# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220031360004` · 05/11/2003 · Westmoreland San Juan Mining 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:** BHP Billiton
- **Operator:** Westmoreland San Juan Mining LLC
- **Mine:** [2902170](https://api.ai-analytics.org/mine/2902170)
## Narrative

ROOF BOLTER OPERATOR WAS INSERTING A BOLT INTO A BOLT HOLE. AS THE BOLT WAS PUSHED INTO THE HOLE, IT WAS BEING SPUN AT HIGH RPM TO MIX THE RESIN. AFTER SPINNING FOR THE REQ'D TIME, THE BOLT WAS THRUST UPWARD INTO THE HOLE. AS IT WENT UP, A SPARK WAS CAUSED AND A FIST SIZED BALL OF FLAME WAS OBSERVED. FLAME LASTED APPROX. 15 SECONDS LOCATION- NO.3 ENTRY XCUT 53, MMU-001-0

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