# FALL OF ROOF OR BACK
> MSHA accident `220000460031` · 02/07/2000 · Cobre Mining Company
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** FALL OF ROOF OR BACK
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** —
- **Mine experience:** — years
## Operator
- **Controller:** Phelps Dodge Corp
- **Operator:** Cobre Mining Company
- **Mine:** [2900233](https://api.ai-analytics.org/mine/2900233)
## Narrative

ON 2-1-00, A FALL OF GROUND DRIFT. THE FALL HAD CAUSED THE LEAD STEEL SET TO COME DOWN FROM THE SIDE PRESSURE OF THE RIB FALLING ON SET, WHICH IN TURN CAUSED IT TO COME DOWN. THE TOTAL TONNAGE OF THE RIB FALL/ROOF FALL IS APPROX. 50 TO 100 TONS. THE DRIFT IS PART OF THE PRIMARY EXHAUST OUT OF THE BOREHOLE. THE FALL WAS DISCOVERED BY MCO, ID F3M. THE LAST VISUAL INSPECTION WAS DONE

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*