Upcast

{
  "id": "MLC-T-IND-006371",
  "term": "Upcast",
  "field": "Industrial and trades",
  "definition": "A mine ventilation shaft through which contaminated air is expelled from the underground workings to the surface. It forms the outlet of a ventilation circuit, with fresh air entering through a corresponding downcast shaft. Large fans, located either on the surface or underground, create the pressure difference that drives the airflow, drawing out dust, gases, and heat generated by mining operations.",
  "subject": "Mining and extraction",
  "translations": {
    "de": "Wetterschacht",
    "es": "pozo de ventilación de salida",
    "fr": "puits de retour d'air"
  },
  "url": "https://mlchart.com/terminology/industrial/upcast/"
}