Mng quiz 4 Study guides, Class notes & Summaries

Secondary mining method to recover additional coal from under the highwall of a contour mine when the ultimate stripping ratio has been achieved in open cast operations. - correct answer Auger mining This method is used to recover deep deposits, that can easily be dissolved by a solvent. Typically, it would be too expensive to mine using underground methods. Water, acid and steam are common solvents. Examples of commodities include: uranium and...