Mining (Hardrock)

{
  "id": "MLC-T-ENV-017444",
  "term": "Mining (Hardrock)",
  "field": "Environment",
  "definition": "Traditional hardrock mining usually involves digging tunnels and adits (horizontal entrances into hillsides) to reach lodes of mineral-rich ore. Traditional underground mining and open pit mining require that the ore-bearing rock be removed and then put through a milling and extraction plant to extract the desired minerals. After the ore body is exhausted, miners move on leaving behind huge mounds of finely-ground tailings and coarser waste rock, as well as an underground tunnel complex and/or open pit.",
  "synonyms": [
    "Hardrock Mining"
  ],
  "subject": "Water",
  "references": [
    "National Pollutant Discharge Elimination System (NPDES) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/mining-hardrock/"
}