The distribution of ore grades within a deposit is of mixed character, being partly structured and partly random. On one hand, the mineralizing process has an overall structure and follows certain laws, either geological or metallogenic; in particular, zones of rich and poor grades always exist, and this is possible only if the variability of grades possesses a certain degree of continuity. Depending upon the type of ore deposit, this degree of continuity will be more or less marked, but it will always exist; mining engineers can indeed be thankful for this fact because, otherwise, no local estimation and, consequently, no selection would be possible. However, even though mineralization is never so chaotic as to preclude all forms of forecasting, it is never regular enough to allow the use of a deterministic forecasting technique . This is why a scientific (at least, simply realistic) estimation must necessarily take into account both features - structure and randomness inherent in any deposit. Since geologists stress the first of these two aspects, and statisticians stress the second, I proposed, over 15 years ago, the name geostatistics to designate the field which synthetizes these two features and opens the way to the solution of problems of evaluation of mining deposits <...>

In early August 2012, following failed wage negotiations and civil unrest, about three thousand striking platinum miners employed by Lonmin plc gathered on a hill close to the town of Marikana in the North West province of South Africa. Nine out of ten Lonmin miners were migrants, mainly from the Eastern Cape, who lived next to the mine in squalid shacks and informal settlements.1 During a confrontation on 16 August, police opened fre, wounding 78 miners and killing 34 others. Many of those killed and injured were shot in the back.

Mining operations may be classified into surface mining, where the operations are unconstrained and open to the sky, and underground operations, where mining takes place in tunnels and galleries. In both situations roads play a key role as a typical mining operation consists of moving overburden (waste material) and ore from where the material was formed or deposited, to waste dumps or beneficiation plants.

In history, before miners had access to productive equipment  and blasting agents, mining was hard and hazardous manual work. The idea of excavating large volumes of rock to access even the richest mineral zones was not feasible, and, as a result, ore veins were selectively followed, predominantly close to the surface, or inside mountains. During the past century, introduction of diesel power and electricity, combined with new methods of mineral dressing, paved the way for large scale open pit mining, and later for mechanized underground mining. Nevertheless, the largest quantities of ore are still excavated from surface deposits.
Atlas Copco, as an equipment supplier with a truly global presence, has been at the forefront of technical and innovative development. From pneumatic to hydraulic power, from railbound to trackless haulage, from handheld to rig mounted rock drills, and lately, from manual to computerized operation, Atlas Copco expertise is making mining safer and more efficient. <...>