# SLIP OR FALL OF PERSON
> MSHA accident `220113500018` · 12/12/2011 · Unimin Corp
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 0
- **Mine experience:** 25 years
## Operator
- **Controller:** S C R-Sibelco Nv
- **Operator:** Unimin Corp
- **Mine:** [3100673](https://api.ai-analytics.org/mine/3100673)
## Narrative

Employee was checking belts on flotation cell. He stepped over the diffuser shaft to get to the other side when his foot slipped. He was trying to catch his balance and twisted his knee .The employee did not report the incident until 12/14/11 at 7:45 am. The employee has not missed any work but is on modified duty until further notice.

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