# FALL OF ROOF OR BACK
> MSHA accident `220160740013` · 03/10/2016 · Northern Star (Pogo) LLC
## 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:** —
- **Mine experience:** — years
## Operator
- **Controller:** Sumitomo Metal Mining Co Ltd
- **Operator:** Northern Star (Pogo) LLC
- **Mine:** [5001642](https://api.ai-analytics.org/mine/5001642)
## Narrative

While foam grouting in the 1300 EXP, a wedge in the back failed, pulling ground support out with it and also impeding passage. Grouters were approx. 6 feet away from failure in the deck of a getman scissor lift. Grouters were pumping chemicals into a grout hole when the wedge came out. It is believed that the grout being injected displaced the rock and caused it to slip

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