# MACHINERY
> MSHA accident `220211650020` · 06/10/2021 · Aracoma Coal Company, LLC
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Roof bolter, Rock bolter,  Pinner, Mobile roof support operator (MRS)
- **Activity:** Roof bolter, Inserting bolt
- **Injury source:** ROOF (ROCK) BOLTS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** SHOULDERS (COLLARBONE/CLAVICLE/SCAPULA)
- **Days lost:** 121
- **Mine experience:** 1 years
## Operator
- **Controller:** Alpha Metallurgical Resources Inc
- **Operator:** Aracoma Coal Company, LLC
- **Mine:** [4609575](https://api.ai-analytics.org/mine/4609575)
## Narrative

While installing a roof bolt, employee was straightening the 5 foot bolt to be pushed up into the hole when the bolt twisted causing a pop in left shoulder 

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