# FALL OF ROOF OR BACK
> MSHA accident `220162930015` · 10/11/2016 · Rockwell Mining LLC 
## 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:** Blackhawk Mining LLC
- **Operator:** Rockwell Mining LLC 
- **Mine:** [4606618](https://api.ai-analytics.org/mine/4606618)
## Narrative

Retreat mining on the #1 Section. The CM broke down in the #2 Entry for approx. 2.5 Hrs. The pillar line began to work. Once the CM was repaired, the #2 jack was moved up approximately 5' and reset. As the pressure was relieved from the #1 jack, the gob area began to fall in the #1 Entry and rode over into the #2 Entry onto the jacks. The fall was approx. 19'W x 28'L x 6'H.

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