# IGNITION OR EXPLOSION OF GAS OR DUST
> MSHA accident `220031360003` · 05/10/2003 · 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 IN TO THE HOLE, IT WAS BEING SPUN AT A HIGH RPM TO MIX THE RESIN. AFTER SPINNING FOR THE REQ'D TIME, THE B OLT WAS THRUST UPWARD INTO THE HOLE. AS IT WENT UP, A SPARK WAS CAUSED AND A FIST SIZED BALL OF FLAME WAS OBSERVED. IT IMMEDIATELY EXTINGUISHED ITSELF LOCATION- NO. 5 ENTRY X-CUT, MMU-001-0

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