Metals VIVersion en ligne Surface mining versus Underground mining. Technologies for spanish speakers. par tekno TEKNESO 1 Thismethod is much less common, and produces, for example, 15% of minerals in the United States Hints 1 This method requires horizontal, diagonal or vertical accesses 2 This method is more expensive than the other 3 This method generates more risks to workers than the other 4 It consists of digging tunnels or shafts into the earth to reach buried ore deposits