# FALL OF ROOF OR BACK
> MSHA accident `220002090009` · 07/23/2000 · Maple Creek Mining Incorporated
## 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:** Robert E  Murray
- **Operator:** Maple Creek Mining Incorporated
- **Mine:** [3600970](https://api.ai-analytics.org/mine/3600970)
## Narrative

ROOF FALL AT 1 MAIN B TRACK AT 146 X-CUT; IT MEASURES 20'W, 20'L, 8'H, DOMED. A CLAY VEIN RAN HORIZONTALLY ACROSS INTERSECTION. THE AREA HAD BEEN MINED 12/69 WITH A CONTINUOUS MINER AND SUPP ORTED WITH 6' CONVENTIONAL ROOF BOLTS. OVER TIME, 7' AND 10' POINT ANCHOR BOLTS HAD BEEN INSTALLED RANDOMLY TO REPLACE OLDER BOLTS WHICH BECAME DISLODGED.

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