# MACHINERY
> MSHA accident `220240460010` · 02/13/2024 · Martin Marietta Materials Inc
## Details
- **Degree of injury:** NO DYS AWY FRM WRK,NO RSTR ACT
- **Classification:** MACHINERY
- **Accident type:** Struck by flying object
- **Occupation:** Driller, Highwall operator, Highwall drill operator
- **Activity:** Machine maintenance
- **Injury source:** METAL,NEC(PIPE,WIRE,NAIL)
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** HEAD,NEC
- **Days lost:** 0
- **Mine experience:** 0.06 years
## Operator
- **Controller:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials Inc
- **Mine:** [0900069](https://api.ai-analytics.org/mine/0900069)
## Narrative

Surface drill operator assisting mechanic removing internals of a 4-inch down hole hammer (off the drill). Inertia movement of internal piston caused it to knock the internal sleeve out of casing, striking driller in forehead.  Driller received 3 sutures and returned to work immediately.

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