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Posts Tagged ‘Directive 74’

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I have written extensively in this blog about the Alberta Directive 74. Generally I have been derogatory about the Directive. For example at this link I write the following: (more…)

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Most engineers have no idea what the strength of a soil or tailings implies.  Let me write a little about the physicality of soil and tailings of a given strength. (more…)

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When we arrived in North America we envisaged a great career consulting to the mining industry.  We had been successful consultants in South Africa providing many services to many mines.  We gave advice, they built what we suggested, and sometimes we produced a report when the work was done. (more…)

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A great idea, but hard to do practically.  I refer to the practice called Co-Disposal of tailings and waste rock.   Mike Gowan, a principal of Golder Associates in Brisbane is probably the expert.  Here is a link to one of his few publications on the topic.  It is best to download and save the PowerPoint presentation,  rather than try to open directly from the source.  (more…)

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Geosynthetics have been used in constructing covers and access roads over soft tailings at the Cannon Mine, Wenatchee, at impoundments at Wismut, and most recently at Pond 5 at the Suncor oil sands tailings mine in Alberta.  We are currently evaluating similar technical procedures for a mine in Chile where we will build access roads over the soft tailings to enable big rigs to go to install deep wells to recover groundwater from beneath the impoundment to augment water supplies in a desert.  (more…)

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The Second International Oil Sands Tailings conference is underway in Edmonton, Alberta.  Here is my summary of two days of listening to presentations. (more…)

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These past two days we have been in sunny Vail, Colorado at the conference on tailings and mine waste.  Sadly you will have to buy the volume from the organizers to read the papers.  With a bit of patience, we will post some of the presentations on InfoMine in the near future.  Meanwhile let us urge the authors to update their papers on the basis of new ideas gained here at the conference and hence paste their papers on their websites so that we may all more freely share in the information and lessons learnt.   (more…)

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