# FALL OF ROOF OR BACK
> MSHA accident `220102700029` · 09/23/2010 · Hecla Limited
## Details
- **Degree of injury:** ACCIDENT ONLY
- **Classification:** FALL OF ROOF OR BACK
- **Accident type:** Accident type, without injuries
- **Occupation:** —
- **Activity:** —
- **Injury source:** —
- **Nature of injury:** —
- **Body part:** —
- **Days lost:** 0
- **Mine experience:** — years
## Operator
- **Controller:** Hecla Mining Company
- **Operator:** Hecla Limited
- **Mine:** [1000088](https://api.ai-analytics.org/mine/1000088)
## Narrative

A rock burst happened during the afternoon shift blast. it was discovered by the graveyard shift boss and reported to MSHA. The area is question was about 8 feet long by 4 feet wide. It knocked out one 4 foot bolt but did not go beyond the 8 foot anchorage zone.

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