# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220040440016` · 01/27/2004 · Heidelberg Materials US Cement LLC
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** IGNITION OR EXPLOSION OF GAS OR DUST
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** —
- **Mine experience:** — years
## Operator
- **Controller:** Heidelberg Materials AG
- **Operator:** Heidelberg Materials US Cement LLC
- **Mine:** [1200063](https://api.morvs.ai/mine/1200063)
## Narrative

AT APPROXIMATELY 11:05 PM THE #1 KILN COAL FIRING SYSTEM EXPERIENCED ON EXPLOSION IN THE ENCLOSED DUCT WORK OR COAL MILL CAUSING THE PRESSURE RELIEF RUPTURE DISK TO BURST. THIS RUPTURE DISK IS DESIGNED TO RELIEVE SYSTEM PRESSURE IN THE EVENT OF AN EXPLOSION.

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