# SLIP OR FALL OF PERSON
> MSHA accident `220042230002` · 07/30/2004 · BHP Navajo Coal Company
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** SLIP OR FALL OF PERSON
- **Accident type:** Over-exertion NEC
- **Occupation:** Blaster, Shooter, Shotfirer, Explosive worker, Powder gang/monkey
- **Activity:** Handling explosives
- **Injury source:** GROUND
- **Nature of injury:** SPRAIN,STRAIN RUPT DISC
- **Body part:** KNEE/PATELLA
- **Days lost:** 74
- **Mine experience:** 3.1 years
## Operator
- **Controller:** BHP Billiton
- **Operator:** BHP Navajo Coal Company
- **Mine:** [2900097](https://api.ai-analytics.org/mine/2900097)
## Narrative

Employee was laying out surface delays when he stepped over a surface trunkline with his right foot and buckled his knee.  He lost his balance momentarily but didn't fall.  His right knee twisted when the soft drill cutting gave way while transferring his body weight from his left foot to his right foot.

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