Coal power supplies most of the electricity that we use here in America. It’s been that way for a long time. Because of coal’s popularity as a source of power, mines, both active and abandoned, lay scattered across the nation. And now, with coal’s popularity waning, the number of abandoned mines could increase. Since 2001 alone, 100 coal-fired plants have taken their turn in front of the firing squad.
And it doesn’t seem as though it’s over. If the trend of extinguishing coal-fired plants continues, more and more mines will be shut down, not to mention mines that simply up and quit. But what is to be done with the abandoned mines? It isn’t as though we can just dispose of them at some hi-tech facility. These mines will become useless scars.
Two engineers from the University of Oviedo have an idea, though. In their research, which is being published in the journal Renewable Energy, Rafael Rodríguez and his colleague María Belarmina Díaz claim that mine shafts on the point of being closed down could be used to provide geothermal energy to local towns.