# MACHINERY
> MSHA accident `220090750002` · 03/06/2009 · Knox Creek Coal Corporation
## 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, NEC
- **Injury source:** ROOF (ROCK) BOLTS
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 50
- **Mine experience:** 0.06 years
## Operator
- **Controller:** Massey Energy Company
- **Operator:** Knox Creek Coal Corporation
- **Mine:** [4406804](https://api.ai-analytics.org/mine/4406804)
## Narrative

Roof Bolter Operator was bending a roof bolt and felt a sharp pain in his lower back.

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