growing your mining business and, not unlike buying a used car, caveat emptor (let the buyer beware). It is leadership's responsibility to protect assets, reduce liabilities and mitigate or…

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October 6, 2016

Field Identification and Mitigation of Geosynthetic Clay Liner Seam Separation in a Tailings Impoundment Composite Liner System


ABSTRACT: The use of geosynthetic clay liners (GCLs) as a component of composite liner systems in landfills, ponds, heap leach facilities, and tailings impoundments has increased significantly over the past five to ten years. Field observations (Thiel and Richardson, 2005 and…

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October 6, 2016

Solution Collection Pipes on Slopes


ABSTRACT: The solution collection system commonly used in heap leach facilities consists of a basal drainage layer of crushed rock (overliner) and embedded perforated pipes installed above the geomembrane and below the ore heap. The solution percolates vertically downward through the…

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October 6, 2016

Stress Redistribution of Adjacent Solution Collection Pipes


ABSTRACT: Corrugated dual-walled polyethylene pipes are commonly used in the solution collection system of heap leaching facilities. Under load, these pipes tend to deflect, thereby developing passive soil support at the sides of the pipe. At the same time, the vertical…

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