Which type of mining requires that a large diameter drill to extract coal from seems? auger

room and pillar

surface

mountaintop removal

It has helped with the European economies, traveling within the EU is better and easier, the countries in the EU will basically never go to war because they are allies. 

As for culture, the culture has kinda spread around since the countries are unified. Like I said they can travel easier so culture gets spread and shared I guess you could say. Hope this helps man