Methods of Mining. University of KentuckyAccording to the Kentucky Department of Mines and Minerals, 131.8 million tons of coal was mined in Kentucky in 2000; 62 percent (81 million tons) was from.mining methods by h menz,What are the main methods of mining? | American Geosciences .There are four main mining methods: underground, open surface (pit), placer, and in-situ mining. Underground mines are more expensive and are often used to.
mining methods by h menz