# EXPLODING VESSELS UNDER PRESSURE
> MSHA accident `220201490020` · 05/26/2020 · Upstone Materials Inc.
## Details
- **Degree of injury:** DYS AWY FRM WRK & RESTRCTD ACT
- **Classification:** EXPLODING VESSELS UNDER PRESSURE
- **Accident type:** Struck by flying object
- **Occupation:** Crusher attendant/operator, Pan feeder operator/worker
- **Activity:** Machine maintenance
- **Injury source:** COAL & PETROL PRODUCT,NEC
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** HAND (NOT WRIST OR FINGERS)
- **Days lost:** 12
- **Mine experience:** 9.08 years
## Operator
- **Controller:** Colas S A
- **Operator:** Upstone Materials Inc.
- **Mine:** [3000963](https://api.ai-analytics.org/mine/3000963)
## Narrative

EE was adjusting the jaw die setting on the crusher. While EE's right hand was on the rod the hydraulic cylinder became overpressurized and failed on the cylinder end. When the cylinder failed the hydraulic fluid hit EE's hand at a very high pressure. The cylinder failure caused severe bruising and a laceration to EE's right hand and the back of the arm above the wrist.

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