Feeds:
Posts
Comments

Archive for the ‘Heap leach’ Category

DSC00803

Had a chance today to look through the proceedings of the upcoming conference Heap Leach Solutions 2014 scheduled in Lima, Peru for November 10 through the 13th, 2014. The paper that caught my eye and caused me to stop and read it is titled Leach Pad Cost Benchmarking.  The authors are Mark E. Smith and Denys Parra of Anddes Asociados SAC, Peru.  Two famous folk in the field of heap leach pads.  You will have to wait for the proceedings to be published to get a copy, but for now let me quote from the paper. Here is the paper abstract: (more…)

Read Full Post »

DSCF4530

Today was a typical day in the life of a mining consultant.  One report was issued; one project put on hold; one request for proposals received; and a long discussion on how to deal with an obdurate client. (more…)

Read Full Post »

 DSCF3710 - Copy

The exterior surface of most tailings, waste rock, and heap leach facilities include:

  • A top deck which is the flatter surface that forms the top surface of the facility. This is usually sloped at between one and five percent, primarily to promote runoff.
  • The sideslopes which are easily covered if they are inclined at about five horizontal to one vertical (5H:1V) but which in practice may be as steep as 1.4H:1V.

Covers on the top deck are less subject to erosion, slope instability, and soil creep than covers on sideslopes. Thus different covers may be appropriate at the same facility on the top deck as compared to the sideslopes.  Here are a few idle thoughts on sideslope covers for mine waste facilities. (more…)

Read Full Post »

DSC01958

The BC  Northwest Community College, School of Exploration & Mining is to be congratulated on a superb set of courses offered in 2014.  Lori Knorr sent me this list:  (more…)

Read Full Post »

DSCF1796

In addition to blogging, I consult to the mining industry.  And I work with Andy Robertson who also owns InfoMine to promote conferences — something InfoMine has decided to undertake in a big way. A few months ago, Andy asked me what topic I thought would make for a good conference.  A short reflection and I suggested geosynthetics in mining.   Way back in 1974 or thereabouts, I became familiar with geosynthetics when i used Bidim to make the base of a tailings facility in South Africa.  I became very familiar with geosynthetics about five years ago when Andy and I suggested geotextiles and geogrid placed on frozen tailings for the Suncor Pond 5 cover base.  In between, I have designed geogrid reinforced slopes, built reinforced walls, placed covers and liners, and read about geosynthetics.  (more…)

Read Full Post »

DSCF1685

On the plane to the site I dipped into Nasim Taleb’s latest book, Antifragile.  I read a few chapters and have stowed the book for the return fight.  But I picked up enough to know that an antifragile system is one that thrives on change, shock, time, and other perturbing factors.  An antifragile system is the opposite of a fragile system that inevitable breaks as a result of time, shock, disturbance, and the propagation of a mere crack. Antifragile system thrive on disorder; fragile systems do not. (more…)

Read Full Post »

DSCF1247

There is no limit to the future of geosynthetics in mining.  Right now almost fifty percent of geosynthetics are sold to mines.  I predict the percentage will increase.  Why? (more…)

Read Full Post »

Older Posts »

Follow

Get every new post delivered to your Inbox.

Join 586 other followers