# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220100960017` · 03/29/2010 · 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:** 0
- **Mine experience:** — years
## Operator
- **Controller:** Heidelberg Materials AG
- **Operator:** Heidelberg Materials US Cement LLC
- **Mine:** [1200063](https://api.ai-analytics.org/mine/1200063)
## Narrative

At approximately 7:41am the rupture vents on the #2 coal system opened due to an ignition of coal dust inside the coal grinding circuit.  Prior to the ignition the coal weigh belt stalled causing a reduced amount of coal feed into the grinding mill which resulted an elevated temperature at the mill exit.  There were no personnel injuries or equipment damages.

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