# MACHINERY
> MSHA accident `220103550029` · 12/15/2010 · Dominion Coal Corporation
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY 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:** UNDERGRD MINING MACHINES
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 0.42 years
## Operator
- **Controller:** Sunoco, Inc.
- **Operator:** Dominion Coal Corporation
- **Mine:** [4406759](https://api.ai-analytics.org/mine/4406759)
## Narrative

The employee was installing a 5' torque-tension roof bolt in a 40"" mining height which required the bolt to be bent. The operator had started the bolt into the mine roof and was attempting to straighten the bolt when he felt pain in his back.

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