Feeds:
Posts
Comments

Archive for the ‘Engineering – General’ Category

Last week I needed to brush up on stability analysis of waste rock dumps or embankments as they are sometimes called.  I went to the obvious sources: EduMine.  I opened the course Design  and Operation of Large Waste Dumps by Tim Eaton and Scott Broughton. In the section on Analysis they present a masterful description of the various failure modes and how to analyse them. They add this on probability of failure: (more…)

Read Full Post »

UtilityDIVE reports at this link as follows:

Duke Energy reported its Q4 2014 earnings this week and company officials say it is preparing to pay a $100 million fine to settle the ongoing investigation into a coal ash spill into the Dan River in North Carolina.

(more…)

Read Full Post »

Flexible Evaporation Solutions

Walked around the exhibit hall at the Denver SME convention.  Chatted to old friends and met new people–and learnt of new products. Suddenly my mind was cast back to my days as a kid on the East Geduld Mine in South Africa where we grew up.  The area was arid; there were no natural water bodies within two-hundred miles.  One of our favorite places was the mine’s evaporation ponds.  On our rickety bicycles we would break through the flimsy security gate and spend hours around the ponds.  They were magic: a wonderland of color and water.  Better than those fountains at the Bellagio in Las Vegas. (more…)

Read Full Post »

Here are links to a few of many publications and presentations for the USACE of the topic of risk assessment of dams and levees.  Katrina forced them to think hard and deep.  This is a snapshot of the work.

Risk-Informed Approach to Flood-Induced Dam and Levee Failures

Risk Management Guidelines, Prioritization, and Process

USACE Levee Safety Program

The questions that arise are: Should the mining industry adopt similar criteria, methods, and results?  Should the Canadian Dam Association be leading the way on this?  How will we be able to justify a significantly different approach?

Read Full Post »

DSCF5874

The snow blanketed us today as the Denver Society of Mining Engineers convention begun.  Yet it is warm enough to walk through the snow in shirt sleeves.  Typical Denver in winter/spring. Yesterday I attended the short course on Seismic Engineering for Tailings Dams.  It was well-attended and featured magnificent speakers who brought us up-to-date with current practice in predicting earthquakes and analyzing their impact on mine tailings dams.   Of course there was discussion of predicting the maximum credible earthquake, which Jonathan Bray says we are doing it wrong.  Contact me if you want the details. (more…)

Read Full Post »

DSCF5389

EduMine has just posted at this link, a Spanish version of our (Bernard Brixel and my) course Introduction to Groundwater Modelling for Mines & Mining.

The English version has proven popular since it was first posted in 2013.  Now it will be easy for Spanish speakers to also do the course.

I must thank AngloGold Ashanti for sponsoring the translation.  We all owe them a vote of confidence.  For they support continuing education.

This course joins my other, associated course in English and Spanish on Groundwater in Mining.  Translation of that course was sponsored by Goldcorp.  Thanks too to them.

If you do the course, and see room for improvement, please let me know.

And keep in mind the other two courses on EduMine on groundwater modeling:

Groundwater Modeling for Mining 1 – Model Conceptualization.

Groundwater Modeling for Mining 2 –  Numerical Modeling

Bernard and my two courses and their Spanish translations are introductory–they will lead you into the topics so that you can plan, manage, review, and at the first cut, deal with groundwater in mining.  The two noted just above by my colleagues here in Robertson Geoconsultants, are detailed and best tackled once you have some background, knowledge, experience, and practical involvement.

Read Full Post »

DSCF5736

This week I had reason to go back and re-read three papers I co-authored in the early 1980s.  It is surprising how far advanced we were then, and how little things have changed, or how little of what did has become standard practice. The first paper is at this link.  Rick Call was the lead on the work we describe in this paper.  He was a large buff man, with an enormous beard, a perpetual pipe, and a totally irreverent attitude towards authority.  He sent Ned Larson and me to Texas, where we sweated through the heat to get the data.  Then back to Tucson to do the calculations.  I recently reconnected with Ned who is now in Las Vegas and the grandfather of sixteen grandchildren.  He is still with the U.S. Department of Energy which he joined after working with me for five years on the UMTRA Project in Albuquerque.  He is a great engineer, as was Rick. (more…)

Read Full Post »

Older Posts »

Follow

Get every new post delivered to your Inbox.

Join 698 other followers