Room and pillar

{
  "id": "MLC-T-IND-004935",
  "term": "Room and pillar",
  "field": "Industrial and trades",
  "definition": "A method of underground mining where mineral deposits are extracted in a series of 'rooms' or open excavations, while 'pillars' of the same material are left in place to support the mine roof. This technique is widely applied to relatively flat-lying ore bodies such as coal seams or bedded deposits. The size and spacing of pillars are engineered to maintain stability throughout the mine's operational life.",
  "synonyms": [
    "pillar and stall"
  ],
  "subject": "Mining and extraction",
  "translations": {
    "de": "Kammerbau",
    "es": "cámaras y pilares",
    "fr": "chambres et piliers"
  },
  "url": "https://mlchart.com/terminology/industrial/room-and-pillar/"
}