# SLIP OR FALL OF PERSON
> MSHA accident `220051400021` · 05/07/2005 · O-N Minerals (Chemstone Company)
## Details
- **Degree of injury:** DAYS RESTRICTED ACTIVITY ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Fall to lower level, NEC
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** ANKLE
- **Days lost:** 0
- **Mine experience:** 1 years
## Operator
- **Controller:** Oglebay Norton Company
- **Operator:** O-N Minerals (Chemstone Company)
- **Mine:** [4400026](https://api.ai-analytics.org/mine/4400026)
## Narrative

Ee rolled ankle when bolt broke from mushroom damper. Ee was bracing himself, standing on conveyor walls of the chute. Ee left foot was forward, right foot behind. Left foot was used to apply pressure to break the bolt. When bolt broke, ee weight shifted to right foot causing his ankle to roll over on the chute wall.

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