# MACHINERY
> MSHA accident `220121450009` · 05/15/2012 · Amrize Cement Inc.
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** MACHINERY
- **Accident type:** Over-exertion NEC
- **Occupation:** Warehouseman, Bagger, Palletizer/Stacker, Store keeper, Packager, Fabricator, Cleaning plant operator
- **Activity:** Surface equipment, NEC
- **Injury source:** DRIL-PRCUSV,HRD ROC,JKHMR
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** BACK (MUSCLES/SPINE/S-CORD/TAILBONE)
- **Days lost:** 0
- **Mine experience:** 5 years
## Operator
- **Controller:** Holcim Ltd
- **Operator:** Amrize Cement Inc.
- **Mine:** [0500037](https://api.ai-analytics.org/mine/0500037)
## Narrative

Employee was jackhammering a vertical refractory wall in the calciner, working from his knees when he felt a shooting pain in his back.

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