# FALL OF ROOF OR BACK
> MSHA accident `220093570010` · 12/10/2009 · Knox Creek Coal Corporation
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** FALL OF ROOF OR BACK
- **Accident type:** Struck by falling object
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Machine maintenance
- **Injury source:** CAVING ROCK,COAL,ORE,WSTE
- **Nature of injury:** FRACTURE,CHIP
- **Body part:** FINGER(S)/THUMB
- **Days lost:** 121
- **Mine experience:** 3 years
## Operator
- **Controller:** Massey Energy Company
- **Operator:** Knox Creek Coal Corporation
- **Mine:** [4406804](https://api.ai-analytics.org/mine/4406804)
## Narrative

EE was replacing bit inserts on cutter head on Joy CM. A piece of rock measuring 9"" wide X 16"" long X 2"" thick fell from  between the bolts striking his left hand between the rock and cutter head.

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