chapter  14
Mechanical Excavation in Coal Mines
Pages 16

Coal plays an important role in power generation. As seen from Figure 14.1, 40% of the world’s electricity comes from coal. This may continue for decades (International Energy Agency 2012). At current production levels, proven coal reserves are estimated to last 150-200 years or more. Coal reserves of some countries, and annual productions at the end of 2009 are given in Table 14.1 (International Energy Agency 2012).