Bar down

{
  "id": "MLC-T-IND-000421",
  "term": "Bar down",
  "field": "Industrial and trades",
  "definition": "To inspect and remove loose or unstable rock from the roof (back) and walls (ribs) of an underground excavation using a long scaling bar. This safety procedure is performed after blasting and before any other work begins in a newly advanced area to prevent rockfalls. The scaler taps the rock with the bar, listening for a hollow sound that indicates a detached slab, which is then pried loose.",
  "subject": "Mining and extraction",
  "translations": {
    "de": "Erz auflockern",
    "es": "desatascar con barra",
    "fr": "débloquer à la barre"
  },
  "url": "https://mlchart.com/terminology/industrial/bar-down/"
}