# FALLING/SLIDING/ROLLING MATERIALS
> MSHA accident `220152040014` · 07/20/2015 · The National Lime & Stone Company
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** FALLING/SLIDING/ROLLING MATERIALS
- **Accident type:** Struck by falling object
- **Occupation:** Plumber, Pipefitter, Millwright
- **Activity:** Machine maintenance
- **Injury source:** BROKEN ROCK,COAL,ORE,WSTE
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 0
- **Mine experience:** 20.98 years
## Operator
- **Controller:** National Lime & Stone Co.
- **Operator:** The National Lime & Stone Company
- **Mine:** [3300127](https://api.ai-analytics.org/mine/3300127)
## Narrative

Employee was unplugging the Canica Crusher when a rock fell from the top of the crusher and hit his knee.  Was diagnosed with a sprain/strain of the knee.

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