lime use on copper mining

How Mining Works - Resolution Copper The Resolution Copper deposit lies more than a mile beneath the surface. The most viable way to recover this ore body is by going underground, using a process called block caving. Block caving is a proven mining method using advanced technologies. Acid Mine Drainage - Ground Truth Trekking Of note for future mine development, 90% of the mines that predicted "low" acid mine drainage potential had acid mine drainage problems at the time of the study. In Alaska Acid mine drainage is a problem at a number of active Alaskan metal mines including Red Dog, Greens Creek, and Kensington Mine . Copper Mining History and Copper Harbor Michigan Many hammered copper knives, arrow and spear heads and axes were recovered at ancient mining sites. Some fine examples are on display at Fort Wilkins. In 1842, the Chippewa ceded all claims to 30,000 square miles of the Upper Peninsula to the United States Government.    Read More