# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220150300032` · 01/17/2015 · Martin Marietta Materials, Inc.
## 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:** Martin Marietta Materials Inc
- **Operator:** Martin Marietta Materials, Inc.
- **Mine:** [3300156](https://api.ai-analytics.org/mine/3300156)
## Narrative

A laborer returned to #7 Burning Floor to rake grates. Moments after inserting the rake, EE heard a loud sound and felt a gust of air from the kiln. Upon investigation, it was discovered that this sound was the `rupture disc rupturing  in the duct work from the #7 cyclone that was caused by a surge of air through the kiln. There were no injuries associated with this event.

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