# FALL OF ROOF OR BACK
> MSHA accident `220072140042` · 07/28/2007 · Lone Mountain Processing 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:** 0
- **Mine experience:** — years
## Operator
- **Controller:** Arch Resources Inc
- **Operator:** Lone Mountain Processing LLC
- **Mine:** [1518647](https://api.ai-analytics.org/mine/1518647)
## Narrative

The roof fell prematurely in front of the #3 and #4 MRS units pulling 4 rows of roof bolts. The miner breaker had knocked while in the #32 lift and the miner had to be retrieved. This delay allowed the roof to work and load up the MRS. When the MRS units were released to move, the roof fell. The roof was previously supported with five foot Hy-Tech bolts.

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