# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220133520029` · 12/15/2013 · 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

Operator received an alarm in the ccr indicating that coal mill vent doors opened. No personnel injuries or property damages. No sounds heard from workers in burner building or ccr. kiln operating parameters, coal mill inlet and outlet temperatures were normal at the time of the event. Small amount of smoldering coal was found to be present in the inlet duct.

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