Dear SANIRE Member, we are apologizing for any problems being experienced during the download process, but we are experiencing very large download volumes. Be patient and try again. When successful downloading please check the following:
Install Paper 1 Material
o Download the Installer file from the website
o Double click of the Installer and allow it to install the information on your computer
o When done, the Installer will create an Icon on your desktop that reads 'Rock Mechanics Theory', use this icon to open the document. You do not need to open any other files, but work through th...
Rock related safety is a major issue. The Chamber of Mines' Mine Occupational Safety and Health (MOSH) initiative is helping to address it. Find out more by reading on.
In 2003, representatives of the South African Mining industry - employers, labour unions and government - set historic and significant milestones for health and safety, to be reached by 2013, en route to zero harm for all employees.
The Chamber of Mines realised that the milestones, let alone the targets, would not easily be met without significant effort on the part of mines. Therefore the Chamber of Mines Learning Hub was ...
Roger Johnson's enjoyment of his job is based on the people he works with; the diversity in terms of commodity, geographic location and mining method; and the challenges and opportunities to introduce new technology, better practice and improved solutions. Here, he shares some of his ideas and experiences with Rock Talk.
Roger Johnson (56) had more of an interest in sport, the outdoors, music and social activities than in academics in his time as a scholar as La Salle College on the West Rand, but that was no predictor of his future.
Today, he has a slew of degrees and other qualifications t...
Comprehensive rock engineering learning material for the South African mining industry is almost complete – and you can download it for free. Read more about it.
The writing of comprehensive rock engineering material for the South African mining industry started in the first half of 2011. It should be completed by end of March this year. At the time of writing this article, Paper 1 was complete. It should be available for download, free of charge, on the Sanire website by the time you read this article. The other papers will be available for download as and when they are completed.
Why is t...
The Bushveld platinum group metal deposits are two distinct, shallow-dipping stratiform tabular ore bodies which strike for many hundreds of kilometres. Mining is extensive, with depths ranging from close-to-surface to 2300 m. The mining method is a variation of planar open stoping. Pillars are widely employed to support the open stopes. In the deeper levels, in-stope pillars are required to fail in a stable manner soon after being cut, and the residual pillar strength is used to stabilize the hangingwall. These pillars are commonly known as crush pillars. Little work has been done in the p...
The University of Pretoria's Jannie Maritz asks: Are teaching and learning really making an impact? At Tuks, he thinks they are. Read on to find out why.
The University of Pretoria's department of Mining Engineering celebrated its 50th anniversary in 2011. The first mining engineering student enrolled for the degree in 1961 and subsequently graduated in 1964.
A lot has changed on and around the campus, yet one thing has stayed the same: The quality of mining engineer graduating has improved. Every year, Tuks Mining is delivering around 30 newly developed mining engineers into the industry. ...
A glance at Dr Nielen van der Merwe’s CV reveals a slew of leadership positions, starting with being the head prefect of Hoërskool Voortrekker in Boksburg and culminating in his current position as Professor, Centennial Chair for Rock Engineering, at the Wits School of Mining Engineering.
He has become a doyen of rock engineering, having first come into contact with the discipline during his post-graduate training at Goldfields. “In the rock engineering department, I saw that engineering work was actually done, as opposed to management in production,” he explains.
This love for the real work of engineering has seen him become a Fellow of South African Academy of Engineering, membership of which is limited to 100 engineers across all disciplines in South Africa.
That is just one achievement among many – he has prizes, awards, qualifications and publications galore to his name. His perseverance and determination to strive for seemingly impossible excellence has paid off, again and again.
Two of the positions he has achieved stand out. Nielen is currently the President of the Federation of International Geo-Engineering Societies, which has a combined membership of some 35 000 geo-engineering professionals worldwide. He also served as the President of the International Society for Rock Mechanics (ISRM) from 2003 to 2007. He says: “If I could reach this, as a son of Africa, any young Sanire member can.”
Long involvementNielen values his Sanire membership and has been involved in the institute and its predecessor since the early 70s.
“Being involved has given me the opportunity to learn about different approaches to the same problem and similar approaches to different problems in rock and soil mechanics, mining and civil engineering environments,” he says.
“Sanire’s greatest benefit is contact, contact and contact. Here and all over the world. I also love the social contact after technical events.”
Maybe this gives him a further opportunity to engage in what he says he loves most about his current job: “Learning by arguing with bright post graduate students, combined with continued contact with reality by consulting. I thoroughly enjoy finding out where the technology gaps are and filling them through the university work.”
The social side of his job also gets a mention: “I appreciate the continued contact with friends in France and elsewhere via joint projects and discovering new places in the world through the other associations I serve.”
Changing fieldHe says the most encouraging thing about rock engineering at the moment is that there are so many young people joining the profession. “Our average age was a concern a while ago.”
But it’s not all rosy. “I am still concerned about the level of knowledge and qualification and also the lack of formal training in rock engineering. That said, who trained the older generation? Nobody was around to train people like Salamon and Wagner – or even my generation. We read whatever we could get and thought and argued about what we saw underground.”
Nonetheless, Nielen emphasises: “I will retire satisfied professionally once we do serious research again in mining in South Africa.”
He also says younger rock engineers have to operate in a changed world. “Our times were different and we could do things that people would get arrested for today. We worked hard and played hard and never mixed the two.”
Nielen is able to recount many funny stories, including this one: “There was the guy we rescued after being trapped for 48 hours following a rockburst at Doornfontein. We had to mine through solid quartzite with paving breakers to get to him. We took turns being in front, for short spells only because of the heat. Once, when we swopped positions, the guy who was in front encouraged the trapped man by shouting to him ‘Hlala gahle, my boy’ and he replied in a creaking voice, ‘Upi mina azi ******* hamba?’”
Varied interests

Nielen is happily married to Hantie “a more supportive person than I deserve” and enjoys spending time with his family, all of whom appreciate free thinking. “We have animated discussions when we get together and we love nature and good music,” he says.
He points out that their three children have totally diverse personalities and have followed different careers. Melani (36) is a teacher, Hein (35) is an advocate and Nielen (27) is a paramedic.
Free time is really precious. “I try to make the most of it. I listen to opera and love romping with the dogs on the beach at sunrise. When there was more time, I coached rugby, but now I go to Loftus to watch good rugby whenever possible. This year, I could only go twice. Maybe that’s why the Bulls got nowhere. I also cultivate chillies and deep red roses,” he elaborates.
Couple time is also high on the agenda. “When Hantie accompanies me overseas, we try to have one day away from everybody else, no appointments, no meetings. It’s not always possible, but we try.”