Main mine┬áSafety is at the top of Cementation CanadaÔÇÖs agenda, and it has helped deliver greater productivity and efficiency as well, Roy Slack tells Ruari McCallion. There was a time when underground mining was rightly regarded as one of the most dangerous activities on Earth. When news comes in of a cave-in or underground explosion from some or other of the worldÔÇÖs emerging economies, it may seem that little has changed.