2. Mining Methods - Copper
Open pit mining is the most widely used technique of mining copper today. It is accomplished by creating and using benches or terraces to gradually reach deeper under the earth's surface. Underground mining is used when the copper ore is not near the earth's surface.3 Technologies in Exploration, Mining, and Processing,,Read chapter 3 Technologies in Exploration, Mining, and,in Exploration, Mining,,the general layout of a modern mine, the methods of mining,,What are the main methods of mining? | American,,There are four main mining methods: underground, open surface (pit), placer, and in-situ mining.